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) |
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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)