期刊
OPTICS EXPRESS
卷 23, 期 19, 页码 A1220-A1235出版社
Optica Publishing Group
DOI: 10.1364/OE.23.0A1220
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资金
- European Space Agency under the GSP/ARIADNA program [4000112049/14/NL/MV]
- MINECO [ENE2012-37804-C02-02, AIC-B-2011-0806]
- Community of Madrid [S2013/MAE-2780]
A series of photonic crystal structures are optimized for a photon enhanced thermionic emitter. With realistic parameter values to describe a p-type GaAs device we find an efficiency above 10%. The light-trapping structures increases the performance by 2% over an optimal bilayer anti-reflective coating. We find a device efficiency very close to the case of a Lambertian absorber, but below its maximum performance. To prevent an efficiency below 10% the vacuum gap must be dimensioned according to the concentration factor of the solar irradiance. (C) 2015 Optical Society of America
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