Modeling of Subwavelength Gratings: Near-Field Behavior

被引：1

作者：

Chernyavsky, Alexander ^{[1
,2
]}

Bereza, Alexey ^{[1
]}

Frumin, Leonid ^{[1
]}

Shapiro, David ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Automat & Electrometry, Siberian Branch, 1 Koptyug Ave, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Div Phys, 2 Pirogov Str, Novosibirsk 630090, Russia

来源：

PHOTONICS | 2023年 / 10卷 / 12期

基金：

俄罗斯科学基金会;

关键词：

diffraction; subwavelength grating; near field; parallel cylinders; light scattering; point dipole approximation; numerical modelling; SCATTERING; REFLECTION; DISCRETE; LIGHT;

D O I：

10.3390/photonics10121332

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Subwavelength gratings have received considerable attention in the fields of photonics, optoelectronics, and image sensing. This paper presents simple analytical expressions for the near-field intensity distribution of radiation scattered by these gratings. Our proposed methodology employs a 2D point dipole model and a specialized version of perturbation theory. By validating our models via numerical techniques including boundary and finite element methods, we demonstrate their effectiveness, even for narrow slits.

引用

页数：12

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