Abstract
Far-infrared generation (λ=60 μm) by difference-frequency mixing in a coupled quantum well two-dimensional electron system is reported. Extremely large values of the nonlinear susceptibility are found (χ ω2-ω1(2)-10-6 m/V) by engineering a doubly resonant structure with narrow intersubband transition linewidths (Γ∼1-2 meV). The effect of many body interactions (depolarization shift) on the frequency dependence of the process is observed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 445-447 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 65 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1994 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)