Abstract
We report on the impulsive excitation and control of intersubband and hybrid intersubband-cyclotron modes in a two-dimensional electron gas by ultrafast optical pulses. Pump-probe experiments were performed in the reflection geometry on a modulation-doped GaAs/Al xGa 1-xAs quantum well at 7 K. Using a pulse shaper to produce multiple excitation pulses, we demonstrate coherent control of charge-density intersubband modes. When a tilted magnetic field is applied, we observe oscillations due to hybrid intersubband-cyclotron modes. The features observed in the pump-probe experiments are consistent in frequency and selection rules with spontaneous Raman scattering data obtained from the same sample.
Original language | English (US) |
---|---|
Pages (from-to) | 574-578 |
Number of pages | 5 |
Journal | Solid State Communications |
Volume | 135 |
Issue number | 9-10 |
DOIs | |
State | Published - Sep 2005 |
Externally published | Yes |
Event | Fundamental Optical and Quantum Effects in Condensed Matter - Duration: Sep 9 2004 → Sep 10 2004 |
All Science Journal Classification (ASJC) codes
- General Chemistry
- Condensed Matter Physics
- Materials Chemistry
Keywords
- D. Cyclotron resonance
- E. Inelastic scattering
- E. Ultrafast spectroscopy