Non-perturbative multiphoton excitation studies in an excitonic coupled quantum well system using high-intensity THz laser fields  

作　　者：Monica Gambhir Vinod Prasad 

机构地区：[1]Department of Physics,Swami Shraddhanand College,University of Delhi,Delhi 110036,India [2]Departmento de Quimica,Universidad Autonoma Metropolitans,San Rafael Atlixco No,186,Iztapalapa,Mexico DF 09340,Mexico

出　　处：《Chinese Physics B》2019年第8期355-363,共9页中国物理B（英文版）

摘　　要：Multiphoton excitations and nonlinear optical properties of exciton states in GaAs/AlxGa1-xAs coupled quantum well structure have been theoretically investigated under the influence of a time-varying high-intensity terahertz(THz)laser field.Non-perturbative Floquet theory is employed to solve the time-dependent equation of motion for the laser-driven excitonic quantum well system.The response to the field parameters,such as intensity and frequency of the laser electric field on the state populations,can be used in various optical semiconductor device applications,such as photodetectors,sensors,all-optical switches,and terahertz emitters.Multiphoton excitations and nonlinear optical properties of exciton states in GaAs/AlxGa1-xAs coupled quantum well structure have been theoretically investigated under the influence of a time-varying high-intensity terahertz（THz） laser field. Non-perturbative Floquet theory is employed to solve the time-dependent equation of motion for the laser-driven excitonic quantum well system. The response to the field parameters, such as intensity and frequency of the laser electric field on the state populations, can be used in various optical semiconductor device applications, such as photodetectors,sensors, all-optical switches, and terahertz emitters.

关 键 词：quantum well EXCITONS TERAHERTZ NON-PERTURBATIVE MULTIPHOTON laser FLOQUET 

分 类 号：O4[理学—物理]