Time-resolved observation of coherent phonons by the Franz-Keldysh effect | Zendy

G. C. Cho | Zendy; H. J. Bakker | Zendy; T. Dekorsy | Zendy; H. Kurz | Zendy

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Time-resolved observation of coherent phonons by the Franz-Keldysh effect

Author(s) -

G. C. Cho,

H. J. Bakker,

T. Dekorsy,

H. Kurz

Publication year - 1996

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.53.6904

Subject(s) - phonon , physics , condensed matter physics , electric field , nonlinear system , modulation (music) , field (mathematics) , quantum mechanics , mathematics , acoustics , pure mathematics

Institut fu ¨r Halbleitertechnik II, Rheinisch-Westfalische Technische Hochschule Aachen,Sommerfeldstrasse 24, D-52056 Aachen, Germany~Received 11 August 1995!We report on the time-resolved observation of coherent optical phonons in GaAs by the Franz-Keldysheffect. This effect leads to a modulation of the optical interband transitions with a nonlinear dependence on themacroscopic electric eld associated with the coherent phonons. We nd that the nonlinear electro-optic effectforms a far more efcient detection mechanism for coherent phonons than the linear electro-optic effect nearthe band gap.

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