講者：果尚志特聘研究員兼主任（本院應用科學研究中心）
主持人：張嘉升所長（本院物理研究所）
時間：2021年5月11日（星期二）15時至17時
地點：本院物理研究所1樓演講廳
摘要：Non-Hermitian photonic systems with gains and/or losses have recently emerged as a powerful approach for topology-protected optical transport and novel device applications. To date, most of these systems employ coupled optical systems of diffraction-limited dielectric waveguides or microcavities, which exchange energy spatially or temporally. Recently, we introduce a diffraction-unlimited approach using a plasmon–exciton coupling (polariton) system with tunable plasmonic resonance (energy and linewidth) and coupling strength. By using a chirped silver nanogroove cavity array and coupling a single tungsten disulfide monolayer with a large contrast in resonance linewidth, we show the tuning capability through energy level anticrossing and plasmon–exciton hybridization (linewidth crossover), as well as spontaneous symmetry breaking across the exception point at zero detuning. This two-dimensional hybrid material system can be applied as a scalable and integratable platform for non-Hermitian photonics, featuring seamless integration of two-dimensional materials, broadband tuning, and operation at room temperature.
活動網址：https://www.phys.sinica.edu.tw/lecture_detail.php?id=2515
聯絡人：鍾艾庭，(02)2789-8365，aiting@gate.sinica.edu.tw