17 000%/W second-harmonic conversion efficiency in single-crystalline aluminum nitride microresonators
17 000%/W second-harmonic conversion efficiency in single-crystalline aluminum nitride microresonators
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DOI：
10.1063/1.5042506
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发表时间：
2018-09-24
影响因子：
4
通讯作者：
Tang, Hong X.
中科院分区：
文献类型：
--
作者：
Bruch, Alexander W.;Liu, Xianwen;Tang, Hong X.
高品质因数光学微腔已被用于各种材料系统中，以增强非线性光学相互作用。虽然单晶氮化铝微谐振器最近已经成为四波混频和拉曼激光等集成非线性光学的低损耗平台，但很少有人研究这种材料用于二次谐波产生。在这封信中，我们展示了一种用外延氮化铝薄膜制作双谐振位相匹配环形谐振器的优化方法。在低功率下获得了前所未有的17000%/W的二次谐波产生效率，并且在3.5 mW的较低输入功率下观察到泵浦损耗。这使得外延氮化铝成为目前集成平台中效率最高的二次谐波发生器。由AIP出版公司出版。
High quality factor optical microcavities have been employed in a variety of material systems to enhance nonlinear optical interactions. While single-crystalline aluminum nitride microresonators have recently emerged as a low loss platform for integrated nonlinear optics such as four wave mixing and Raman lasing, few studies have investigated this material for second-harmonic generation. In this letter, we demonstrate an optimized fabrication of dually resonant phase-matched ring resonators from epitaxial aluminum nitride thin films. An unprecendented second-harmonic generation efficiency of 17 000%/W is obtained in the low power regime, and pump depletion is observed at a relatively low input power of 3.5 mW. This poses epitaxial aluminum nitride as the highest efficiency second-harmonic generator among current integrated platforms. Published by AIP Publishing.