Open AccessHigh efficiency thermophotovoltaic emitter by metamaterial-based nano-pyramid array
Author(s) -
Wei Gu,
G.H. Tang,
Tao Wu
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.030681
Subject(s) - thermophotovoltaic , poynting vector , thermal emittance , optics , common emitter , metamaterial , wavelength , optoelectronics , materials science , black body radiation , electromagnetic radiation , thermal radiation , physics , radiation , beam (structure) , quantum mechanics , magnetic field , thermodynamics
A 2D pyramidal metamaterial-based nano-structure is proposed as a wavelength-selective Thermophotovoltaic (TPV) emitter. Rigorous coupled-wave analysis complemented with normal field method is used to predict the emittance as well as the electromagnetic field and Poynting vector distributions. The proposed emitter is shown to be wavelength-selective, polarization-insensitive, and direction-insensitive in emittance. The mechanisms supporting the emittance close to 1.0 in the wavelength range of 0.3-2.0 μm are elucidated by the distribution of electromagnetic field and Poynting vectors in the proposed structure. Finally, thermal stability and radiant heat-to-electricity TPV efficiency for a realistic InGaAsSb TPV system are discussed.