Efficient THz Source Based on Cascaded Optical Down-Conversion in Orientation-Patterned GaAs Structures
Abstract
The goal of this TIFT I-A program was to demonstrate an efficient room temperature source for THz imaging systems based on optical down-conversion in an orientation-patterned GaAs microstructure, incorporated into a resonant cavity, and pumped by a compact solid-state laser. Research was focused on (1) fabrication of quasi-phase-matched (QPM) GaAs microstructures with periodic reversal of crystalline orientation, including orientation-patterned GaAs (OP-GaAs), diffusion-bonded GaAs (DB-GaAs) and optically-contacted GaAs (OC-GaAs), (2) producing THz radiation in periodic GaAs structures outside the laser cavity using both optical rectification (using femtosecond optical pump pulses) and difference frequency generation (with picosecond pulses), and, finally (3) demonstration of efficient resonantly enhanced THz wave generation with GaAs inside the cavity of an optical parametric oscillator, where 1 mW of average THz power was produced at 2.8 THz.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 29, 2006
- Accession Number
- ADA463635
Entities
People
- J. Schaar
- Konstantin L. Vodopyanov
- M. M. Fejer
- P. Kuo
- R. Route
Organizations
- Stanford University