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A Heterogeneous Photonic Platform for Radiative Enhancement and Efficient Collection of hBN Quantum Light Emission

ORAL

Abstract

The ability to efficiently generate and extract on-demand single photons is important for many quantum information applications. Optical cavities that produce enhanced photon collection efficiency through mode engineering and radiative lifetime reduction via the Purcell effect are ideal for meeting these requirements. Here, we demonstrate a novel photonic platform that is designed to enhance the emission characteristics and collection of quantum emitters in hexagonal boron nitride (hBN) that span the visible to near infrared (NIR) wavelengths. Our platform features silicon nitride circular Bragg gratings (CBG) that satisfy the first- and second-order Bragg condition in the blue and NIR wavelength regimes. This feature, coupled with a metal back mirror that exhibits broadband reflectivity, produces highly directional upward emission spanning our entire wavelength range of interest. The CBG combined with the wavelength scale cavity dimensions allows us to achieve a simulated Purcell factor of at least 18 and collection efficiency up to 95% within a 0.9 NA objective. Also, we develop an electron-beam irradiation process to engineer site-specific defects in hBN with reproducible emission wavelengths at 436 nm. We will discuss how these hBN visible and NIR defects can be deterministically integrated with our CBGs. This platform could accelerate the realization of high-rate, Purcell-enhanced single-photon emission with near unity collection efficiencies spanning the visible and NIR spectrum.

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Presenters

  • Nick D Lewis

    University of California, Santa Barbara

Authors

  • Nick D Lewis

    University of California, Santa Barbara

  • Sahil D Patel

    University of California, Santa Barbara

  • Sean Doan

    Department of Physics, University of California, Santa Barbara, CA 93106-9530, U.S.A., University of California, Santa Barbara

  • Kamyar Parto

    Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106-5080, U.S.A., University of California, Santa Barbara

  • Yiming Pang

    University of California, Santa Barbara

  • Luka Jevremovic

    University of California, Santa Barbara

  • Jose Villagomez

    University of California, Santa Barbara

  • Kenji Watanabe

    National Institute for Materials Science, NIMS, Research Center for Functional Materials, National Institute for Materials Science, Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan, National Institute of Materials Science, Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    National Institute for Materials Science, International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science

  • Galan Moody

    Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106-5080, U.S.A., University of California, Santa Barbara