Translator Disclaimer
2 June 1994 Optical-heterodyne generation in low-temperature-grown GaAs up to 1.2 THz
Author Affiliations +
Low-temperature-grown, non-stoichiometric GaAs is used as an optical mixer to generate coherent output radiation up to a frequency of 1.2 THz. The mixer structure consists of an epitaxial layer of the LTG GaAs material with submicron interdigitated electrodes fabricated on the top surface. Terahertz photocurrents are generated in the gaps between the electrodes and power is radiated by coupling these currents efficiently into a self-complementary spiral antenna. The experimental roll-off in photomixer output power is explained by two time constants - one for the electron-hole recombination time of 0.35 ps and the other for the photomixer-antenna RC time constant of 0.62 ps. The photomixer demonstrates the capability to generate continuous-wave radiation in a spectral region where tunable coherent radiation has been lacking.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Elliott R. Brown, K. Alexander McIntosh, Kirby B. Nichols, M. J. Manfra, and C. L. Dennis "Optical-heterodyne generation in low-temperature-grown GaAs up to 1.2 THz", Proc. SPIE 2145, Nonlinear Optics for High-Speed Electronics and Optical Frequency Conversion, (2 June 1994);

Back to Top