Abstract

In this paper, a thermally tunable metamaterial absorber comprising a periodic array of metallic circle resonator with strontium titanate (STO) has been proposed in the terahertz regime. Due to the special active material, STO is adapted as the dielectric layer, thermally tunable is implemented in the absorber. A full-wave numerical simulation is performed and the results reveal that the peak absorption of the absorber reaches 99.9% at 2.48 THz when the temperature is set as 400K, and the central frequency can shift from 2.48 to 1.71 THz when the temperature varies from 400K to 200K. Furthermore, the electric field distribution and surface current distribution are investigated to better understand the absorption mechanism. Besides, the influence of the polarization angle and oblique incident angle to the absorber is studied and the results show that the peak absorption remains above 90% up to 60of the incidence angles for the TE mode and 55for the TM mode. The absorber can be scalable to the infrared and visible frequencies, and can be potentially applied to imaging, detection and tunable sensing.

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

1. Introduction

Metamaterial absorbers (MMAs), an important aspect of terahertz technology, has attracted enormous attention for its promising intriguing applications in nondestructive detection, sensing and imaging, and solar harvesting [1–4]. Plenty of structures of MMAs has been proposed in the past several years since the first MMAs was demonstrated by Landy [5]. However, the absorption spectra of many proposed absorbers are narrow in bandwidth which limits their practical application in the electromagnetism regime [6]. To achieve broadband absorption, various approaches have been investigated from microwave, terahertz to optical frequencies [7–11]. A common strategy is to utilize multi-resonances by embracing multiple resonators with small differences in geometry sizes within one unit cell [12–14], and the continuously small different resonance frequencies will be merged to form a broadband absorption. Another branch of effective broadband structures is to overlay the multi-layered pattern with different geometry parameters separated by dielectric with different thickness [15,16]. Besides, the lossy material including lumped resistor-loaded absorber and magnetic material-based absorber also have broadband absorption characteristic [17,18]. However, once the structure is fabricated, the absorption spectra of the absorber is fixed. From the viewpoint of practical applications, tunable absorbers are highly desired in switch, photodetector, absorption filter and so on [19–21]. Therefore, designing a dynamically tunable absorber is essential.

To implement tunable property in the absorber, several methods have been reported [22,23]. One popular way nowadays is to adopt new tunable materials such as graphene [24–27]. Various structures based on graphene have been proposed to make the absorber tunable. For example, a tunable absorber with periodically sinusoidally-patterned graphene layer is proposed and peak absorption of the absorber can be tuned from 14% to 100% by controlling the chemical potential from 0 to 0.8 eV [28]. However, the special-shaped graphene layer is often difficult in fabrication and realization, and then a dielectric-loaded graphene plasmon structure using nonstructured graphene is reported [13]. Nonetheless, the tunable modes in these absorbers are based on electric control and often only the amplitude of absorption can be effectively tuned. There also exist some other ways to achieve tunable property, as mentioned in [22] by Schalch and Duan, a tunable air spacer which can change continuously is adopted as the dielectric layer, so the absorption spectrum is dependent on the spacer thickness. Although there are some researches about the thermally tunable metamaterials, most are focused on modulators or converters, less about the thermally tunable perfect absorbers [29–32].

In this paper, we introduce a thermally tunable perfect absorber in the terahertz regime, whose central frequency can be effectively tuned. In our design, the frequency tunable property is achieved by adoption of active material-strontium titanate (STO) through temperature changes. Full-wave numerical simulation results show that a near unity absorption is obtained in the absorber with a 120 GHz bandwidth above 90% absorption when the temperature is set as 400K. And the central frequency can be tuned from 2.48 to 1.71 THz when the temperature varies from 400 to 200K while keeping 99% peak absorption.

2. Design and simulation

The designed thermally tunable absorber based on the strontium titanate (STO) active material in the THz regime is presented in Fig. 1, which is a sandwich structure composed of a metallic elliptical pattern and back ground spaced by the dielectric layer of STO material. As shown in Fig. 1, the terahertz wave vector is perpendicular to the pattern face, and the electric field direction is along the Px axis. The corresponding geometry dimensions of the unit cell are illustrated in Fig. 1(a), where the radius of the metallic elliptical pattern on the top layer is R=25μm, and the periodPx=Py=98μm. Both the top pattern and background plane are made of gold material with a conductivityσ=4.56×107S/m, and the thickness is m=n=200nm. The gold pattern and background is separated by a strontium titanate dielectric spacer with a thickness H=2μm. Strontium titanate is a kind of thermal active material, whose frequency dependent complex relative permittivity can be expressed as [32,33]:

εw=ε+fω02ω2iωγ
where the ε is high-frequency bulk permittivity and ε9.6, the f is a temperature independent oscillator strength and f=2.3×106cm2, ω is the angular frequency, and ω0 is soft mode frequency fitting by the Cochran law. It can be expressed as:
ω0(T)[cm-1]=31.2(T42.5)
The γ is soft mode damping parameter and can be fitted by an empirical linear dependence, which can be expressed as:
γ(T)[cm-1]=3.3+0.094T
The T is temperature, unit K, w0 andγ are temperature (T) dependent parameters. Therefore, STO material owns temperature dependent relative permittivity. In this work, a STO film is deposited on the metallic ground plane with a single circular gold patch above, which is functioned as a dielectric layer in the traditional sandwiched structure. The active material layer grants the absorber to achieve tunable property of central frequency, and the designed simple structure enables the ease of fabrication.

 figure: Fig. 1

Fig. 1 Proposed tunable terahertz absorber with a classical sandwiched structure consisted of metallic top layer and ground plane, spaced by STO material film. (a) Schematic presentation of the geometrical parameters in the unit cell. (b) Top view of the unit cell. (c) Schematic of the absorber. The corresponding geometry parameters are set as (unit:μm):Px=Py=98,R=25,H=2, m=n=0.2.

