Femtosecond excitonic photocurrent transients in quantum well striplines

W. H. Knox; G. W. t'Hooft; G. W. t'Hooft; M. C. Nuss; D. A. B. Miller; G. E. Doran; J. E. Cunningham; T. H. Chiu

doi:10.1364/OAM.1992.TuBB3

Optical Society of America Annual Meeting
Technical Digest Series (Optica Publishing Group, 1992),
paper TuBB3
•https://doi.org/10.1364/OAM.1992.TuBB3

Femtosecond excitonic photocurrent transients in quantum well striplines

W. H. Knox, G. W. t'Hooft, M. C. Nuss, D. A. B. Miller, G. E. Doran, J. E. Cunningham, and T. H. Chiu

OSA Annual Meeting 1992

Albuquerque, New Mexico United States
20–25 September 1992
ISBN:

From the session
Symposium on Ultrafast Electronics and Device Diagnostics (TuBB)

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W. H. Knox, G. W. t'Hooft, M. C. Nuss, D. A. B. Miller, G. E. Doran, J. E. Cunningham, and T. H. Chiu, "Femtosecond excitonic photocurrent transients in quantum well striplines," in Optical Society of America Annual Meeting, Technical Digest Series (Optica Publishing Group, 1992), paper TuBB3.

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Abstract

Electro-optic sampling and tunable infrared femtosecond optical pulses are used to measure photocurrent transients generated in GaAs quantum well coplanar microstrip samples at 77 K. This combination allows us to investigate the dynamics of photocurrent with 300 fs time resolution while exciting near the exciton resonance. We find no evidence for ac–dc Stark effect (below-bandgap field-induced optical rectification) signals at small detunings with the electric field applied either parallel or perpendicular to the quantum wells; however, other photoconductive overshoot transients are observed.

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