Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1538306 | Optics Communications | 2010 | 4 Pages |
Abstract
A new application of rugate structures is proposed as low-pass spatial filters for beam smoothing. By using the transfer matrix method to analyze the spatial properties of the bandgap of rugate structures, the low-pass rugate spatial filters with both an almost ideal flat bandpass and a rather steep switching between pass- and stop-bands are designed. The angle-domain bandwidth of the spatial filters can be adjusted by changing the parameters of rugate structures for a given light frequency. The near-field simulations carried out by using the finite-difference time-domain technique confirm the possibility of an efficient light smoothing.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Zhaoming Luo, Shuangchun Wen, Zhixiang Tang, Hailu Luo, Yuanjiang Xiang, Dongmo Song,