Journal
APPLIED PHYSICS EXPRESS
Volume 10, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/APEX.10.125501
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Funding
- Nazarbayev University [SST2015014]
- Russian Science Foundation [14-22-00143]
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Metasurfaces consisting of arrays of high-index Mie resonators concentrating/redirecting light are important for integrated optics, photodetectors, and solar cells. Herein, we report the optical properties of low-Ge-content SiGe lens-like Mie resonator island arrays fabricated via dewetting during Ge deposition on a Si(100) surface at approximately 900 degrees C. We observe enhancement of the Si interaction with light owing to the efficient island-induced light concentration in the submicron-depth Si layer, which is mediated by both near-field Mie resonance leaking into the substrate and far-field light focusing. Such metasurfaces can improve the Si photodetector and solar-cell performance. (C) 2017 The Japan Society of Applied Physics
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