Numerical evaluation of binary optical elements with subwavelength structures

Author

Fujimoto, Masayuki ; Okuno, Yoichi ; Matsuda, Toyonori

Author_Institution

Dept. of Electr. & Comput. Eng., Kumamoto Univ., Japan

Volume

2

fYear

2000

fDate

2000

Firstpage

393

Abstract

The diffraction characteristics of a diffractive device with binary subwavelength gratings are evaluated by the use of FDTD method. The field patterns are computed for several grating parameters. The transmitted fields are analyzed in terms of the effective refractive indices, which are determined by the duty ratio and grating period and depend on the polarization of the incident light. Numerical results show that the device works as an optical lens

Keywords

diffraction gratings; diffractive optical elements; electromagnetic wave diffraction; finite difference time-domain analysis; lenses; light polarisation; refractive index; FDTD method; binary optical elements; binary subwavelength gratings; diffraction characteristics; diffractive device; duty ratio; effective refractive indices; field patterns; grating parameters; grating period; optical lens; polarization; subwavelength structures; transmitted fields; Diffraction gratings; Educational institutions; Geometrical optics; Lenses; Optical devices; Optical polarization; Optical refraction; Optical variables control; Petroleum; Ultraviolet sources;

fLanguage

English

Publisher

ieee

Conference_Titel

Mathematical Methods in Electromagnetic Theory, 2000. MMET 2000. International Conference on

Conference_Location

Kharkov

ISSN

1

Print_ISBN

0-7803-6347-7

Type

conf

DOI

10.1109/MMET.2000.890442

Filename

890442