Subpicosecond coherent carrier-phonon dynamics in semiconductor heterostructures

Dekorsy, Thomas; Kim, A. M. T.; Cho, Gyu Cheon; Kurz, Heinrich; Kuznetsov, Alex V.; Förster, Arno

Subpicosecond coherent carrier-phonon dynamics in semiconductor heterostructures

Files

PRB_Dekorsy_1996.pdf(178.92 KB)

Date

1996

Authors

Dekorsy, Thomas

Kim, A. M. T.

Cho, Gyu Cheon

Kurz, Heinrich

Kuznetsov, Alex V.

Förster, Arno

Publication type

Journal article

Published in

Physical review B ; 53 (1996), 3. - pp. 1531-1538

Abstract

Coherent longitudinal-optical phonons are generated in semiconductor heterostructures. The coupling of the coherent, longitudinal-optic (LO) phonons to collective carrier excitations oscillating parallel to the growth direction of GaAs/Al0.36Ga0.64As quantum wells is investigated with femtosecond time-resolution. This coupling is found to be weak for small well widths and evolves towards the bulk plasmon phonon coupling at increased well widths. We present a theory for the dielectric function in the growth direction of the heterostructure and calculate the frequency response of the system on the pulsed optical excitation. It is shown that the observations are based on the coupling of coherent phonons to intersubband plasmons.

Subject (DDC)

530 Physics

Cite This

ISO 690

DEKORSY, Thomas, A. M. T. KIM, Gyu Cheon CHO, Heinrich KURZ, Alex V. KUZNETSOV, Arno FÖRSTER, 1996. Subpicosecond coherent carrier-phonon dynamics in semiconductor heterostructures. In: Physical review B. 53(3), pp. 1531-1538. Available under: doi: 10.1103/PhysRevB.53.1531

BibTex

@article{Dekorsy1996Subpi-5058,
  year={1996},
  doi={10.1103/PhysRevB.53.1531},
  title={Subpicosecond coherent carrier-phonon dynamics in semiconductor heterostructures},
  number={3},
  volume={53},
  journal={Physical review B},
  pages={1531--1538},
  author={Dekorsy, Thomas and Kim, A. M. T. and Cho, Gyu Cheon and Kurz, Heinrich and Kuznetsov, Alex V. and Förster, Arno}
}

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