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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 8 — Apr. 15, 2012
  • pp: 1391–1393

Optically controlled terahertz beam steering and imaging

Stefan Busch, Benedikt Scherger, Maik Scheller, and Martin Koch  »View Author Affiliations

Optics Letters, Vol. 37, Issue 8, pp. 1391-1393 (2012)

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We propose a spatial modulator for terahertz waves based on light induced electron plasma in photo-active semiconductors. A two-dimensional array of computer controlled light is used to create free carries in bulk silicon, which results in a spatial modulation of the transmission at terahertz frequencies. This method not only exhibits a remarkable modulation depth over a broad frequency range but also allows for an optically controlled beam steering of terahertz waves by inducing virtual grating structures. In addition, we analyze the possibility of all-optically controlled terahertz imaging.

© 2012 Optical Society of America

OCIS Codes
(300.6495) Spectroscopy : Spectroscopy, teraherz
(110.6795) Imaging systems : Terahertz imaging
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Fluorescent Luminescent Materials

Original Manuscript: December 16, 2011
Manuscript Accepted: January 30, 2012
Published: April 13, 2012

Stefan Busch, Benedikt Scherger, Maik Scheller, and Martin Koch, "Optically controlled terahertz beam steering and imaging," Opt. Lett. 37, 1391-1393 (2012)

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