期刊
APPLIED PHYSICS LETTERS
卷 108, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4945737
关键词
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资金
- Danish Council for Independent Research through FTP project [0602-01885B]
- Innovation Fund Denmark through the HOT project [5106-00013B]
Hybrid grating (HG) reflectors with a high-refractive-index cap layer added onto a high contrast grating (HCG) provide a high reflectance close to 100% over a broader wavelength range than HCGs. The combination of a cap layer and a grating layer brings a strong Fabry-Perot (FP) resonance as well as a weak guided mode (GM) resonance. Most of the reflected power results from the FP resonance, while the GM resonance plays a key role in achieving a reflectance close to 100% as well as broadening the stopband. An HG sample with 7 InGaAlAs quantum wells included in the cap layer has been fabricated by directly wafer-bonding a III-V cap layer onto a Si grating layer. Its reflection property has been characterized. This heterogeneously integrated HG reflector may allow for a hybrid III-V on Si laser to be thermally efficient, which has promising prospects for silicon photonics light sources and high-speed operation. (C) 2016 AIP Publishing LLC.
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