Abstract

Using the finite-difference time-domain simulation, we show that if a gradient-index or binary planar dielectric microlens that focuses light at the output surface has a near-focus subwavelength slit the focal spot width is determined by the slit width. Notably, the slit allows the output light proportion to be increased due to the surface wave scattering, thus forming a focal spot nearly devoid of side lobes. In this work, the focal spot width of λ/23 and the diffraction efficiency of focusing of 44% are achieved.

© 2013 Optical Society of America

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References

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  1. K. R. Chen, Opt. Lett. 35, 3763 (2010).
    [CrossRef]
  2. S. Ishii, A. V. Kildishev, V. M. Shalaev, K.-P. Chen, and V. P. Drachev, in Conference on Lasers and Electro-Optics (2011).
  3. G. Ren, C. Wang, Z. Zhao, X. Tao, and X. Luo, J. Opt. Soc. Am. B 29, 3103 (2012).
    [CrossRef]
  4. V. R. Almeida, Q. Xu, C. A. Barrios, and M. Lipson, Opt. Lett. 29, 1209 (2004).
    [CrossRef]
  5. H. T. Chien and C. C. Chen, Opt. Express 14, 10759 (2006).
    [CrossRef]
  6. H. Kurt and D. S. Citrin, Opt. Express 15, 1240 (2007).
    [CrossRef]
  7. Z. Cheng, X. Chen, C. Y. Wong, K. Xu, C. K. Y. Fung, Y. M. Chen, and H. K. Tsang, Opt. Lett. 37, 1217 (2012).
    [CrossRef]
  8. G. Ren, Z. Lai, C. Wang, Q. Feng, L. Liu, K. Liu, and X. Luo, Opt. Express 18, 18151 (2010).
    [CrossRef]
  9. G. Li, J. Li, and K. W. Cheah, Appl. Opt. 50, G27 (2011).
    [CrossRef]
  10. V. V. Kotlyar, A. A. Kovalev, A. G. Nalimov, and S. S. Stafeev, Adv. Opt. Technol. 2012, 1 (2012).

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2010

2007

2006

2004

Almeida, V. R.

Barrios, C. A.

Cheah, K. W.

Chen, C. C.

Chen, K. R.

Chen, K.-P.

S. Ishii, A. V. Kildishev, V. M. Shalaev, K.-P. Chen, and V. P. Drachev, in Conference on Lasers and Electro-Optics (2011).

Chen, X.

Chen, Y. M.

Cheng, Z.

Chien, H. T.

Citrin, D. S.

Drachev, V. P.

S. Ishii, A. V. Kildishev, V. M. Shalaev, K.-P. Chen, and V. P. Drachev, in Conference on Lasers and Electro-Optics (2011).

Feng, Q.

Fung, C. K. Y.

Ishii, S.

S. Ishii, A. V. Kildishev, V. M. Shalaev, K.-P. Chen, and V. P. Drachev, in Conference on Lasers and Electro-Optics (2011).

Kildishev, A. V.

S. Ishii, A. V. Kildishev, V. M. Shalaev, K.-P. Chen, and V. P. Drachev, in Conference on Lasers and Electro-Optics (2011).

Kotlyar, V. V.

V. V. Kotlyar, A. A. Kovalev, A. G. Nalimov, and S. S. Stafeev, Adv. Opt. Technol. 2012, 1 (2012).

Kovalev, A. A.

V. V. Kotlyar, A. A. Kovalev, A. G. Nalimov, and S. S. Stafeev, Adv. Opt. Technol. 2012, 1 (2012).

Kurt, H.

Lai, Z.

Li, G.

Li, J.

Lipson, M.

Liu, K.

Liu, L.

Luo, X.

Nalimov, A. G.

V. V. Kotlyar, A. A. Kovalev, A. G. Nalimov, and S. S. Stafeev, Adv. Opt. Technol. 2012, 1 (2012).

Ren, G.

Shalaev, V. M.

S. Ishii, A. V. Kildishev, V. M. Shalaev, K.-P. Chen, and V. P. Drachev, in Conference on Lasers and Electro-Optics (2011).

Stafeev, S. S.

V. V. Kotlyar, A. A. Kovalev, A. G. Nalimov, and S. S. Stafeev, Adv. Opt. Technol. 2012, 1 (2012).

Tao, X.

Tsang, H. K.

Wang, C.

Wong, C. Y.

Xu, K.

Xu, Q.

Zhao, Z.

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Figures (6)

Fig. 1.
Fig. 1.

(Gray-level) refractive index distribution of a HS slit lens: k is the wave vector, and E and H are the electric and magnetic field strength.

Fig. 2.
Fig. 2.

Intensity profile in the focal plane |Ey|2 generated by a slitless lens with the incident TE-wave.

Fig. 3.
Fig. 3.

(a) Focal spot width FWHM as a function of the slit width W1 and the intensity profile I=|Ex|2+|Ez|2 in the focal plane (10 nm after the lens) at W1=50nm, simulated using the (b) FullWave and (c) MEEP software.

Fig. 4.
Fig. 4.

(a) DE ηD and (b) intensity at the lens focus (10 nm apart from the lens) as a function of the slit width W1, at W2=H.

Fig. 5.
Fig. 5.

(a) DE ηD and (b) intensity I in the lens focus as a function of the slit length W2, at W1=50nm.

Fig. 6.
Fig. 6.

(a) Refractive index distribution in a photonic crystal lens with a slit. (b) The instantaneous distribution of the field Ex in such a lens at instance cT=32μm. (c) Intensity profile in the transverse focal plane 10 nm after the lens.

Equations (1)

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Ex(x,z)=exp(iβx)ch[(β2k2)1/2|x|],|x|<a,

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