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A simple reflective metalens based on reverse design for an ultra-high-efficiency free space wavelength splitter
- Source :
- Applied Physics Express, Vol 17, Iss 3, p 032003 (2024)
- Publication Year :
- 2024
- Publisher :
- IOP Publishing, 2024.
-
Abstract
- We propose two kinds of high-efficiency free-space wave splitters in the mid-IR band using reverse design. The wavelength divider based on the abnormal reflection principle realizes a beam-splitting angle of 22.00° and 10.92° by controlling the phase distribution, and the reflection efficiency of both wavelengths exceeds 50%. The wavelength divider designed based on the concept of metalens simultaneously accomplishes the functions of focusing and beam splitting. It has a focal length of 100 μ m and a relative focal position of 100 μ m. Most importantly, the focusing efficiency for the two wavelengths reaches an impressive 48.59% and 72.51%, respectively.
- Subjects :
- reverse design
metasurface
free space wavelength splitter
metalens
Physics
QC1-999
Subjects
Details
- Language :
- English
- ISSN :
- 18820786
- Volume :
- 17
- Issue :
- 3
- Database :
- Directory of Open Access Journals
- Journal :
- Applied Physics Express
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.631abe48be994d53ad844e0e7429ab7b
- Document Type :
- article
- Full Text :
- https://doi.org/10.35848/1882-0786/ad2c00