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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 17 — Sep. 1, 2012
  • pp: 3510–3512

Dynamics of photo-induced terahertz optical activity in metal chiral gratings

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


Optics Letters, Vol. 37, Issue 17, pp. 3510-3512 (2012)
http://dx.doi.org/10.1364/OL.37.003510


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Abstract

We investigated the dynamics of photo-induced optical activity of metal chiral gratings on an Si substrate for terahertz (THz) waves. We employed a new technique that enables optical-pump and THz-probe measurements via broadband THz spectroscopy at the microsecond time scale using a low-repetition-rate pump and a high-repetition-rate probe. We revealed that the THz optical activity decays as a result of the carrier diffusion effect because this optical activity is because of the presence of three-dimensional chiral structures of photo-carriers in the Si substrate.

© 2012 Optical Society of America

OCIS Codes
(320.4240) Ultrafast optics : Nanosecond phenomena
(300.6495) Spectroscopy : Spectroscopy, teraherz
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Spectroscopy

History
Original Manuscript: May 18, 2012
Revised Manuscript: July 18, 2012
Manuscript Accepted: July 19, 2012
Published: August 20, 2012

Citation
Natsuki Kanda, Kuniaki Konishi, and Makoto Kuwata-Gonokami, "Dynamics of photo-induced terahertz optical activity in metal chiral gratings," Opt. Lett. 37, 3510-3512 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-17-3510


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