Enhanced quantum efficiency and reduction of reflection for MSM photodetectors with nano-structured surface
Ekaterina Ponizovskaya Devine (1), Yang Gao (1), Cesar Perez (1),, Toshishige Yamada (2), Aly F. Elrefaie (2), M.Saif Islam (1), Shih-Yuan Wang, (2) ((1) Electrical, Computer Engineering UC Davis Davis, (2) W&WSens, Device Inc Los Altos)
TL;DR
This paper presents nano-structured surface designs for MSM photodetectors that significantly improve quantum efficiency and reduce reflection by trapping photons and redirecting incident light into the absorbing layer.
Contribution
It introduces photon trapping nano-structures that enhance efficiency and reduce reflection in MSM photodetectors operating at 800-950nm.
Findings
Increased quantum efficiency due to nano-structures
Reduced reflection through micro-hole design
Enhanced light absorption in the photodetectors
Abstract
The photon trapping nano-structures help to enhance quantum efficiency and reduce reflection for MSM photodetector that allows fast Si photodetectors at wavelength 800-950nm. The nanostructure consist of micro holes reduces reflection and bends normally incident light into the lateral modes in the absorbing layer.
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Taxonomy
TopicsNanowire Synthesis and Applications · Photonic and Optical Devices · Optical Coatings and Gratings