Terahertz-wave generation in quasi-phase-matched GaAs
- 2 October 2006
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 89 (14) , 141119
- https://doi.org/10.1063/1.2357551
Abstract
The authors demonstrate an efficient room temperature source of terahertz radiation using femtosecond laser pulses as a pump and GaAs structures with periodically inverted crystalline orientation, such as diffusion-bonded stacked GaAs and epitaxially grown orientation-patterned GaAs, as a nonlinear optical medium. By changing the GaAs orientation-reversal period ( 504 – 1277 μ m ) , or the pump wavelength ( 2 – 4.4 μ m ) , we were able to generate narrow-bandwidth ( ∼ 100 GHz ) terahertz wave packets, tunable between 0.9 and 3 THz , with the optical-to-terahertz photon conversion efficiency of 3.3%.Keywords
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