Twisted lattice nanocavity with theoretical quality factor exceeding 200 billion  

作　　者：Ren-Min Ma Hong-Yi Luan Zi-Wei Zhao Wen-Zhi Mao Shao-Lei Wang Yun-Hao Ouyang Zeng-Kai Shao 

机构地区：[1]State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-Optoelectronics,School of Physics,Peking University,Beijing 100871,China [2]Collaborative Innovation Center of Quantum Matter,Beijing 100871,China [3]Peking University Yangtze Delta Institute of Optoelectronics,Nantong 226010,Jiangsu,China [4]National Biomedical Imaging Center,Peking University,Beijing 100871,China

出　　处：《Fundamental Research》2023年第4期537-543,共7页自然科学基础研究（英文版）

基　　金：This work is supported by the National Key R&D Program of China(2018YFA0704401);the Beijing Natural Science Foundation(Z180011);the National Natural Science Foundation of China(12225402,91950115,11774014,61521004 and 62175003);the Tencent Foundation.

摘　　要：Simultaneous localization of light to extreme spatial and spectral scales is of high importance for testing fundamental physics and various applications.However,there is a longstanding trade-off between localizing a light field in space and in frequency.Here we discover a new class of twisted lattice nanocavities based on mode locking in momentum space.The twisted lattice nanocavity hosts a strongly localized light field in a 0.048𝜆3 mode volume with a quality factor exceeding 2.9×1011(∼250𝜇s photon lifetime),which presents a record high figure of merit of light localization among all reported optical cavities.Based on the discovery,we have demonstrated silicon-based twisted lattice nanocavities with quality factor over 1 million.Our result provides a powerful platform to study light-matter interaction in extreme conditions for tests of fundamental physics and applications in nanolasing,ultrasensing,nonlinear optics,optomechanics and quantum-optical devices.

关 键 词：NANOCAVITIES Twisted lattice Quality factor Mode volume Flatband Mode coupling 

分 类 号：O15[理学—数学]