Flat dielectric grating focusing lens with TE-polarized incident light

Ting Ma; Xiao-dong Yuan; Wei-min Ye; Wei Xu

doi:10.1117/12.2034064

23 August 2013 Flat dielectric grating focusing lens with TE-polarized incident light

Ting Ma, Xiao-dong Yuan, Wei-min Ye, Wei Xu

Proceedings Volume 8911, International Symposium on Photoelectronic Detection and Imaging 2013: Micro/Nano Optical Imaging Technologies and Applications; 89110C (2013) https://doi.org/10.1117/12.2034064
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

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.

Citation Download Citation

Ting Ma, Xiao-dong Yuan, Wei-min Ye, and Wei Xu "Flat dielectric grating focusing lens with TE-polarized incident light", Proc. SPIE 8911, International Symposium on Photoelectronic Detection and Imaging 2013: Micro/Nano Optical Imaging Technologies and Applications, 89110C (23 August 2013); https://doi.org/10.1117/12.2034064

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