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首页> 外文期刊>Japanese journal of applied physics >Lasing Behavior, Gain Property, and Strong Coupling Effects in GaN-Based Vertical-Cavity Surface-Emitting Lasers
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Lasing Behavior, Gain Property, and Strong Coupling Effects in GaN-Based Vertical-Cavity Surface-Emitting Lasers

机译：GaN基垂直腔面发射激光器的激光行为，增益特性和强耦合效应

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摘要

The optical properties of a GaN-based vertical-cavity surface-emitting laser (VCSEL) with two dielectric distributed Bragg reflectors were investigated under optically pumped operation. The laser emits blue-violet light at a wavelength of 414 nm at room temperature with a high spontaneous emission coupling factor (β-factor) of 2 × 10~(-2) and a linewidth of 0.25 nm. The optical gain was determined by the Hakki-Paoli method by measuring the photoluminescence spectra below threshold conditions. At room temperature, an optical gain of 2900 cm~(-1) was obtained under threshold condition. The linewidth enhancement factor (α-factor) is estimated from the ratio of the wavelength and gain derivation with respect to the carrier density, and the α-factor at room temperature is estimated to be 2.8. Strong exciton-photon coupling in the microcavity was observed at room temperature. A 9 meV Rabi splitting with 60% peak-to-valley contrast was determined from the photoluminescence measurements. Emission spectra showing the evolution of anticrossing behavior were also observed.
机译：在光泵浦操作下研究了具有两个介电分布的布拉格反射器的GaN基垂直腔面发射激光器（VCSEL）的光学特性。激光在室温下以414 nm的波长发射蓝紫色光，具有2×10〜（-2）的高自发发射耦合因子（β因子），线宽为0.25 nm。通过Hakki-Paoli方法通过测量低于阈值条件的光致发光光谱来确定光学增益。在室温下，在阈值条件下获得了2900 cm〜（-1）的光学增益。根据波长和增益导数相对于载流子密度的比率来估计线宽增强因子（α因子），并且室温下的α因子估计为2.8。在室温下，在微腔中观察到强激子-光子耦合。从光致发光测量结果确定了具有60％峰谷对比度的9 meV Rabi分裂。还观察到显示抗交叉行为演变的发射光谱。

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