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In the modeling and simulation, we employ frequency domain solver of CST software and the frequency range is set as 1.5 to 3.0 THz. In the boundary condition setting, both the x-axes and y-axes as periodic boundary are set as unit cell and the two sides of z-axes are Floquet ports. According to the effective medium theory, absorption of the absorber can simplified and calculated by the equation A(ω)=1|S11(ω)|2|S21(ω)|2, where S11(ω) and S21(ω) are reflection coefficient and transmission coefficient, respectively. Furthermore, the S21(ω)equals to zero here due to the electromagnetic shielding by the gold background plane whose thickness (n=200nm) is much larger than the skin depth of incident wave. And the S11(ω) can be theoretically restricted as zero through impedance matching between free space and metamaterials, so near-unity absorption is achieved.

3. Results and discussion

A full-wave simulation based on finite integration algorithm of CST has been performed to study the absorption spectra of the absorber. Firstly, the parameters of the structure are optimized and the absorption spectra with the primary temperature T=400K is presented in Fig. 2. As we can see, a broad bandwidth of absorption with a near-unity peak absorption is obtained in the absorber. The peak absorption is located atf=2.48THz with a 99.9% absorption and the bandwidth of 90% terahertz absorption is 120 GHz from 2.42 to 2.54 THz.

 figure: Fig. 2

Fig. 2 Absorption spectra of the absorber under normal incidence with the primary temperature 400K in the TE mode.

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Primarily, we investigate the thermally tunable property of the absorber in detail, which is one of the most important features in the absorber. Firstly, we calculate the temperature-dependent permittivity of STO material. As shown in Fig. 3(a), the real part of permittivity of STO material under different temperatures between 200K to 400K are given and described by the curves with diverse colors. We can see that the real part of permittivity changes obviously with lower temperature levels, as the value increases from 223 to 509 when the temperature varies from 400K to 200K. And the value keeps increasing slowly across the whole study frequencies where the increasing rate rise at lower temperature levels. In the Fig. 3(c), we give the real part of permittivity changing with temperatures at the resonance frequency of 2.48 THz to know the STO material more intuitively. From the curves represented in Fig. 3(b), we can know that the losses angle tangent of STO material increase with both the temperature and frequencies of incident waves, and the increasing rate is greater when the temperature is lower.

 figure: Fig. 3

Fig. 3 The permittivity of STO material at different frequencies (1.5 to 3 THz) and temperatures (from 400 to 200K), (a) Real part of the permittivity, (b)The losses tanδ, (c) Real part of the permittivity changing with temperature at the resonance frequency of 2.48 THz.

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With the study above, we further investigated the thermally tunable property of the absorber by changing the temperature. From the Fig. 4, we can see that the central frequency shows an obvious red shift when the temperature decreases from 400K to 200K with a step-width of 50K, where the central frequency changes from 2.48 THz (corresponding to 400K, represented by the cyan curve) to 1.71 THz (corresponding to 200K, represented by the black curve). The tuning range of the central frequency reaches 0.77 THz in the absorber, and the peak absorption always remains more than 99%. Moreover, the absorber’s bandwidth of 90% terahertz absorption keeps stable with a partially narrowing down. which changes from 120 GHz to 60 GHz. It is worth noting that the structure is simple and ultrathin (only aboutλ/60), which enable the ease of fabrication and application.

 figure: Fig. 4

Fig. 4 Absorption spectra of the absorber with different temperature 200K, 250K, 300K, 350K, and 400K under normal incidence.

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To better understand the tunable absorption mechanism of the absorber, we study the electric field distribution corresponding to the peak absorption frequency 2.48 THz with the temperature 400K. As shown in Fig. 5(a), we can see that the strong electric field is mainly focused on the up and down side of the circle pattern, which indicate large charges are accumulated at the edge of the metallic pattern. For the TM mode, from the Fig. 5(b), we can see that the field distribution is the same when the unit cell is rotated by 90. Then, we get the field distribution from the normal incidence (Ez) from Fig. 5(c), and opposite charges are observed in the up and down parts of the golden pattern which agrees well with the description of electric dipole resonances.

 figure: Fig. 5

Fig. 5 Electric field distribution of the proposed absorber at the resonance frequency 2.48 THz. (a) For the TE mode in the x-y plane. (b) For the TM mode in the x-y plane. (c) normal incidence of incidence wave, along the Ezdirection.

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Next, we continue to investigate the surface current distribution of the proposed structure on the front pattern layer and the back ground layer. As shown in Fig. 6(a), the surface current on the back ground layer mainly flow from the bottom to the top along the corresponding edge of the top pattern. Meanwhile, when it comes to the surface current on the top pattern layer shown in Fig. 6(b), we can see the main current direction is opposite with the back ground layer. As a result, a virtual circle current is formed by the anti-parallel current from the top and back ground layer, which is the same as the description of magnetic polaritons [34]. As a result, we can conclude that the high absorption in the structure is based on the electric dipole resonances and magnetic polaritons, where the electric field and magnetic field of the incident terahertz wave are absorbed independently.

 figure: Fig. 6

Fig. 6 Surface current distribution at the peak absorption frequency point 2.48 THz with the temperature 400K. (a) Current on the back ground layer. (b) Current on the top layer.

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Furtherly, when it comes to the frequency tunable mechanism, we provide the electric field distribution of the peak absorption frequency points with different temperatures between 400K to 200K. As shown in Fig. 7, the electric distribution at 2.48, 2.33, 2.13, 1.94, 1.71 THz are given one by one from left to right pictures, responding to the temperature of 400, 350, 300, 250, 200K, respectively. We can see that all the field distributions are much similar with slightly different field strength, which is the same as the distribution of dipole resonance revealed above. It can be concluded that the main absorption resonance in the absorber is not changed with the temperature, and the central frequency occurring an obvious red shift from 2.48 to 1.71 THz can be attributed to the change of effective electrical size in the unit cell, where the effective electrical size of gold pattern increases due to the great permittivity increment of STO dielectric layer when the temperature varies from 400 to 200K.

 figure: Fig. 7

Fig. 7 Electric field distribution at different frequency points of 2.48, 2.33, 2.13, 1.94, 1.71 THz, when the temperature is set as 400, 350, 300, 250, 200 K, respectively.

