Abstract
Using intersubband photocurrent spectroscopy, we have demonstrated that a bound state in the continuum exists above (Ga,In)(As,N)/(Al,Ga)As quantum wells. The photocurrent spectrum and responsivity show that the excited-state energies lie far above the potential barrier of the quantum well, and the bound nature of the states was confirmed from the long lifetime of the excited carriers and a small coupling with the surrounding continuum. Applying optical phonon scattering theory, we have demonstrated that the relaxation process is governed by scattering from localized nitrogen states to the three-dimensional continuum.
Original language | English |
---|---|
Article number | 115307 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 85 |
Issue number | 11 |
DOIs | |
State | Published - 14 Mar 2012 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics