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Single-Crystal Interference Coatings for Laser-Based Metrology and Manufacturing Systems


Single-Crystal Interference Coatings for Laser-Based Metrology and Manufacturing Systems

Hosted By: Thin Films Technical Group

5 November 2019, 9:30 - 10:30

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Substrate-transferred crystalline coatings are a groundbreaking concept in optical interference coatings. In 2013, fundamental research in optomechanical resonators, “semiconductor supermirrors” demonstrated having the ability to simultaneously achieve ultralow levels of optical and mechanical losses. In this webinar hosted by the OSA Thin Films Technical Group, Garrett Cole of Crystalline Mirror Solutions will provide a discussion on how leveraging semiconductor manufacturing infrastructure, such as epitaxial growth, microfabrication, layer transfer, and direct-bonded GaAs/AlGaAs heterostructures, have reached a level of performance on par with ion-beam sputtered films in the near infrared with scatter + absorption losses < 3 parts per million (ppm) in the wavelength range from 1000-1600 nm. Owing to the single-crystalline microstructure, crystalline coatings exhibit the lowest mechanical loss and highest thermal conductivity (20-30 Wm^-1K^-1) of any supermirror technology. Looking ahead, there is a bright future for crystalline coatings in applications requiring the ultimate levels of optical, thermal, and optomechanical performance, from stabilized lasers for optical atomic clocks, cavity end mirrors for mid-IR enhancement cavities, to robust reflectors for kW-class laser machining systems.

What You Will Learn:

  • The manufacturing of optical interference coatings employing substrate-transferred single-crystal multilayers.
  • The development of these extreme performance compound-semiconductor-based (GaAs/AlGaAs) "crystalline coatings" and their performance metrics, primarily with respect to optical losses and thermomechanical performance.

Who Should Attend:

  • Scientists and engineers curious to learn about alternative manufacturing approaches to thin film optical coatings enabling a significant performance enhancement for applications spanning laser-based optical metrology, high-resolution spectroscopy, and high-power laser-based materials processing.


About the presenter: Garrett D. Cole, Crystalline Mirror Solutions

In 2005, Garrett Cole obtained his PhD in Materials from UC Santa Barbara. Dr. Cole has held positions ranging from a high-tech startup, FLIR Electro-Optical Components to a postdoctoral position at Lawrence Livermore National Laboratory, Marie Curie Fellow of the Austrian Academy of Sciences, and a university assistant in the Faculty of Physics at University of Vienna. Dr. Cole has co-authored 2 book chapters, published more than 50 journal articles and conference proceedings including papers in Science, Nature, Nature Physics, Nature Photonics, Nature Nanotechnology, Nature Communications, Physical Review Letters, and Proceedings of the National Academy of Sciences. Leveraging his expertise in micro and nanofabrication, tunable semiconductor lasers, and cavity optomechanics; Dr. Cole and Professor Markus Aspelmeyer, founded Crystalline Mirror Solutions, an international photonics start-up commercializing high-performance optics for laser-based metrology and manufacturing systems.