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The effect of oblique incidence for both the TE and TM modes on the absorption in the absorber is also studied, as shown in Fig. 8. In the calculation, the absorption spectrum is given with the incident angles varying from 0 to 80with a step-width of 5when the temperature is set as 400K. We can see that the peak absorption decreases gradually with the oblique angles increasing for the both modes, but the peak absorption remains above 90% up to 60of the incidence angles for the TE mode and 55for the TM mode. And we can also see around 60% absorption at some frequencies points near the central frequency 2.48 THz, which is formed by other resonances resulted by the oblique incidences. The central frequency occurs a slight blue shift for the TM mode while remains almost unchanged for the TE mode.

 figure: Fig. 8

Fig. 8 Absorption contour map of the absorber as a function of incidence angle and frequency under oblique incidence angels from 0° to 80° with a step width 10°. (a) TE mode. (b) TM mode.

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4. Conclusion

In this paper, we proposed a thermally tunable absorber with near-unity absorption in the terahertz regime. By introducing the special active material strontium titanate (STO) as the dielectric layer in the traditional sandwiched-structured metamaterial absorber, the central frequency of the absorber can be effectively tuned by changing the temperature. According to the full-wave numerical simulation, the results show that a 99.9% absorption is obtained at 2.48 THz under normal incidence when the temperature is set as 400 K, and the absorber’s 90% terahertz absorption is 120 GHz. Besides, the central frequency of the absorber can be tuned from 2.48 to 1.71 THz gradually by adjusting the temperature from 400K to 200K, and the peak absorption always remains near-unity. Additionally, we performed the electric field distribution and surface current distribution to better understand the absorption and thermally tunable mechanism in the structure. Furthermore, some valuable properties are also found in the proposed absorber, such as polarization-independence and ultrathin thickness, which are resulted by symmetry design of the unit cell and high dielectric coefficient in the STO material. The proposed structure can be scalable to the infrared and visible frequencies, and can be applied in imaging, detection and tunable sensors.

Funding

National Natural Science Foundation of China (NSFC) (51777023); China Postdoctoral Science Foundation (CPSF) (2017M622963, 2017M620411).

Acknowledgments

The authors thank Dr. Jiamin Wu for the discussion about permittivity calculation of STO material.

References

1. J. Y. Suen, K. Fan, W. J. Padilla, and X. Liu, “All-dielectric metasurface absorbers for uncooled terahertz imaging,” Optica 4(6), 601 (2017). [CrossRef]  

2. C. M. Watts, X. Liu, and W. J. Padilla, “Metamaterial electromagnetic wave absorbers,” Adv. Mater. 24(23), OP98–OP120 (2012). [PubMed]  

3. T. K. Todorov, K. B. Reuter, and D. B. Mitzi, “High-efficiency solar cell with Earth-abundant liquid-processed absorber,” Adv. Mater. 22(20), E156–E159 (2010). [CrossRef]   [PubMed]  

4. L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014). [CrossRef]   [PubMed]  

5. N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008). [CrossRef]   [PubMed]  

6. X. Liu, C. Lan, B. Li, Q. Zhao, and J. Zhou, “Dual band metamaterial perfect absorber based on artificial dielectric “molecules”,” Sci. Rep. 6(1), 28906 (2016). [CrossRef]   [PubMed]  

7. N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010). [CrossRef]   [PubMed]  

8. P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

9. F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012). [CrossRef]  

10. S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011). [CrossRef]  

11. Z. Song, K. Wang, J. Li, and Q. H. Liu, “Broadband tunable terahertz absorber based on vanadium dioxide metamaterials,” Opt. Express 26(6), 7148–7154 (2018). [CrossRef]   [PubMed]  

12. S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015). [CrossRef]  

13. J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018). [CrossRef]   [PubMed]  

14. X. Huang, W. He, F. Yang, J. Ran, B. Gao, and W. L. Zhang, “Polarization-independent and angle-insensitive broadband absorber with a target-patterned graphene layer in the terahertz regime,” Opt. Express 26(20), 25558–25566 (2018). [CrossRef]   [PubMed]  

15. Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018). [CrossRef]   [PubMed]  

16. S. Liu, H. Chen, and T. J. Cui, “A broadband terahertz absorber using multi-layer stacked bars,” Appl. Phys. Lett. 106(15), 151601 (2015). [CrossRef]  

17. Y. Shi, Y. C. Li, T. Hao, L. Li, and C. Liang, “A design of ultra-broadband metamaterial absorber,” Wave Random Complex 27(2), 381–391 (2017). [CrossRef]  

18. Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).

19. M. Gil, J. Bonache, and F. Martin, “Metamaterial filters: A review,” Metamaterials (Amst.) 2(4), 186–197 (2008). [CrossRef]  

20. K. Chen, R. Adato, and H. Altug, “Dual-band perfect absorber for multispectral plasmon-enhanced infrared spectroscopy,” ACS Nano 6(9), 7998–8006 (2012). [CrossRef]   [PubMed]  

21. Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015). [CrossRef]   [PubMed]  

22. J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018). [CrossRef]  

23. Z. Song, Z. Wang, and M. Wei, “Broadband tunable absorber for terahertz waves based on isotropic silicon metasurfaces,” Mater. Lett. 234, 138–141 (2019). [CrossRef]  

24. X. He, “Tunable terahertz graphene metamaterials,” Carbon 82, 229–237 (2015). [CrossRef]  

25. A. Vakil and N. Engheta, “Transformation optics using graphene,” Science 332(6035), 1291–1294 (2011). [CrossRef]   [PubMed]  

26. Y. Chen, J. Yao, Z. Song, L. Ye, G. Cai, and Q. H. Liu, “Independent tuning of double plasmonic waves in a free-standing graphene-spacer-grating-spacer-graphene hybrid slab,” Opt. Express 24(15), 16961–16972 (2016). [CrossRef]   [PubMed]  

27. Y. Zhang, Y. Shi, and C. Liang, “Broadband tunable graphene-based metamaterial absorber,” Opt. Mater. Express 6(9), 3036–3044 (2016). [CrossRef]  

28. L. Ye, Y. Chen, G. Cai, N. Liu, J. Zhu, Z. Song, and Q. H. Liu, “Broadband absorber with periodically sinusoidally-patterned graphene layer in terahertz range,” Opt. Express 25(10), 11223–11232 (2017). [CrossRef]   [PubMed]  

29. Y. Zhao, B. Li, C. Lan, K. Bi, and Z. Qu, “Tunable silicon-based all-dielectric metamaterials with strontium titanate thin film in terahertz range,” Opt. Express 25(18), 22158–22163 (2017). [CrossRef]   [PubMed]  

