Effects of Coupling Lens on Optical Refrigeration of Semiconductors |
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Authors: | DING Kai ZENG Yi-Ping |
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Institution: | Novel Material Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 |
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Abstract: | Optical refrigeration of semiconductors is encountering efficiency difficulties caused by nonradiative recombination and luminescence trapping. A commonly used approach for enhancing luminescence efficiency of a semiconductor device is coupling a lens with the device. We quantitatively study the effects of a coupling lens on optical refrigeration based on rate equations and photon recycling, and calculated cooling efficiencies of different coupling mechanisms and of different lens materials. A GaAs/GaInP heterostructure coupled with a homo-epitaxial GaInP hemispherical lens is recommended. |
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Keywords: | 78 30 Fs 85 30 De |
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