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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 13, Iss. 12 — Dec. 1, 1996
  • pp: 2783–2791

Novel sources and detectors for coherent tunable narrow-band terahertz radiation in free space

Aniruddha S. Weling and David H. Auston  »View Author Affiliations


JOSA B, Vol. 13, Issue 12, pp. 2783-2791 (1996)
http://dx.doi.org/10.1364/JOSAB.13.002783


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Abstract

A novel scheme for the optical generation and coherent detection of tunable narrow-band far-infrared radiation in free space is described. This technique involves the optical heterodyning of two linearly chirped broadband pulses to produce a quasi-sinusoidal intensity modulation at tunable terahertz frequencies. The frequency content of the narrow-band terahertz radiation produced by mixing chirped optical pulses in a nonlinear optoelectronic device such as a photoconducting dipole antenna can be tailored simply by controlling the phase modulation of the optical pulses and the delay between them. An optoelectronic terahertz beam system composed of a tunable narrow-band Hertzian dipole emitter and a synchronously gated tunable dipole detector is presented. The performance of this system as a potentially powerful tool for far-infrared pump–probe spectroscopy and the limitations produced by cubic phase modulation in the chirped optical pulses are discussed.

© 1996 Optical Society of America

Citation
Aniruddha S. Weling and David H. Auston, "Novel sources and detectors for coherent tunable narrow-band terahertz radiation in free space," J. Opt. Soc. Am. B 13, 2783-2791 (1996)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-13-12-2783

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