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Showing 1–3 of 3 results
Advanced filters: Author: Leevi Kallioniemi Clear advanced filters

  • The efficiency of nonlinear optical processes in 2D materials is often reduced by weak light-matter interactions and crystal symmetry constraints. Here, the authors report the enhancement of classical second-harmonic generation in hexagonal boron nitride and quantum spontaneous parametric down-conversion in NbOCl2 flakes by combining them with Au or SiO2/Au substrates.

    • Xiaodan Lyu
    • Leevi Kallioniemi
    • Weibo Gao
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-11

  • Polarization-entangled photon pairs are generated from two perpendicularly aligned two-dimensional crystals of NbOCl2. The polarization-entangled state is measured with a fidelity up to 86%. The measured count rate normalized to pump power and interaction length is 472 Hz mW−1 mm−1.

    • Leevi Kallioniemi
    • Xiaodan Lyu
    • Weibo Gao
    Research
    Nature Photonics
    Volume: 19, P: 142-148

  • Compact sources of entangled photons are desired for quantum communication, computing, and cryptography. Here, the authors report high entangled photon pair generation rates in rhombohedral boron nitride, showing its potential as a tunable platform for Bell state generation.

    • Xiaodan Lyu
    • Leevi Kallioniemi
    • Weibo Gao
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-8