ID 113814
Author
Keywords
Subwavelength grating
Waveguide
Dual-wavelength filter
Guided mode
Content Type
Journal Article
Description
A dual-wavelength filter was experimentally demonstrated using subwavelength grating (SWG)/waveguide structure. We designed the structural parameters of the SWG and the waveguide to find the reflection peaks in the visible wavelength region. To investigate the optical response of the designed SWG/waveguide structure, finite-difference time-domain (FDTD) numerical calculations were performed for electromagnetic field distribution. The dual reflection peaks from our proposed structure were predicted in visible wavelength regions by the FDTD calculation. The calculated electromagnetic field distribution also revealed that the reflection peaks were associated with resonances in the SWG and waveguides. We fabricated the SWG/waveguide with typical electron-beam lithography techniques, and two reflection peaks were observed at wavelengths of 486 nm and 590 nm with bandwidths of 45 nm and 58 nm, respectively. These experimental results indicate that dual-wavelength filters can be successfully realized without complex fabrication processes.
Journal Title
Optical Review
ISSN
13499432
Publisher
Springer Japan|The Optical Society of Japan
Volume
26
Issue
5
Start Page
466
End Page
471
Published Date
2019-08-28
Remark
This is a post-peer-review, pre-copyedit version of an article published in Optical Review. The final authenticated version is available online at: https://doi.org/10.1007/s10043-019-00541-3.
論文本文は2020-08-28以降公開予定
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
language
eng
TextVersion
その他
departments
Science and Technology