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Yi Sun

Assistant Research Scientist

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  • Illustration of the nanophotonic spectral translation of an electro-optic frequency comb

    A new approach to spectroscopy of quantum systems using nonlinear integrated photonics

    December 20, 2024

    We demonstrate that nanophotonic spectral translation of electro-optic frequency combs is a versatile and compelling approach for addressing high-resolution spectroscopy needs in quantum science and technology.

  • Optical parametric oscillation device with an underlying thermo-optic heater (top) and OPO devices generating colors across the green gap (bottom).

    New results on chip-scale lasers based on nonlinear integrated photonics

    September 30, 2024

    In two new papers, we describe how to increase the continuous tuning range of chip-integrated optical parametric oscillators (OPOs) and we demonstrate dense coverage of the so-called 'green gap' spectral region using such OPOs.

  • Five glowing rings with flame like filaments in a row against a black background. From left to right they are reddish-orange, orange, yellow, green and a greenish-blue.

    Tiny New Lasers Fill a Long-Standing Gap in Visible-Light Colors, Opening New Applications

    September 3, 2024

    It’s not easy making green. For years, scientists have fabricated small, high-quality lasers that generate red and blue light, but the same method hasn’t worked as well in building tiny lasers that emit green light. Green laser pointers have existed for 25 years but only produce light in a narrow spectrum of green and are not integrated in chips. Researchers refer to the dearth of stable, miniature lasers in this region of the visible-light spectrum as the “green gap.” Now a team led by JQI Fellow Kartik Srinivasan has closed the green gap by modifying a tiny optical component: a ring-shaped microresonator, small enough to fit on a chip.