First-order coherent THz optical sideband generation from asymmetric QW intersubband transitions
Abstract
We have generated terahertz (THz) optical sidebands on a near-infrared probe beam by driving an excitonic intersubband resonance with THz electric fields. We use THz radiation polarized along the non-centro-symmetric axis of a quantum well system to generate a comb of sidebands ωsideband= ωNIR+ nωTHz. In exploring the rich polarization of the process's power, and NIR frequency dependences we encounter both an efficient perturbative regime modeled by a X(2) non-linear susceptibility, and a non-perturbative regime which has not been previously explored in driven quantum systems.
- Publication:
-
Physica E Low-Dimensional Systems and Nanostructures
- Pub Date:
- March 2000
- DOI:
- 10.1016/S1386-9477(99)00319-7
- Bibcode:
- 2000PhyE....7..187P