Numerical Study of a High-Resolution Far-Field Scanning Optical Microscope via a Surface Plasmon-Modulated Light Source

Author

Guo, Baoshan ; Gan, Qiaoqiang ; Song, Guofeng ; Gao, Jianxia ; Chen, Lianghui

Author_Institution

Graduate Univ., Beijing

Volume

25

Issue

3

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

830

Lastpage

833

Abstract

In this paper, we analyze light transmission through a single subwavelength slit surrounded by periodic grooves in layered films consisting of Au and dielectric material. A subwavelength grating is scanned numerically by the finite difference time domain method in two dimensions. The results show that the transmission field can be confined to a spot with subwavelength width in the far field and can be useful in the application of a high-resolution far-field scanning optical microscope

Keywords

finite difference time-domain analysis; gold; light sources; metallic thin films; optical microscopes; surface plasmons; far-field scanning optical microscope; finite difference time domain method; subwavelength grating; surface plasmon; Apertures; Biomedical optical imaging; Corrugated surfaces; Finite difference methods; Gallium nitride; Light sources; Optical films; Optical microscopy; Optical surface waves; Plasmons; Finite difference time domain (FDTD) method; scanning optical microscope; surface plasmon subwavelength optics;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2006.889666

Filename

4147702