Title :
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
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;
Conference_Titel :
Mathematical Methods in Electromagnetic Theory, 2000. MMET 2000. International Conference on
Conference_Location :
Kharkov
Print_ISBN :
0-7803-6347-7
DOI :
10.1109/MMET.2000.890442
