Deep‐UV Photonic Crystal Surface‐Emitting Lasers

IF 10 1区 物理与天体物理 Q1 OPTICS
Doğukan Apaydın, Hjalmar Andersson, Lukas Uhlig, Sarina Graupeter, Joachim Ciers, Giulia Cardinali, Erik Strandberg, Tim Wernicke, Michael Kneissl, Ulrich Theodor Schwarz, Philippe Tassin, Åsa Haglund
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引用次数: 0

Abstract

Today's ultraviolet lasers are bulky, expensive, have low power‐conversion efficiency, and usually suffer from poor beam quality. Semiconductor lasers have addressed these issues in the visible and infrared parts of the electromagnetic spectrum; but in the ultraviolet, they are just starting to see the light of day. Edge‐emitting semiconductor lasers are the only ones demonstrated under electrical injection in the deep‐ultraviolet (<280 nm) and they inherently suffer from poor beam qualities, multiple modes, and catastrophic optical damage to the mirror. The first deep‐UV photonic crystal surface‐emitting lasers are demonstrated here. The devices show single‐mode emission around 279 nm with less than 1 beam divergence. They require a specific design to overcome optical scattering and the low refractive index that otherwise prohibits a 2D standing optical field. The optically pumped deep‐ultraviolet photonic crystal surface‐emitting lasers offer drastically improved beam quality and provide an important step toward low‐divergent, watt‐class, electrically‐driven UV PCSELs.
深紫外光子晶体表面发射激光器
目前的紫外激光器体积庞大,价格昂贵,功率转换效率低,而且光束质量差。半导体激光器在电磁波谱的可见和红外部分解决了这些问题;但在紫外线下,它们才刚刚开始看到阳光。边缘发射半导体激光器是唯一在深紫外(<280 nm)电注入下被证明的激光器,它们固有地受到光束质量差、多模式和对反射镜的灾难性光学损伤的影响。本文首次展示了深紫外光子晶体表面发射激光器。器件显示单模发射约279 nm,光束发散小于1。它们需要一个特殊的设计来克服光学散射和低折射率,否则会阻止二维固定光场。光泵浦的深紫外光子晶体表面发射激光器大大提高了光束质量,并向低发散、瓦特级、电驱动的紫外PCSELs迈出了重要的一步。
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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
期刊介绍: Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.
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