Electromagnetic modelization of spherical focusing on a one-dimensional grating thanks to a conical B-spline modal method

被引：13

作者：

Chevalier, Paul ^{[1
,2
]}

Bouchon, Patrick ^{[2
]}

Pardo, Fabrice ^{[1
]}

Haidar, Riad ^{[2
,3
]}

机构：

[1] Lab Photon & Nanostruct LPN CNRS, F-91460 Marcoussis, France

[2] French Aerosp Lab, ONERA, F-91761 Palaiseau, France

[3] Ecole Polytech, Dept Phys, F-91128 Palaiseau, France

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2014年 / 31卷 / 08期

关键词：

COUPLED-WAVE METHOD; EFFICIENT IMPLEMENTATION; DIFFRACTION GRATINGS; LAMELLAR GRATINGS; FORMULATION; CONVERGENCE; PLASMONICS; EXPANSION;

D O I：

10.1364/JOSAA.31.001692

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Focusing light onto nanostructures thanks to spherical lenses is a first step in enhancing the field and is widely used in applications. Nonetheless, the electromagnetic response of such nanostructures, which have subwavelength patterns, to a focused beam cannot be described by the simple ray tracing formalism. Here, we present a method for computing the response to a focused beam, based on the B-spline modal method adapted to nanostructures in conical mounting. The eigenmodes are computed in each layer for both polarizations and are then combined for the computation of scattering matrices. The simulation of a Gaussian focused beam is obtained thanks to a truncated decomposition into plane waves computed on a single period, which limits the computation burden. (C) 2014 Optical Society of America

引用

页码：1692 / 1697

页数：6

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