Diamond mirrors for high-power continuous-wave lasers

Haig A. Atikian, Neil Sinclair, Pawel Latawiec, Xiao Xiong, Srujan Meesala, Scarlett Gauthier, Daniel Wintz, Joseph Randi, David Bernot, Sage DeFrances, Jeffrey Thomas, Michael Roman, Sean Durrant, Federico Capasso and Marko Lončar ()
Additional contact information
Haig A. Atikian: Harvard University
Neil Sinclair: Harvard University
Pawel Latawiec: Harvard University
Xiao Xiong: Harvard University
Srujan Meesala: Harvard University
Scarlett Gauthier: Harvard University
Daniel Wintz: Harvard University
Joseph Randi: Pennsylvania State University Applied Research Laboratory, Electro-Optics Center
David Bernot: Pennsylvania State University Applied Research Laboratory, Electro-Optics Center
Sage DeFrances: Pennsylvania State University Applied Research Laboratory, Electro-Optics Center
Jeffrey Thomas: Pennsylvania State University Applied Research Laboratory, Electro-Optics Center
Michael Roman: Dahlgren Division
Sean Durrant: Dahlgren Division
Federico Capasso: Harvard University
Marko Lončar: Harvard University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract High-power continuous-wave (CW) lasers are used in a variety of areas including industry, medicine, communications, and defense. Yet, conventional optics, which are based on multi-layer coatings, are damaged when illuminated by high-power CW laser light, primarily due to thermal loading. This hampers the effectiveness, restricts the scope and utility, and raises the cost and complexity of high-power CW laser applications. Here we demonstrate monolithic and highly reflective mirrors that operate under high-power CW laser irradiation without damage. In contrast to conventional mirrors, ours are realized by etching nanostructures into the surface of single-crystal diamond, a material with exceptional optical and thermal properties. We measure reflectivities of greater than 98% and demonstrate damage-free operation using 10 kW of CW laser light at 1070 nm, focused to a spot of 750 μm diameter. In contrast, we observe damage to a conventional dielectric mirror when illuminated by the same beam. Our results initiate a new category of optics that operate under extreme conditions, which has potential to improve or create new applications of high-power lasers.

Date: 2022
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DOI: 10.1038/s41467-022-30335-2

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