Bloch oscillations at room temperature
Abstract
We report on the observation of coherent electronic wave-packet oscillations in a semiconductor heterostructure at room temperature. Bloch oscillations are excited in a wide-miniband GaAs/Al0.3Ga0.7As superlattice by femtosecond laser pulses. Several cycles of the coherent electronic motion are observed within the dephasing time of the intraband polarization. The frequency can be tuned by the applied electric field from 4.5 to 8 THz.
- Publication:
-
Physical Review B
- Pub Date:
- June 1995
- DOI:
- 10.1103/PhysRevB.51.17275
- Bibcode:
- 1995PhRvB..5117275D
- Keywords:
-
- 73.20.Dx;
- 42.50.Md;
- 78.47.+p;
- Optical transient phenomena: quantum beats photon echo free-induction decay dephasings and revivals optical nutation and self-induced transparency;
- Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter