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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 12 — Nov. 10, 2009

Light-induced terahertz optical activity

Natsuki Kanda, Kuniaki Konishi, and Makoto Kuwata-Gonokami  »View Author Affiliations

Optics Letters, Vol. 34, Issue 19, pp. 3000-3002 (2009)

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We propose and demonstrate a simple method to induce optical activity in the terahertz (THz) region using photoexcited carriers in a semiconductor substrate with metal two-dimensional chiral masks, which does not show optical activity without photoexcitation. The three-dimensional chirality induced by the combination of photocarriers and metal mask gives rise to the optical activity. With this simple method, we can develop THz polarization modulation techniques applicable for biology, chemistry, and material sciences.

© 2009 Optical Society of America

OCIS Codes
(120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
(160.1585) Materials : Chiral media
(310.5448) Thin films : Polarization, other optical properties
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:

Original Manuscript: July 1, 2009
Revised Manuscript: August 18, 2009
Manuscript Accepted: September 1, 2009
Published: September 29, 2009

Virtual Issues
Vol. 4, Iss. 12 Virtual Journal for Biomedical Optics

Natsuki Kanda, Kuniaki Konishi, and Makoto Kuwata-Gonokami, "Light-induced terahertz optical activity," Opt. Lett. 34, 3000-3002 (2009)

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