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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 22914–22921

Terahertz beam steering using interference of femtosecond optical pulses

Koji Uematsu, Ken-ichiro Maki, and Chiko Otani  »View Author Affiliations

Optics Express, Vol. 20, Issue 20, pp. 22914-22921 (2012)

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A terahertz (THz) beam steering method is demonstrated by applying the characteristic of grating lobe (GL) radiation from a linear array antenna and the interference of femtosecond optical pulses. A photoconductive device is illuminated by two femtosecond laser beams combined at an angle of less than 0.5°. Considering the interference pattern as a THz point source array, THz GL radiation is generated through the superposition of radiation emitted from all point sources and steered by varying the interval of the interference pattern. The THz beam direction could be changed by 20° at 0.93THz by varying the relative incidence angle of the pump beams by 0.033°.

© 2012 OSA

OCIS Codes
(110.5100) Imaging systems : Phased-array imaging systems
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Imaging Systems

Original Manuscript: June 20, 2012
Revised Manuscript: August 31, 2012
Manuscript Accepted: September 1, 2012
Published: September 21, 2012

Koji Uematsu, Ken-ichiro Maki, and Chiko Otani, "Terahertz beam steering using interference of femtosecond optical pulses," Opt. Express 20, 22914-22921 (2012)

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