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Progress in Photonic-Crystal Surface-Emitting Lasers

Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan
Author to whom correspondence should be addressed.
Invited paper.
Photonics 2019, 6(3), 96;
Received: 12 July 2019 / Revised: 23 August 2019 / Accepted: 27 August 2019 / Published: 29 August 2019
(This article belongs to the Special Issue Photonic Crystal Laser and Related Optical Devices)
Photonic-crystal surface-emitting lasers (PCSELs) have attracted considerable attention as a novel semiconductor laser that surpasses traditional semiconductor lasers. In this review article, we review the current progress of PCSELs, including the demonstration of large-area coherent oscillation, the control of beam patterns, the demonstration of beam steering, and the realization of watt-class and high-beam-quality operation. Furthermore, we show very recent progress in the exploration of high brightness of more than 300 MW cm−2 sr−1, obtained with a high output power of about 10 W while maintaining a high beam quality M2 ~ 2. The PCSELs with such high performances are expected to be applied to a variety of fields, such as laser-based material processing, optical sensing (light-detection and ranging (LiDAR)), and lighting, as they retain the benefits of compact and high-efficiency semiconductor lasers. View Full-Text
Keywords: photonic crystal; semiconductor laser photonic crystal; semiconductor laser
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MDPI and ACS Style

Ishizaki, K.; De Zoysa, M.; Noda, S. Progress in Photonic-Crystal Surface-Emitting Lasers. Photonics 2019, 6, 96.

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