30. J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011). [CrossRef]  

31. R. Singh, A. K. Azad, Q. X. Jia, A. J. Taylor, and H. T. Chen, “Thermal tunability in terahertz metamaterials fabricated on strontium titanate single-crystal substrates,” Opt. Lett. 36(7), 1230–1232 (2011). [CrossRef]   [PubMed]  

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33. H. Nĕmec, P. Kuzel, L. Duvillaret, A. Pashkin, M. Dressel, and M. T. Sebastian, “Highly tunable photonic crystal filter for the terahertz range,” Opt. Lett. 30(5), 549–551 (2005). [CrossRef]   [PubMed]  

34. L. P. Wang and Z. M. Zhang, “Resonance transmission or absorption in deep gratings explained by magnetic polaritons,” Appl. Phys. Lett. 95(11), 111904 (2009). [CrossRef]  

References

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  1. J. Y. Suen, K. Fan, W. J. Padilla, and X. Liu, “All-dielectric metasurface absorbers for uncooled terahertz imaging,” Optica 4(6), 601 (2017).
    [Crossref]
  2. C. M. Watts, X. Liu, and W. J. Padilla, “Metamaterial electromagnetic wave absorbers,” Adv. Mater. 24(23), OP98–OP120 (2012).
    [PubMed]
  3. T. K. Todorov, K. B. Reuter, and D. B. Mitzi, “High-efficiency solar cell with Earth-abundant liquid-processed absorber,” Adv. Mater. 22(20), E156–E159 (2010).
    [Crossref] [PubMed]
  4. L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
    [Crossref] [PubMed]
  5. N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008).
    [Crossref] [PubMed]
  6. X. Liu, C. Lan, B. Li, Q. Zhao, and J. Zhou, “Dual band metamaterial perfect absorber based on artificial dielectric “molecules”,” Sci. Rep. 6(1), 28906 (2016).
    [Crossref] [PubMed]
  7. N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010).
    [Crossref] [PubMed]
  8. P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).
  9. F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012).
    [Crossref]
  10. S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
    [Crossref]
  11. Z. Song, K. Wang, J. Li, and Q. H. Liu, “Broadband tunable terahertz absorber based on vanadium dioxide metamaterials,” Opt. Express 26(6), 7148–7154 (2018).
    [Crossref] [PubMed]
  12. S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
    [Crossref]
  13. J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
    [Crossref] [PubMed]
  14. X. Huang, W. He, F. Yang, J. Ran, B. Gao, and W. L. Zhang, “Polarization-independent and angle-insensitive broadband absorber with a target-patterned graphene layer in the terahertz regime,” Opt. Express 26(20), 25558–25566 (2018).
    [Crossref] [PubMed]
  15. Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
    [Crossref] [PubMed]
  16. S. Liu, H. Chen, and T. J. Cui, “A broadband terahertz absorber using multi-layer stacked bars,” Appl. Phys. Lett. 106(15), 151601 (2015).
    [Crossref]
  17. Y. Shi, Y. C. Li, T. Hao, L. Li, and C. Liang, “A design of ultra-broadband metamaterial absorber,” Wave Random Complex 27(2), 381–391 (2017).
    [Crossref]
  18. Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).
  19. M. Gil, J. Bonache, and F. Martin, “Metamaterial filters: A review,” Metamaterials (Amst.) 2(4), 186–197 (2008).
    [Crossref]
  20. K. Chen, R. Adato, and H. Altug, “Dual-band perfect absorber for multispectral plasmon-enhanced infrared spectroscopy,” ACS Nano 6(9), 7998–8006 (2012).
    [Crossref] [PubMed]
  21. Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015).
    [Crossref] [PubMed]
  22. J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018).
    [Crossref]
  23. Z. Song, Z. Wang, and M. Wei, “Broadband tunable absorber for terahertz waves based on isotropic silicon metasurfaces,” Mater. Lett. 234, 138–141 (2019).
    [Crossref]
  24. X. He, “Tunable terahertz graphene metamaterials,” Carbon 82, 229–237 (2015).
    [Crossref]
  25. A. Vakil and N. Engheta, “Transformation optics using graphene,” Science 332(6035), 1291–1294 (2011).
    [Crossref] [PubMed]
  26. Y. Chen, J. Yao, Z. Song, L. Ye, G. Cai, and Q. H. Liu, “Independent tuning of double plasmonic waves in a free-standing graphene-spacer-grating-spacer-graphene hybrid slab,” Opt. Express 24(15), 16961–16972 (2016).
    [Crossref] [PubMed]
  27. Y. Zhang, Y. Shi, and C. Liang, “Broadband tunable graphene-based metamaterial absorber,” Opt. Mater. Express 6(9), 3036–3044 (2016).
    [Crossref]
  28. L. Ye, Y. Chen, G. Cai, N. Liu, J. Zhu, Z. Song, and Q. H. Liu, “Broadband absorber with periodically sinusoidally-patterned graphene layer in terahertz range,” Opt. Express 25(10), 11223–11232 (2017).
    [Crossref] [PubMed]
  29. Y. Zhao, B. Li, C. Lan, K. Bi, and Z. Qu, “Tunable silicon-based all-dielectric metamaterials with strontium titanate thin film in terahertz range,” Opt. Express 25(18), 22158–22163 (2017).
    [Crossref] [PubMed]
  30. J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
    [Crossref]
  31. R. Singh, A. K. Azad, Q. X. Jia, A. J. Taylor, and H. T. Chen, “Thermal tunability in terahertz metamaterials fabricated on strontium titanate single-crystal substrates,” Opt. Lett. 36(7), 1230–1232 (2011).
    [Crossref] [PubMed]
  32. P. Kužel and F. Kadlec, “Tunable structures and modulators for THz light,” C. R. Phys. 9(2), 197–214 (2008).
    [Crossref]
  33. H. Nĕmec, P. Kuzel, L. Duvillaret, A. Pashkin, M. Dressel, and M. T. Sebastian, “Highly tunable photonic crystal filter for the terahertz range,” Opt. Lett. 30(5), 549–551 (2005).
    [Crossref] [PubMed]
  34. L. P. Wang and Z. M. Zhang, “Resonance transmission or absorption in deep gratings explained by magnetic polaritons,” Appl. Phys. Lett. 95(11), 111904 (2009).
    [Crossref]

