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Showing 1–5 of 5 results
Advanced filters: Author: Huitae Joo Clear advanced filters

  • Nanoscale bandgap tuning in van der Waals heterobilayers using an electro-plasmonic nanocavity provides electrical control of exciton dynamics, producing localized interlayer exciton density gradients and enhanced diffusion currents in the nanoscale.

    • Hyeongwoo Lee
    • Taeyoung Moon
    • Kyoung-Duck Park
    Research
    Nature Materials
    P: 1-8

  • High-speed electrical modulation of the excitonic properties of 2D semiconductors could promote their application for optoelectronic devices. Here, the authors report the dynamic switching of neutral exciton and trion-dominant states in a MoS2 monolayer via a quantum tunneling nanoplasmonic cavity, reaching modulation frequencies up to 8 MHz.

    • Hyeongwoo Lee
    • Sujeong Kim
    • Kyoung-Duck Park
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-7

  • Tip-enhanced vibrational spectroscopy at room temperature is complicated by molecular conformational dynamics, photobleaching, contaminations, and chemical reactions in air. This study demonstrates that a sub-nm protective layer of Al2O3 provides robust conditions for probing single-molecule conformations.

    • Mingu Kang
    • Hyunwoo Kim
    • Kyoung-Duck Park
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9

  • The authors induce a nanoscale strain gradient in monolayer MoS2 suspended on a waveguide and take advantage of propagating surface plasmon polaritons to localize hot electrons in the suspended area. They funnel excitons in the waveguide, facilitating all-optical control of exciton-to-trion conversion.

    • Hyeongwoo Lee
    • Yeonjeong Koo
    • Kyoung-Duck Park
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8

  • We discuss the recent progress on the dynamic control of tip-induced light-matter interactions, especially for the low dimensional quantum materials. This review is divided into three parts based on the type of tip-induced control, i.e., gap control of tip-cavity, tip-pressure control, and near-field polarization control.

    • Yeonjeong Koo
    • Taeyoung Moon
    • Kyoung-Duck Park
    ReviewsOpen Access
    Light: Science & Applications
    Volume: 13, P: 1-18