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Second-harmonic generation using -quasi-phasematching in a GaAs whispering-gallery-mode microcavity

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  • Paulina S. Kuo

    (Joint Quantum Institute, National Institute of Standards and Technology, & University of Maryland)

  • Jorge Bravo-Abad

    (Joint Quantum Institute, National Institute of Standards and Technology, & University of Maryland
    Universidad Autonoma de Madrid)

  • Glenn S. Solomon

    (Joint Quantum Institute, National Institute of Standards and Technology, & University of Maryland)

Abstract

The crystal symmetry in materials such as GaAs can enable quasi-phasematching for efficient optical frequency conversion without poling, twinning or other engineered domain inversions. symmetry means that a 90° rotation is equivalent to a crystallographic inversion. Therefore, when light circulates about the axis, as in GaAs whispering-gallery-mode microdisks, it encounters effective domain inversions that can produce quasi-phasematching. Microdisk resonators also offer resonant field enhancement, resulting in highly efficient frequency conversion in micrometre-scale volumes. These devices can be integrated in photonic circuits as compact frequency convertors, sources of radiation or entangled photons. Here we present the first experimental observation of second-harmonic generation in a whispering-gallery-mode microcavity utilizing -quasi-phasematching. We use a tapered fibre to couple into the 5-μm diameter microdisk resonator, resulting in a normalized conversion efficiency η≈5 × 10−5mW−1. Simulations indicate that when accounting for fibre-cavity scattering, the normalized conversion efficiency is η≈3 × 10−3mW−1.

Suggested Citation

  • Paulina S. Kuo & Jorge Bravo-Abad & Glenn S. Solomon, 2014. "Second-harmonic generation using -quasi-phasematching in a GaAs whispering-gallery-mode microcavity," Nature Communications, Nature, vol. 5(1), pages 1-7, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4109
    DOI: 10.1038/ncomms4109
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    Cited by:

    1. Jia-Qi Wang & Yuan-Hao Yang & Ming Li & Haiqi Zhou & Xin-Biao Xu & Ji-Zhe Zhang & Chun-Hua Dong & Guang-Can Guo & C.-L. Zou, 2022. "Synthetic five-wave mixing in an integrated microcavity for visible-telecom entanglement generation," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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