2019 (1)

Z. Song, Z. Wang, and M. Wei, “Broadband tunable absorber for terahertz waves based on isotropic silicon metasurfaces,” Mater. Lett. 234, 138–141 (2019).
[Crossref]

2018 (6)

J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018).
[Crossref]

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

X. Huang, W. He, F. Yang, J. Ran, B. Gao, and W. L. Zhang, “Polarization-independent and angle-insensitive broadband absorber with a target-patterned graphene layer in the terahertz regime,” Opt. Express 26(20), 25558–25566 (2018).
[Crossref] [PubMed]

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Z. Song, K. Wang, J. Li, and Q. H. Liu, “Broadband tunable terahertz absorber based on vanadium dioxide metamaterials,” Opt. Express 26(6), 7148–7154 (2018).
[Crossref] [PubMed]

Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).

2017 (4)

2016 (3)

2015 (4)

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

S. Liu, H. Chen, and T. J. Cui, “A broadband terahertz absorber using multi-layer stacked bars,” Appl. Phys. Lett. 106(15), 151601 (2015).
[Crossref]

X. He, “Tunable terahertz graphene metamaterials,” Carbon 82, 229–237 (2015).
[Crossref]

Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015).
[Crossref] [PubMed]

2014 (1)

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

2012 (3)

C. M. Watts, X. Liu, and W. J. Padilla, “Metamaterial electromagnetic wave absorbers,” Adv. Mater. 24(23), OP98–OP120 (2012).
[PubMed]

F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012).
[Crossref]

K. Chen, R. Adato, and H. Altug, “Dual-band perfect absorber for multispectral plasmon-enhanced infrared spectroscopy,” ACS Nano 6(9), 7998–8006 (2012).
[Crossref] [PubMed]

2011 (4)

A. Vakil and N. Engheta, “Transformation optics using graphene,” Science 332(6035), 1291–1294 (2011).
[Crossref] [PubMed]

J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
[Crossref]

R. Singh, A. K. Azad, Q. X. Jia, A. J. Taylor, and H. T. Chen, “Thermal tunability in terahertz metamaterials fabricated on strontium titanate single-crystal substrates,” Opt. Lett. 36(7), 1230–1232 (2011).
[Crossref] [PubMed]

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

2010 (2)

N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010).
[Crossref] [PubMed]

T. K. Todorov, K. B. Reuter, and D. B. Mitzi, “High-efficiency solar cell with Earth-abundant liquid-processed absorber,” Adv. Mater. 22(20), E156–E159 (2010).
[Crossref] [PubMed]

2009 (1)

L. P. Wang and Z. M. Zhang, “Resonance transmission or absorption in deep gratings explained by magnetic polaritons,” Appl. Phys. Lett. 95(11), 111904 (2009).
[Crossref]

2008 (3)

P. Kužel and F. Kadlec, “Tunable structures and modulators for THz light,” C. R. Phys. 9(2), 197–214 (2008).
[Crossref]

N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008).
[Crossref] [PubMed]

M. Gil, J. Bonache, and F. Martin, “Metamaterial filters: A review,” Metamaterials (Amst.) 2(4), 186–197 (2008).
[Crossref]

2005 (1)

Adato, R.

K. Chen, R. Adato, and H. Altug, “Dual-band perfect absorber for multispectral plasmon-enhanced infrared spectroscopy,” ACS Nano 6(9), 7998–8006 (2012).
[Crossref] [PubMed]

Altug, H.

K. Chen, R. Adato, and H. Altug, “Dual-band perfect absorber for multispectral plasmon-enhanced infrared spectroscopy,” ACS Nano 6(9), 7998–8006 (2012).
[Crossref] [PubMed]

Averitt, R. D.

J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018).
[Crossref]

Azad, A. K.

Besteiro, L. V.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Bi, K.

Bonache, J.

M. Gil, J. Bonache, and F. Martin, “Metamaterial filters: A review,” Metamaterials (Amst.) 2(4), 186–197 (2008).
[Crossref]

Cai, G.

Chatzakis, I.

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

Chen, H.

S. Liu, H. Chen, and T. J. Cui, “A broadband terahertz absorber using multi-layer stacked bars,” Appl. Phys. Lett. 106(15), 151601 (2015).
[Crossref]

Chen, H. T.

Chen, K.

K. Chen, R. Adato, and H. Altug, “Dual-band perfect absorber for multispectral plasmon-enhanced infrared spectroscopy,” ACS Nano 6(9), 7998–8006 (2012).
[Crossref] [PubMed]

Chen, S.

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

Chen, Y.

Chen, Z.

J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
[Crossref]

Cheng, H.

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

Cui, T. J.

S. Liu, H. Chen, and T. J. Cui, “A broadband terahertz absorber using multi-layer stacked bars,” Appl. Phys. Lett. 106(15), 151601 (2015).
[Crossref]

Cui, Y.

F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012).
[Crossref]

Ding, F.

F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012).
[Crossref]

Dressel, M.

Duan, G.

J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018).
[Crossref]

Duan, X.

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

Duvillaret, L.

Engheta, N.

A. Vakil and N. Engheta, “Transformation optics using graphene,” Science 332(6035), 1291–1294 (2011).
[Crossref] [PubMed]

Fan, K.

Fan, X.

Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015).
[Crossref] [PubMed]

Fu, L.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Gao, B.

Ge, X.

F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012).
[Crossref]

Giessen, H.

N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010).
[Crossref] [PubMed]

Gil, M.

M. Gil, J. Bonache, and F. Martin, “Metamaterial filters: A review,” Metamaterials (Amst.) 2(4), 186–197 (2008).
[Crossref]

Govorov, A. O.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Gu, C.

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

Gu, J.

J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
[Crossref]

Guo, C.

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

Han, J.

J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
[Crossref]

Hao, T.

Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).

Y. Shi, Y. C. Li, T. Hao, L. Li, and C. Liang, “A design of ultra-broadband metamaterial absorber,” Wave Random Complex 27(2), 381–391 (2017).
[Crossref]

He, S.

