Two-color ultrafast spectroscopy of semiconductor quantum wells

Dai-sik Kim; Yeonghwam Ahn; J. Y. Sohn; J. S. Yahng

doi:10.1117/12.349297

24 May 1999 Two-color ultrafast spectroscopy of semiconductor quantum wells

Dai-sik Kim, Yeonghwam Ahn, J. Y. Sohn, J. S. Yahng

Proceedings Volume 3624, Ultrafast Phenomena in Semiconductors III; (1999) https://doi.org/10.1117/12.349297
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

Femtosecond spectroscopy such as two color pump-probe and four-wave mixing (FWM) on GaAs quantum wells has been performed using two partially synchronized, independently tunable lasers with external jitter compensation. In the two beam and three beam ((omega) ₁, (omega) ₁; (omega) ₂) four wave mixing experiments, heavy-and-light-hold beatings are observed with these two mutually incoherent lasers. FWM signals are observed when (omega) ₂ is completely below the exciton energies, with no spectral overlap with the absorption profile. These off-resonant signals are stronger than the interband continuum signals for equivalent detunings. Femtosecond frequency mixing (2(omega) ₁- (omega) ₂) is also demonstrated when the grating is formed by two different frequencies.

Citation Download Citation

Dai-sik Kim, Yeonghwam Ahn, J. Y. Sohn, and J. S. Yahng "Two-color ultrafast spectroscopy of semiconductor quantum wells", Proc. SPIE 3624, Ultrafast Phenomena in Semiconductors III, (24 May 1999); https://doi.org/10.1117/12.349297

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