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Silicon wire grid polarizer for ultraviolet applications.
Applied Optics
|January 22, 2015
Summary
Researchers developed a silicon wire grid polarizer for ultraviolet light. This novel device operates down to 300 nm, offering efficient polarization for UV applications.
Area of Science:
- Optoelectronics
- Nanophotonics
- Materials Science
Background:
- Wire grid polarizers (WGPs) are crucial optical components for controlling light polarization.
- Traditional WGPs often use metallic materials, limiting their performance in the ultraviolet (UV) spectrum.
- Semiconductors present an alternative material class for UV-compatible WGPs.
Purpose of the Study:
- To demonstrate a silicon-based wire grid polarizer (WGP) capable of operating in the UV spectral range.
- To investigate the feasibility of using amorphous silicon as a grating material for UV WGPs.
- To characterize the performance of the fabricated UV WGP in terms of transmission, extinction ratio, and spectral bandwidth.
Main Methods:
- Fabrication of a WGP using electron beam lithography and dry etching techniques.
