6 February 2008 Tunable narrow-bandwidth source of THz radiation based on frequency down-conversion in periodically structured gallium arsenide
Author Affiliations +
Abstract
We have efficiently generated tunable terahertz (THz) radiation using intracavity parametric down-conversion in gallium arsenide (GaAs). We used three types of micro-structured GaAs to quasi-phase-match the interaction: optically contacted, orientation-patterned, and diffusion-bonded GaAs. The room-temperature GaAs was placed in an optical parametric oscillator (OPO) cavity, and the THz wave was generated by difference-frequency mixing between the OPO signal and idler waves. 250-GHz-bandwidth radiation was generated with frequencies spanning 0.4-3.5 THz. We measured two orders of optical cascading generated by the mixing of optical and THz waves. In a doubly resonant oscillator (DRO) configuration, the efficiency increased by 21 times over the singly resonant oscillator (SRO) performance with an optical-to-THz efficiency of 10-4 and average THz power of 1 mW.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joseph E. Schaar, Joseph E. Schaar, Konstantin L. Vodopyanov, Konstantin L. Vodopyanov, Paulina S. Kuo, Paulina S. Kuo, Martin M. Fejer, Martin M. Fejer, Angie Lin, Angie Lin, Xiaojun Yu, Xiaojun Yu, James S. Harris, James S. Harris, David Bliss, David Bliss, Candace Lynch, Candace Lynch, Vladimir G. Kozlov, Vladimir G. Kozlov, Walter Hurlbut, Walter Hurlbut, } "Tunable narrow-bandwidth source of THz radiation based on frequency down-conversion in periodically structured gallium arsenide", Proc. SPIE 6893, Terahertz Technology and Applications, 689306 (6 February 2008); doi: 10.1117/12.763631; https://doi.org/10.1117/12.763631
PROCEEDINGS
10 PAGES


SHARE
Back to Top