F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012).
[Crossref]

He, W.

He, X.

X. He, “Tunable terahertz graphene metamaterials,” Carbon 82, 229–237 (2015).
[Crossref]

Hentschel, M.

N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010).
[Crossref] [PubMed]

Huang, X.

Huang, Y.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Jagadish, C.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Jia, Q. X.

Jiang, W.

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

Jin, Y.

F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012).
[Crossref]

Kadlec, F.

P. Kužel and F. Kadlec, “Tunable structures and modulators for THz light,” C. R. Phys. 9(2), 197–214 (2008).
[Crossref]

Koschny, T.

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

Kuzel, P.

Kužel, P.

P. Kužel and F. Kadlec, “Tunable structures and modulators for THz light,” C. R. Phys. 9(2), 197–214 (2008).
[Crossref]

Lan, C.

Y. Zhao, B. Li, C. Lan, K. Bi, and Z. Qu, “Tunable silicon-based all-dielectric metamaterials with strontium titanate thin film in terahertz range,” Opt. Express 25(18), 22158–22163 (2017).
[Crossref] [PubMed]

X. Liu, C. Lan, B. Li, Q. Zhao, and J. Zhou, “Dual band metamaterial perfect absorber based on artificial dielectric “molecules”,” Sci. Rep. 6(1), 28906 (2016).
[Crossref] [PubMed]

Landy, N. I.

N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008).
[Crossref] [PubMed]

Li, B.

Y. Zhao, B. Li, C. Lan, K. Bi, and Z. Qu, “Tunable silicon-based all-dielectric metamaterials with strontium titanate thin film in terahertz range,” Opt. Express 25(18), 22158–22163 (2017).
[Crossref] [PubMed]

X. Liu, C. Lan, B. Li, Q. Zhao, and J. Zhou, “Dual band metamaterial perfect absorber based on artificial dielectric “molecules”,” Sci. Rep. 6(1), 28906 (2016).
[Crossref] [PubMed]

Li, J.

Z. Song, K. Wang, J. Li, and Q. H. Liu, “Broadband tunable terahertz absorber based on vanadium dioxide metamaterials,” Opt. Express 26(6), 7148–7154 (2018).
[Crossref] [PubMed]

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

Li, L.

Y. Shi, Y. C. Li, T. Hao, L. Li, and C. Liang, “A design of ultra-broadband metamaterial absorber,” Wave Random Complex 27(2), 381–391 (2017).
[Crossref]

Li, Y. C.

Y. Shi, Y. C. Li, T. Hao, L. Li, and C. Liang, “A design of ultra-broadband metamaterial absorber,” Wave Random Complex 27(2), 381–391 (2017).
[Crossref]

Liang, C.

Y. Shi, Y. C. Li, T. Hao, L. Li, and C. Liang, “A design of ultra-broadband metamaterial absorber,” Wave Random Complex 27(2), 381–391 (2017).
[Crossref]

Y. Zhang, Y. Shi, and C. Liang, “Broadband tunable graphene-based metamaterial absorber,” Opt. Mater. Express 6(9), 3036–3044 (2016).
[Crossref]

Liu, C.

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Liu, K.

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

Liu, N.

L. Ye, Y. Chen, G. Cai, N. Liu, J. Zhu, Z. Song, and Q. H. Liu, “Broadband absorber with periodically sinusoidally-patterned graphene layer in terahertz range,” Opt. Express 25(10), 11223–11232 (2017).
[Crossref] [PubMed]

N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010).
[Crossref] [PubMed]

Liu, Q. H.

Liu, S.

S. Liu, H. Chen, and T. J. Cui, “A broadband terahertz absorber using multi-layer stacked bars,” Appl. Phys. Lett. 106(15), 151601 (2015).
[Crossref]

Liu, X.

J. Y. Suen, K. Fan, W. J. Padilla, and X. Liu, “All-dielectric metasurface absorbers for uncooled terahertz imaging,” Optica 4(6), 601 (2017).
[Crossref]

X. Liu, C. Lan, B. Li, Q. Zhao, and J. Zhou, “Dual band metamaterial perfect absorber based on artificial dielectric “molecules”,” Sci. Rep. 6(1), 28906 (2016).
[Crossref] [PubMed]

C. M. Watts, X. Liu, and W. J. Padilla, “Metamaterial electromagnetic wave absorbers,” Adv. Mater. 24(23), OP98–OP120 (2012).
[PubMed]

Liu, Y.

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Luo, L.

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

Ma, Y.

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

Martin, F.

M. Gil, J. Bonache, and F. Martin, “Metamaterial filters: A review,” Metamaterials (Amst.) 2(4), 186–197 (2008).
[Crossref]

Meng, Z.

Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).

Mesch, M.

N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010).
[Crossref] [PubMed]

Mitzi, D. B.

T. K. Todorov, K. B. Reuter, and D. B. Mitzi, “High-efficiency solar cell with Earth-abundant liquid-processed absorber,” Adv. Mater. 22(20), E156–E159 (2010).
[Crossref] [PubMed]

Mock, J. J.

N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008).
[Crossref] [PubMed]

Nemec, H.

Niesler, F. B.

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

Padilla, W. J.

J. Y. Suen, K. Fan, W. J. Padilla, and X. Liu, “All-dielectric metasurface absorbers for uncooled terahertz imaging,” Optica 4(6), 601 (2017).
[Crossref]

C. M. Watts, X. Liu, and W. J. Padilla, “Metamaterial electromagnetic wave absorbers,” Adv. Mater. 24(23), OP98–OP120 (2012).
[PubMed]

N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008).
[Crossref] [PubMed]

Pashkin, A.

Qin, S.

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

Qu, Z.

Ran, J.

Reuter, K. B.

T. K. Todorov, K. B. Reuter, and D. B. Mitzi, “High-efficiency solar cell with Earth-abundant liquid-processed absorber,” Adv. Mater. 22(20), E156–E159 (2010).
[Crossref] [PubMed]

Sajuyigbe, S.

N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008).
[Crossref] [PubMed]

Schalch, J.

J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018).
[Crossref]

Sebastian, M. T.

Shen, H.

Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).

Shi, Y.

Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).

