Unveiling the Enhancement of Spontaneous Emission at Exceptional Points
Lydie Ferrier, Paul Bouteyre, Adi Pick, Sébastien Cueff, Nguyen Ha My Dang, Carole Diederichs, Ali Belarouci, Taha Benyattou, Jiaxin Zhao, Rui Su, Jun Xing, Qih… 展开作者
Lydie Ferrier, Paul Bouteyre, Adi Pick, Sébastien Cueff, Nguyen Ha My Dang, Carole Diederichs, Ali Belarouci, Taha Benyattou, Jiaxin Zhao, Rui Su, Jun Xing, Qihua Xiong, Hai-Son Nguyen
Exceptional points (EPs), singularities of non-Hermitian physics where complex spectral resonances degenerate, are one of the most exotic features of nonequilibrium open systems with unique properties. For instance, the emission rate of quantum emitters placed near resonators with EPs is enhanced (compared to the free-space emission rate) by a factor that scales quadratically with the resonance quality factor. Here, we verify the theory of spontaneous emission at EPs by measuring photoluminescence from photonic-crystal slabs that are embedded with a high-quantum-yield active material. While our experimental results verify the theoretically predicted enhancement, it also highlights the practical limitations on the enhancement due to material loss. Our designed structures can be used in applications that require enhanced and controlled emission, such as quantum sensing and imaging.
Chiral exceptional bound states in the continuum: a higher-order singularity for on-chip control of quantum emission
School of Integrated Circuits, Harbin Institute of Technology (Shenzhen)（哈尔滨工业大学（深圳）集成芯片学院）；Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University（东南大学物理学院量子材料与器件教育部重点实验室）；Institute for Quantum Science and Technology, National University of Defense Technology（国防科技大学量子科学与技术研究院）
Higher-order exceptional points unveiled by nilpotence and mathematical induction
NTT Research, Inc.（NTT研究所）；Nanophotonics Center, NTT, Inc.（NTT光子学中心）；NTT Basic Research Laboratories, NTT, Inc.（NTT基础研究中心）；Central Michigan University（中密歇根大学）；Department of Physics, Institute of Science Tokyo（东京科学大学物理学系）
