Parametric Transformation and Parametric Resonance of Confined Acoustic Phonons and Confined Optical Phonons by an External Electromagnetic Wave in Doping Superlattices

摘要：

　　The parametric transformation and parametric resonance of confined acoustic phonons and confined optical phonons by an external electromagnetic wave in doping superlattices are theoretically studied by using a set of quantum kinetic equations for phonons.The analytic expression of the parametric transformation coefficient K1 and the threshold amplitude Ethreshold of the field in doping superlattices are obtained.Unlike the case of unconfined phonons,the formula of K1 and Ethreshold contains a quantum number m characterizing confined phonons.Their dependence on the temperature T of the system,the wave vector →q⊥ and the frequency-of the electromagnetic wave is studied.Numerical computations have been performed for n-GaAs/p-GaAs doping superlattices.The results have been compared with the case of unconfined phonons,which show that confined phonons cause some unusual effects.

作者: N.Q.Bau N.V.Nghia L.T.Hung

作者单位: Department of Physics,Viet Nam National University Hanoi,334 Nguyen Trai,Hanoi,Vietnam Department of Physics,Water Resources University,175 Tay Son,Hanoi,Vietnam University of Education,Viet Nam National University Hanoi,144 Xuan Thuy,Hanoi,Vietnam

会议类型: 国际会议

会议名称: Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)

会议地点: 苏州

会议语种:英文

页码: 1180-1185

在线出版日期: 2011-09-01（万方平台首次上网日期，不代表论文的发表时间）