Modal analysis of the quasi-resonant extinction ratio enhancement in the amorphous silicon wire grid polarizer

被引：0
|
作者：
Akhmedzhanov, I. M. [1 ]
Nurligareev, J. Kh. [1 ,2 ]
Usievich, B. A. [1 ]
机构：
[1] Russian Acad Sci, Prokhorov Gen Phys Inst, Vavilov St 38, Moscow, Russia
[2] MIREA Russian Technol Univ, Vernadsky Ave 78, Moscow, Russia
来源：
OPTICS COMMUNICATIONS | 2023年 / 549卷
关键词：
DIFFRACTION; GRATINGS;
D O I：
10.1016/j.optcom.2023.129912
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The previously discovered effect of quasi-resonant enhancement of the extinction ratio in an amorphous silicon wire polarizer is investigated using the Bloch wave approach and the modal method. Effective indices of grating modes, modal fields and transmission coefficients were numerically evaluated and our prior hypothesis of destructive interference of lower order grating modes as a mechanism for the enhancement of the extinction ratio was confirmed. Using the numerical optimi-zation, we showed that the quasi-resonance wavelength can be tuned by changing the parameters of the grating structure.
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页数：5
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