Y. Shi, Y. C. Li, T. Hao, L. Li, and C. Liang, “A design of ultra-broadband metamaterial absorber,” Wave Random Complex 27(2), 381–391 (2017).
[Crossref]

Y. Zhang, Y. Shi, and C. Liang, “Broadband tunable graphene-based metamaterial absorber,” Opt. Mater. Express 6(9), 3036–3044 (2016).
[Crossref]

Simons, R. N.

Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015).
[Crossref] [PubMed]

Singh, R.

Smith, D. R.

N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008).
[Crossref] [PubMed]

Song, Z.

Soukoulis, C. M.

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

Suen, J. Y.

Tan, H. H.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Taylor, A. J.

Tian, J.

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

Tian, Z.

J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
[Crossref]

Todorov, T. K.

T. K. Todorov, K. B. Reuter, and D. B. Mitzi, “High-efficiency solar cell with Earth-abundant liquid-processed absorber,” Adv. Mater. 22(20), E156–E159 (2010).
[Crossref] [PubMed]

Vakil, A.

A. Vakil and N. Engheta, “Transformation optics using graphene,” Science 332(6035), 1291–1294 (2011).
[Crossref] [PubMed]

Wang, J.

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

Wang, K.

Wang, L. P.

L. P. Wang and Z. M. Zhang, “Resonance transmission or absorption in deep gratings explained by magnetic polaritons,” Appl. Phys. Lett. 95(11), 111904 (2009).
[Crossref]

Wang, Z.

Z. Song, Z. Wang, and M. Wei, “Broadband tunable absorber for terahertz waves based on isotropic silicon metasurfaces,” Mater. Lett. 234, 138–141 (2019).
[Crossref]

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Watts, C. M.

C. M. Watts, X. Liu, and W. J. Padilla, “Metamaterial electromagnetic wave absorbers,” Adv. Mater. 24(23), OP98–OP120 (2012).
[PubMed]

Wegener, M.

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

Wei, M.

Z. Song, Z. Wang, and M. Wei, “Broadband tunable absorber for terahertz waves based on isotropic silicon metasurfaces,” Mater. Lett. 234, 138–141 (2019).
[Crossref]

Weiss, T.

N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010).
[Crossref] [PubMed]

Wiederrecht, G. P.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Wilson, J. D.

Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015).
[Crossref] [PubMed]

Wu, D.

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Wu, J.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Xiao, J. Q.

Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015).
[Crossref] [PubMed]

Xie, L.

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

Xie, Y.

Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015).
[Crossref] [PubMed]

Xu, W.

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

Xu, Z.

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Yang, F.

Yang, H.

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

Yang, J.

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).

Yao, J.

Ye, H.

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Ye, L.

Yin, G.

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

Yin, S.

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

Ying, Y.

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

Yu, L.

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Yu, P.

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

Yu, Z.

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Yuan, J.

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

Yuan, X.

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

Zhang, J.

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

Zhang, W.

J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
[Crossref]

Zhang, W. L.

Zhang, X.

J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018).
[Crossref]

Zhang, Y.

Zhang, Z. M.

L. P. Wang and Z. M. Zhang, “Resonance transmission or absorption in deep gratings explained by magnetic polaritons,” Appl. Phys. Lett. 95(11), 111904 (2009).
[Crossref]

Zhao, Q.

X. Liu, C. Lan, B. Li, Q. Zhao, and J. Zhou, “Dual band metamaterial perfect absorber based on artificial dielectric “molecules”,” Sci. Rep. 6(1), 28906 (2016).
[Crossref] [PubMed]

Zhao, X.

J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018).
[Crossref]

Zhao, Y.

Zhou, J.

X. Liu, C. Lan, B. Li, Q. Zhao, and J. Zhou, “Dual band metamaterial perfect absorber based on artificial dielectric “molecules”,” Sci. Rep. 6(1), 28906 (2016).
[Crossref] [PubMed]

Zhu, J.

L. Ye, Y. Chen, G. Cai, N. Liu, J. Zhu, Z. Song, and Q. H. Liu, “Broadband absorber with periodically sinusoidally-patterned graphene layer in terahertz range,” Opt. Express 25(10), 11223–11232 (2017).
[Crossref] [PubMed]

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
[Crossref]

Zhu, Z.

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

ACS Nano (1)

K. Chen, R. Adato, and H. Altug, “Dual-band perfect absorber for multispectral plasmon-enhanced infrared spectroscopy,” ACS Nano 6(9), 7998–8006 (2012).
[Crossref] [PubMed]

Adv. Mater. (2)

C. M. Watts, X. Liu, and W. J. Padilla, “Metamaterial electromagnetic wave absorbers,” Adv. Mater. 24(23), OP98–OP120 (2012).
[PubMed]

T. K. Todorov, K. B. Reuter, and D. B. Mitzi, “High-efficiency solar cell with Earth-abundant liquid-processed absorber,” Adv. Mater. 22(20), E156–E159 (2010).
[Crossref] [PubMed]

Appl. Phys. Lett. (6)

F. Ding, Y. Cui, X. Ge, Y. Jin, and S. He, “Ultra-broadband microwave metamaterial absorber,” Appl. Phys. Lett. 100(10), 103506 (2012).
[Crossref]

S. Chen, H. Cheng, H. Yang, J. Li, X. Duan, C. Gu, and J. Tian, “Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime,” Appl. Phys. Lett. 99(25), 253104 (2011).
[Crossref]

S. Yin, J. Zhu, W. Xu, W. Jiang, J. Yuan, G. Yin, L. Xie, Y. Ying, and Y. Ma, “High-performance terahertz wave absorbers made of silicon-based metamaterials,” Appl. Phys. Lett. 107(7), 073903 (2015).
[Crossref]

S. Liu, H. Chen, and T. J. Cui, “A broadband terahertz absorber using multi-layer stacked bars,” Appl. Phys. Lett. 106(15), 151601 (2015).
[Crossref]

J. Schalch, G. Duan, X. Zhao, X. Zhang, and R. D. Averitt, “Terahertz metamaterial perfect absorber with continuously tunable air spacer layer,” Appl. Phys. Lett. 113(6), 061113 (2018).
[Crossref]

L. P. Wang and Z. M. Zhang, “Resonance transmission or absorption in deep gratings explained by magnetic polaritons,” Appl. Phys. Lett. 95(11), 111904 (2009).
[Crossref]

C. R. Phys. (1)

P. Kužel and F. Kadlec, “Tunable structures and modulators for THz light,” C. R. Phys. 9(2), 197–214 (2008).
[Crossref]

Carbon (1)

X. He, “Tunable terahertz graphene metamaterials,” Carbon 82, 229–237 (2015).
[Crossref]

Mater. Lett. (1)

Z. Song, Z. Wang, and M. Wei, “Broadband tunable absorber for terahertz waves based on isotropic silicon metasurfaces,” Mater. Lett. 234, 138–141 (2019).
[Crossref]

Mater. Sci. (1)

Y. Shi, J. Yang, H. Shen, Z. Meng, and T. Hao, “Design of broadband metamaterial-based ferromagnetic absorber,” Mater. Sci. 2, 1–7 (2018).

