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Proceedings Paper

Flat dielectric grating focusing lens with TE-polarized incident light
Author(s): Ting Ma; Xiao-dong Yuan; Wei-min Ye; Wei Xu
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Paper Abstract

We introduce a planar, high focusing ability, low loss lens using subwavelength high contrast grating (HCG). After a plane wave passes through the 21.7μm wide HCG lens, it is focused 9.51μm below the lens, resulting an NA of 75%. At the focal plane, it presents a full-width-half-maximum (FWHM) of 0.95μm, which is extremely close to diffraction limit. The transmittance is 88%, which means that the loss due to reflection and absorption is only 12%. HCG focusing optics is defined by one-step photolithography and thus can be readily integrated with many devices including VCSELs, telescopes, CCDs and solar cells.

Paper Details

Date Published: 23 August 2013
PDF: 9 pages
Proc. SPIE 8911, International Symposium on Photoelectronic Detection and Imaging 2013: Micro/Nano Optical Imaging Technologies and Applications, 89110C (23 August 2013); doi: 10.1117/12.2034064
Show Author Affiliations
Ting Ma, National Univ. of Defense Technology (China)
Xiao-dong Yuan, National Univ. of Defense Technology (China)
Wei-min Ye, National Univ. of Defense Technology (China)
Wei Xu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 8911:
International Symposium on Photoelectronic Detection and Imaging 2013: Micro/Nano Optical Imaging Technologies and Applications
Min Gu; Xiaocong Yuan; Min Qiu, Editor(s)

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