Journal
OPTICS EXPRESS
Volume 23, Issue 4, Pages 3951-3959Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.003951
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Funding
- JSPS KAKENHI [23686015]
- Asahi Glass Foundation
- NanoSquare program
- Future Pioneering Projects
- CPHoST program
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We have precisely measured the Raman shift of photonic crystal silicon heterostructure nanocavities for Raman laser applications. We utilized a near-infrared excitation laser of wavelength 1.42 mu m in order to avoid local sample heating and exploited two high-Q nanocavity modes to calibrate the Raman frequency. The measured Raman shift was 15.606 THz (520.71 cm(-1)) with a small uncertainty of 1.0 x 10(-3) THz. In addition, we investigated the compressive stress generated in a photonic crystal slab in which a similar to 5.1 x 10(-3) THz blue shift of the Raman peak and a slight warpage of the slab were observed. We also demonstrated that the stress could be eliminated by using a cantilever structure. (C) 2015 Optical Society of America
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