Digital holography for spatially resolved analysis of the semiconductor optical response.
Appl Opt
; 60(4): A15-A20, 2021 Feb 01.
Article
en En
| MEDLINE
| ID: mdl-33690349
ABSTRACT
We present spatially resolved measurements of the below-band-gap carrier-induced absorption and concurrent phase change in a semiconductor with the help of transmission digital holography. The application is demonstrated for a bulk GaAs sample, while the holograms are recorded with a conventional CMOS sensor. We show that the phase information enables spatially resolved monitoring of excess carrier distributions. Based on that, we discuss a phase-based approach for separation of carrier and heat related effects in the semiconductor optical response.
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Appl Opt
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2021
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Article