Generating sequences of phonon wave packets by optical excitation of a quantum dot

19th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures

Reiter, D.E.^1,2 ; Wigger, D.^1 ; Lüker, S.^1 ; Axt, V.M.^3 ; Machnikowski, P.^4 ; Kuhn, T.^1

Institut für Festkörpertheorie, Universität Münster, Münster

48149, Germany^1

Imperial College London, South Kensington Campus, London

SW7 2AZ, United Kingdom^2

Theoretische Physik III, Universitát Bayreuth, Bayreuth

95440, Germany^3

Department of Theoretical Physics, Wroclaw University of Technology, Wroclaw

50-370, Poland^4

关键词: Detuned;    Energy and information;    Fluctuation properties;    Generation process;    Lattice displacement;    Phonon wave packets;    Solid-state system;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/647/1/012025/pdf
DOI  :  10.1088/1742-6596/647/1/012025

来源: IOP

【 摘 要 】

Phonons can play an active role in controlling solid state systems or in the transport of energy and information. Thus, it is vital to understand generation processes and properties of phonons. By optical excitation of a semiconductor quantum dot, a sequence of phonon wave packets can be created. In this paper we focus on the fluctuation properties of lattice displacement and momentum of these phonon wave packets. For detuned excitation the fluctuations may fall below their respective vacuum values and squeezing occurs.