Abstract
We report experimental demonstration of the Kennard-Stepanov (KS) relation, a fundamental equilibrium relation determined by absolute temperature, between photoluminescence (PL) and PL-excitation spectra of a doped quantum well. With the resonant excitation PL measurement technique, the KS relation has been fulfilled at 5-220 K, thanks to the thermal bath provided by the resident carriers introduced with the doping. Crossover to quasi thermal or nonthermal carrier distributions has also been characterized quantitatively via systematic off-resonant excitations.
Original language | English (US) |
---|---|
Article number | 033307 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 80 |
Issue number | 3 |
DOIs | |
State | Published - Aug 6 2009 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics