Polarization dependent, plasmon-enhanced infrared transmission through gold nanoslits on monolayer black phosphorus

Guangsheng Deng; Sina Abedini Dereshgi; Xianglian Song; Koray Aydin

doi:10.1364/JOSAB.36.00F109

Journal of the Optical Society of America B
Vol. 36,
Issue 8,
pp. F109-F116
(2019)
•https://doi.org/10.1364/JOSAB.36.00F109

Polarization dependent, plasmon-enhanced infrared transmission through gold nanoslits on monolayer black phosphorus

Guangsheng Deng, Sina Abedini Dereshgi, Xianglian Song, and Koray Aydin

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Guangsheng Deng, Sina Abedini Dereshgi, Xianglian Song, and Koray Aydin, "Polarization dependent, plasmon-enhanced infrared transmission through gold nanoslits on monolayer black phosphorus," J. Opt. Soc. Am. B 36, F109-F116 (2019)

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About this Article
History
- Original Manuscript: March 4, 2019
- Revised Manuscript: April 25, 2019
- Manuscript Accepted: April 25, 2019
- Published: June 11, 2019

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Abstract

Enhanced transmission is essential in many application cases. However, as an ordinary method to enhance wave transmission, traditional extraordinary transmission based on nanohole array structures has no capability to widen its operation bandwidth. Here, we use a continuous monolayer black phosphorus film to enhance transmission through gold nanostructure arrays at the mid-infrared region. By exciting surface plasmon polaritons at the BP/gold nanostructure arrays interface, enhanced transmission over a broad range of wavelengths was theoretically demonstrated. Using finite-difference time-domain simulations, we analyzed the effects of geometric parameters on the transmission spectra and demonstrated unique polarization-dependent transmission enhancement in BP/gold silt arrays and BP/gold patch arrays, which originates from the anisotropic properties of BP. Our work provides new guidance to the design of broadband, polarization-dependent extraordinary transmission enhancement.

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$s$ (nm)	$Δ x$ (nm)	$λ_{SPP}$ (nm)	$λ_{0}$ (μm)	$k_{SPP}$ ( ${nm}^{- 1}$ )	$Im {q_{SPP}}$ ( ${nm}^{- 1}$ )	$m$
40	7	14	5.79	0.4488	0.0319	$34.23 \approx 34$
60	9	18	6.9	0.3491	0.0308	$26.82 \approx 27$
80	10	20	7.86	0.3142	0.0366	$24.11 \approx 24$
100	11	22	8.72	0.2856	0.0353	$21.91 \approx 21$

$p$ (nm)	$Δ x$ (nm)	$λ_{SPP}$ (nm)	$λ_{0}$ (μm)	$k_{SPP}$ ( ${nm}^{- 1}$ )	$Im {q_{SPP}}$ ( ${nm}^{- 1}$ )	$G_{x}$ ( ${nm}^{- 1}$ )	$m$
700	14	28	10.06	0.2244	0.0257	0.009	$24.95 \approx 25$
600	14	28	9.92	0.2244	0.0267	0.011	$21.3 \approx 21$
500	14	28	9.74	0.2244	0.0252	0.013	$17.21 \approx 17$
400	13	26	9.57	0.2417	0.0252	0.016	$15.06 \approx 15$
300	13	26	9.3	0.2417	0.0253	0.021	$12.05 \approx 12$

$s$ (nm)	$Δ x$ (nm)	$λ_{SPP}$ (nm)	$λ_{0}$ (μm)	$k_{SPP}$ ( ${nm}^{- 1}$ )	$Im {q_{SPP}}$ ( ${nm}^{- 1}$ )	$m$
40	7	14	5.79	0.4488	0.0319	$34.23 \approx 34$
60	9	18	6.9	0.3491	0.0308	$26.82 \approx 27$
80	10	20	7.86	0.3142	0.0366	$24.11 \approx 24$
100	11	22	8.72	0.2856	0.0353	$21.91 \approx 21$

$p$ (nm)	$Δ x$ (nm)	$λ_{SPP}$ (nm)	$λ_{0}$ (μm)	$k_{SPP}$ ( ${nm}^{- 1}$ )	$Im {q_{SPP}}$ ( ${nm}^{- 1}$ )	$G_{x}$ ( ${nm}^{- 1}$ )	$m$
700	14	28	10.06	0.2244	0.0257	0.009	$24.95 \approx 25$
600	14	28	9.92	0.2244	0.0267	0.011	$21.3 \approx 21$
500	14	28	9.74	0.2244	0.0252	0.013	$17.21 \approx 17$
400	13	26	9.57	0.2417	0.0252	0.016	$15.06 \approx 15$
300	13	26	9.3	0.2417	0.0253	0.021	$12.05 \approx 12$

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Equations (4)

Journal of the Optical Society of America B