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Effects of Coupling Lens on Optical Refrigeration of Semiconductors |
| DING Kai;ZENG Yi-Ping |
| Novel Material Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 |
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| Cite this article: |
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DING Kai, ZENG Yi-Ping 2008 Chin. Phys. Lett. 25 1878-1880 |
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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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Received: 21 December 2007
Published: 29 April 2008
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| PACS: |
78.30.Fs
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(III-V and II-VI semiconductors)
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85.30.De
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(Semiconductor-device characterization, design, and modeling)
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