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Proceedings Paper

AC Stark shift in CdSSe-doped glasses and spectral relaxation in CdTe quantum dots
Author(s): C. H. Brito Cruz; S. Tsuda
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Paper Abstract

We present femtosecond resolution measurements that demonstrate the occurrence of the ac Stark effect in glass samples doped with CdSSe nanocrystallites. The sample is excited by a 50 fs pulse 80 meV below the band edge. The absorption edge shifts tracking the profile of the pumping pulse. At intensities below 0.5 GW/cm2 the edge shift is linear in the pump intensity. Above this value the shift tends to saturate. We also studied CdTe quantum dots in a glass matrix excited resonantly with the 1S - 1S transition. In this case we observe the dynamics of hole relaxation in the valence band. The hole population equilibrates with a time constant of less than 100 fs.

Paper Details

Date Published: 16 May 1994
PDF: 8 pages
Proc. SPIE 2116, Generation, Amplification, and Measurement of Ultrashort Laser Pulses, (16 May 1994); doi: 10.1117/12.175875
Show Author Affiliations
C. H. Brito Cruz, Unicamp (Brazil)
S. Tsuda, Unicamp (Brazil)


Published in SPIE Proceedings Vol. 2116:
Generation, Amplification, and Measurement of Ultrashort Laser Pulses
Rick P. Trebino; Ian A. Walmsley, Editor(s)

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