Quantitative determination of modal photon number density spectrum in arbitrary dielectric structures with a quantum emitter  

作　　者：Li-Heng Chen Fengfeng Luo Yonggui Gao 陈立恒;罗凤凤;高勇贵

机构地区：[1]Department of Basic Courses Teaching,Software Engineering Institute of Guangzhou,Guangzhou 510990,China

出　　处：《Chinese Physics B》2025年第4期423-430,共8页中国物理B(英文版)

基　　金：Project supported by the Basic and Applied Basic Research Project,Guangzhou Basic Research Plan(Grant No.202201011444).

摘　　要：Understanding the photon number statistics of a quantum emitter(QE)interacting with complex photonic environments is fundamental to advances in quantum optics and nanophotonics.We introduce a general theoretical framework for calculating the modal photon number density spectrum(MPNDS)in arbitrary dielectric structures with an embedded two-level QE.We validate our approach by investigating a system composed of a two-level QE and a photonic crystal(PhC)slab with an L3 cavity and a waveguide,finding that the MPNDS exhibits significant changes in both waveguide and background radiative channels as the interaction between the QE and modal field transitions from weak coupling to strong coupling.We observe that the number of photons guided along the waveguide shows a strong dependence on the QE’s transition frequency and transition dipole moment,but demonstrates robustness to the transition dipole moment when the transition frequency approaches the waveguide cutoff frequency.Our work allows for the determination and tailoring of light emission characteristics across diverse radiative channels in complex photonic environments.

关 键 词：beta factor light extraction efficiency photoluminescence spectrum photonic crystals power spectrum spontaneous emission strong coupling interaction 

分 类 号：O431[机械工程—光学工程]