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Optical investigation of bloch oscillations in semiconductor superlattices

✍ Scribed by Karl Leo; Joehen Feldmann; Jagdeep Shah; Gero von Plessen; Peter Thomas; Stefan Schmitt-Rink; John Cunningham

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
206 KB
Volume
13
Category
Article
ISSN
0749-6036

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✦ Synopsis

We investigate the dephasing dynamics in semiconductor superlattices using timeresolved four-wave mixing. The signals show a periodic modulation which can be related to Bloch oscillations in the superlattice miniband. The oscillation frequency is strongly dependent on the applied field, in agreement with theoretical expectations. At high fields, the dephasing times become very short due to field-induced scattering.

πŸ“œ SIMILAR VOLUMES

Chirped Bloch oscillations in strain-bal
Chirped Bloch oscillations in strain-balanced InGaAs/InGaAs superlattices
✍ M. FΓΆrst; G.C. Cho; T. Dekorsy; H. Kurz πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 174 KB

Bloch oscillations excited in a strain-balanced In x Ga 1-x As/In y Ga 1-y As superlattice by fs optical pulses at 1.55 Β΅m are investigated in time-resolved transmission spectroscopy. The transition from the coherent oscillatory motion to an incoherent drift transport of the electrons is observed vi