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Photonic-crystal cavities compatible with the highly subwavelength thicknesses and flexibility requirements of mechanically-stressed Ge nanomembranes are developed and used to demonstrate a strong (20×) strain-induced light-emission efficiency enhancement.
Direct-bandgap light emission from Ge nanomembranes is strongly enhanced and red-shifted through the application of tensile strain, combined with the use of a periodic array of amorphous-Si nanopillars to outcouple the strain-enhanced luminescence.
The use of interband/intersubband photodetection for thermophotovoltaic energy conversion is numerically investigated. The simulation results indicate that this approach can double the present state-of-the-art in thermophotovoltaic power generation.
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