期刊
OPTICA
卷 4, 期 8, 页码 893-896出版社
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.4.000893
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资金
- National Basic Research Program of China [2014CB340002]
- National Natural Science Foundation of China (NSFC) [51561165012, 61210014, 61574082, 61621064]
- High Technology Research and Development Program of China [2015AA017101]
- Tsinghua University Initiative Scientific Research Program [20131089364, 20161080062, 20161080068]
- Open Fund of State Key Laboratory on Integrated Optoelectronics [IOSKL2014KF09]
Wurtzite aluminum nitride (AlN) is known to exhibit six Raman-active optic phonons, making it appealing for Raman lasing. Here, we demonstrate continuous-wave Raman lasers with a low threshold and a high slope efficiency in high quality factor AlN-on-sapphire microrings. Stokes radiations around 1.7-1.8 mu m and cascaded operation into 1.9-2.0 mu m are identified with a telecom pump. Two types of Stokes lights with distinct Raman shifts and polarizations are recorded via selective excitation of corresponding optic phonons, in accordance with the Raman selection rules in AlN. The observed lasing behavior is satisfactorily accounted for by a theoretical analysis. Our results indicate that AlN-on-sapphire should be promising for integrated nonlinear optics. (C) 2017 Optical Society of America
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