Microsecond-resolved SDR-based cavity ring down ellipsometry

We present an experimental apparatus that allows microsecond-resolved ellipsometric and absorption measurements. The apparatus is based on an optical cavity containing a Dove prism, in which light undergoes total internal reflection (TIR), while the data acquisition is based on software defined radi...

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Bibliographic Details
Published inApplied optics. Optical technology and biomedical optics Vol. 54; no. 18; p. 5861
Main Authors Sofikitis, D, Spiliotis, A K, Stamataki, K, Katsoprinakis, G E, Bougas, L, Samartzis, P C, Loppinet, B, Rakitzis, T P, Surligas, M, Papadakis, S
Format Journal Article
LanguageEnglish
Published United States 20.06.2015
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Summary:We present an experimental apparatus that allows microsecond-resolved ellipsometric and absorption measurements. The apparatus is based on an optical cavity containing a Dove prism, in which light undergoes total internal reflection (TIR), while the data acquisition is based on software defined radio technology and custom-built drivers. We demonstrate the ability to sense rapid variations in the refractive index above the TIR interface for arbitrarily long times with a temporal resolution of at least 2 μs.
ISSN:2155-3165
DOI:10.1364/AO.54.005861