具有悄声画廊模式的窄 ZnO 微镜中光增益的起源

IF 1.4 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY JETP Letters Pub Date : 2024-08-11 DOI:10.1134/S0021364024601519
A. P. Tarasov, L. A. Zadorozhnaya, V. M. Kanevsky
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摘要

由于具有足够高的激光阈值,相对较小的氧化锌微晶激光器中的受激发射通常被认为是由反向电子-空穴等离子体(EHP)提供的。在本研究中,我们使用通过改进的热蒸发方法合成的直径为 1-6 µm 的氧化锌微晶,研究了此类发射器中光学增益的性质,这些微晶在近紫外范围内表现出whispering-gallery mode (WGM) lasing。研究表明,在低温或室温条件下,这些物体的光学增益并不是 EHP 种群反转的结果。相反,主要的增益机制是自由电子对电子-空穴对的散射过程。与大尺寸 ZnO WGM 微腔的情况不同,在小直径微镜中,这一过程在很宽的温度范围内都占主导地位。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Origin of Optical Gain in Narrow ZnO Microrods with Whispering Gallery Modes

Due to sufficiently high lasing thresholds, stimulated emission in relatively small ZnO microcrystal lasers is often considered to be fed by an inverted electron–hole plasma (EHP). In this study, the nature of optical gain in such emitters is investigated using ZnO microrods 1–6 µm in diameter synthesized by a modified thermal evaporation method and exhibiting whispering-gallery mode (WGM) lasing in the near ultraviolet range. It is demonstrated that optical gain in these objects is not a consequence of population inversion of the EHP at either low or room temperatures. Instead, the primary gain mechanism is the process of scattering of electron–hole pairs by free electrons. Unlike the case of large ZnO WGM microcavities, in small-diameter microrods this process turns out to be dominant over a wide temperature range.

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来源期刊
JETP Letters
JETP Letters 物理-物理:综合
CiteScore
2.40
自引率
30.80%
发文量
164
审稿时长
3-6 weeks
期刊介绍: All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.
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