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

Article

关键词: DISPLACIVE EXCITATION;    GAAS;    OSCILLATIONS;    SCATTERING;    MODULATION;    RAMAN;   

DOI  :  10.1103/PhysRevB.53.6904

来源: SCIE

【 摘 要 】

We report on the time-resolved observation of coherent optical phonons in GaAs by the Franz-Keldysh effect. This effect leads to a modulation of the optical interband transitions with a nonlinear dependence on the macroscopic electric field associated with the coherent phonons. We find that the nonlinear electro-optic effect forms a far more efficient detection mechanism for coherent phonons than the linear electro-optic effect near the band gap.

【 授权许可】

Free