Enhancement of whispering-gallery-mode lasing in GaN nanoflower-type microdisk with multiple branches

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-06-28 DOI:10.1016/j.optlastec.2025.113458

Taehee Kim , Seonyoung Park , M. Meyyappan , Kihyun Kim

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引用次数: 0

Abstract

We fabricate GaN-based flower-type micro-cavity lasers as an alternative to conventional microdisks and analyze their optical characteristics. The optical output intensity of the flower-type lasers is 8 times higher than that of circular microcavity lasers, which is enhanced with increasing number of petals. The emission characteristics indicate stronger emission in edge areas of the device compared to the center region due to the three-dimensional whispering gallery mode. The nano-flower devices exhibit a very low threshold current of 50 µA, which is much smaller than that of the circular counterpart. The emission modes of the flower-type lasers are in excellent agreement with a three-dimensional Rayleigh-Fabry-Pérot model. The fabrication of the petal design involves only one additional etching step, resulting in significantly higher performance. The results show that the nano-flower structure can provide enhanced performance in photonics applications relative to the conventional disk-type lasers.

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多分支GaN纳米小花型微磁盘中低语通道模式激光的增强

我们制造了基于gan的花型微腔激光器作为传统微磁盘的替代品，并分析了它们的光学特性。花型激光器的光输出强度是圆形微腔激光器的8倍，且随花瓣数量的增加而增强。发射特性表明，由于三维低语通道模式，器件边缘区域的发射比中心区域强。纳米花器件的阈值电流非常低，仅为50µa，远远小于圆形器件的阈值电流。花型激光器的发射模式与三维瑞利-法布里-帕齐罗模型非常吻合。花瓣设计的制造只涉及一个额外的蚀刻步骤，导致显着更高的性能。结果表明，与传统的圆盘型激光器相比，纳米花结构在光子学应用中具有更高的性能。

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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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems