Absorption coefficient of bulk and thin film Cu2O |
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Authors: | Claudia Malerba,Francesco Biccari,Cristy Leonor Azanza RicardoMirco D&rsquo Incau,Paolo ScardiAlberto Mittiga |
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Affiliation: | a ENEA, Casaccia Research Center, via Anguillarese 301, 00123 Roma, Italy b Department of Materials Engineering and Industrial Technologies, University of Trento, via Mesiano 77, 38123 Trento, Italy |
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Abstract: | The optical absorption coefficient of thin film and bulk Cu2O at room temperature is obtained from an accurate analysis of their transmittance and reflectance spectra. These absorption spectra are modeled, together with the low temperature data reported in the literature, using an analytical expression to assess and quantify the role of the different absorption mechanisms. The results suggest that direct forbidden transitions and indirect transitions play an almost equally relevant role. A table of the optical constants of Cu2O single crystal is given for reference. |
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Keywords: | Cu2O Cuprous oxide Optical properties Exciton absorption |
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