Title :
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
fDate :
3/1/2007 12:00:00 AM
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;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.889666