Metamaterials (Amst.) (1)

M. Gil, J. Bonache, and F. Martin, “Metamaterial filters: A review,” Metamaterials (Amst.) 2(4), 186–197 (2008).
[Crossref]

Nano Lett. (1)

N. Liu, M. Mesch, T. Weiss, M. Hentschel, and H. Giessen, “Infrared perfect absorber and its application as plasmonic sensor,” Nano Lett. 10(7), 2342–2348 (2010).
[Crossref] [PubMed]

Nanoscale Res. Lett. (1)

Z. Xu, D. Wu, Y. Liu, C. Liu, Z. Yu, L. Yu, and H. Ye, “Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons,” Nanoscale Res. Lett. 13(1), 143 (2018).
[Crossref] [PubMed]

Nat. Commun. (1)

L. Luo, I. Chatzakis, J. Wang, F. B. Niesler, M. Wegener, T. Koschny, and C. M. Soukoulis, “Broadband terahertz generation from metamaterials,” Nat. Commun. 5(1), 3055 (2014).
[Crossref] [PubMed]

Opt. Commun. (1)

J. Zhu, J. Han, Z. Tian, J. Gu, Z. Chen, and W. Zhang, “Thermal broadband tunable terahertz metamaterials,” Opt. Commun. 284(12), 3129–3133 (2011).
[Crossref]

Opt. Express (5)

Opt. Lett. (2)

Opt. Mater. Express (1)

Optica (1)

Phys. Rev. Lett. (1)

N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, “Perfect metamaterial absorber,” Phys. Rev. Lett. 100(20), 207402 (2008).
[Crossref] [PubMed]

Sci. Rep. (3)

X. Liu, C. Lan, B. Li, Q. Zhao, and J. Zhou, “Dual band metamaterial perfect absorber based on artificial dielectric “molecules”,” Sci. Rep. 6(1), 28906 (2016).
[Crossref] [PubMed]

J. Yang, Z. Zhu, J. Zhang, C. Guo, W. Xu, K. Liu, X. Yuan, and S. Qin, “Broadband terahertz absorber based on multi-band continuous plasmon resonances in geometrically gradient dielectric-loaded graphene plasmon structure,” Sci. Rep. 8(1), 3239 (2018).
[Crossref] [PubMed]

Y. Xie, X. Fan, J. D. Wilson, R. N. Simons, Y. Chen, and J. Q. Xiao, “A universal electromagnetic energy conversion adapter based on a metamaterial absorber,” Sci. Rep. 4(1), 6301 (2015).
[Crossref] [PubMed]

Science (1)

A. Vakil and N. Engheta, “Transformation optics using graphene,” Science 332(6035), 1291–1294 (2011).
[Crossref] [PubMed]

Wave Random Complex (1)

Y. Shi, Y. C. Li, T. Hao, L. Li, and C. Liang, “A design of ultra-broadband metamaterial absorber,” Wave Random Complex 27(2), 381–391 (2017).
[Crossref]

Other (1)

P. Yu, L. V. Besteiro, Y. Huang, J. Wu, L. Fu, H. H. Tan, C. Jagadish, G. P. Wiederrecht, A. O. Govorov, and Z. Wang, “Broadband Metamaterial Absorbers,” Adv. Opt. Mater.1800995 (2018).

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Figures (8)

Fig. 1
Fig. 1 Proposed tunable terahertz absorber with a classical sandwiched structure consisted of metallic top layer and ground plane, spaced by STO material film. (a) Schematic presentation of the geometrical parameters in the unit cell. (b) Top view of the unit cell. (c) Schematic of the absorber. The corresponding geometry parameters are set as (unit: μm): P x = P y =98, R=25, H=2, m=n=0.2.
Fig. 2
Fig. 2 Absorption spectra of the absorber under normal incidence with the primary temperature 400K in the TE mode.
Fig. 3
Fig. 3 The permittivity of STO material at different frequencies (1.5 to 3 THz) and temperatures (from 400 to 200K), (a) Real part of the permittivity, (b)The losses tanδ, (c) Real part of the permittivity changing with temperature at the resonance frequency of 2.48 THz.
Fig. 4
Fig. 4 Absorption spectra of the absorber with different temperature 200K, 250K, 300K, 350K, and 400K under normal incidence.
Fig. 5
Fig. 5 Electric field distribution of the proposed absorber at the resonance frequency 2.48 THz. (a) For the TE mode in the x-y plane. (b) For the TM mode in the x-y plane. (c) normal incidence of incidence wave, along the E z direction.
Fig. 6
Fig. 6 Surface current distribution at the peak absorption frequency point 2.48 THz with the temperature 400K. (a) Current on the back ground layer. (b) Current on the top layer.
Fig. 7
Fig. 7 Electric field distribution at different frequency points of 2.48, 2.33, 2.13, 1.94, 1.71 THz, when the temperature is set as 400, 350, 300, 250, 200 K, respectively.
Fig. 8
Fig. 8 Absorption contour map of the absorber as a function of incidence angle and frequency under oblique incidence angels from 0° to 80° with a step width 10°. (a) TE mode. (b) TM mode.

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

ε w = ε + f ω 0 2 ω 2 iωγ
ω 0 (T)[ cm -1 ]= 31.2(T42.5)
γ(T)[ cm -1 ]=3.3+0.094T

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