Quantum mechanical solution to spectral lineshape in strongly-coupled atom-nanocavity system  

作　　者：Jian Zeng Zhi-Yuan Li 曾健;李志远(School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510641,China

出　　处：《Chinese Physics B》2022年第4期272-280,共9页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2018YFA0306200);the National Natural Science Foundation of China(Grant No.11974119);Guangdong Provincial Innovative and Entrepreneurial Research Team Program,China。

摘　　要：The strongly coupled system composed of atoms,molecules,molecule aggregates,and semiconductor quantum dots embedded within an optical microcavity/nanocavity with high quality factor and/or low modal volume has become an excellent platform to study cavity quantum electrodynamics(CQED),where a prominent quantum effect called Rabi splitting can occur due to strong interaction of cavity-mode single-photon with the two-level atomic states.In this paper,we build a new quantum model that can describe the optical response of the strongly-coupled system under the action of an external probing light and the spectral lineshape.We take the Hamiltonian for the strongly-coupled photon-atom system as the unperturbed Hamiltonian H_(0)and the interaction Hamiltonian of the probe light upon the coupled-system quantum states as the perturbed Hamiltonian V.The theory yields a double Lorentzian lineshape for the permittivity function,which agrees well with experimental observation of Rabi splitting in terms of spectral splitting.This quantum theory will pave the way to construct a complete understanding for the microscopic strongly-coupled system that will become an important element for quantum information processing,nano-optical integrated circuits,and polariton chemistry.

关 键 词：Rabi splitting NANOCAVITY double Lorentzian lineshape 

分 类 号：O413.1[理学—理论物理]