材料科学
低语长廊波浪
法布里-珀罗干涉仪
窃窃私语画廊
光学
非线性系统
光电子学
谐振器
波长
物理
量子力学
作者
Yury Berdnikov,I. V. Shtrom,Maria Rozhavskaya,W. V. Lundin,Nicholas R. Hendricks,Rachel Grange,Maria Timofeeva
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2021-07-16
卷期号:32 (40): 40LT01-40LT01
被引量:2
标识
DOI:10.1088/1361-6528/ac1017
摘要
Engineering nonlinear optical responses at the microscale is a key topic in photonics for achieving efficient frequency conversion and light manipulation. Gallium nitride (GaN) is a promising semiconductor material for integrated nonlinear photonic structures. In this work, we use epitaxially grown GaN microwires as nonlinear optical whispering gallery and Fabry-Perot resonators. We demonstrate an effective generation of second-harmonic and polarization-dependent signals of whispering gallery and Fabry-Perot modes (FPM) under near-infrared (NIR) excitation. We show how the rotation of the excitation polarization can be used to control and switch between Fabry-Perot and whispering gallery modes in tapered GaN microwire resonators. We demonstrate the enhancement of two-photon luminescence in the yellow-green spectral range due to efficient coupling between whispering gallery, FPM, and excitonic states in GaN. This luminescence enhancement allows us to conveniently visualize whispering gallery modes excited with a NIR source. Such microwire resonators can be used as compact microlasers or sensing elements in photonic sensors.
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