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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 10 — May. 15, 2014
  • pp: 3066–3069

Optically controlled background-free terahertz switching in chiral metamaterial

T. T. Lv, Z. Zhu, J. H. Shi, C. Y. Guan, Z. P. Wang, and T. J. Cui  »View Author Affiliations


Optics Letters, Vol. 39, Issue 10, pp. 3066-3069 (2014)
http://dx.doi.org/10.1364/OL.39.003066


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Abstract

We demonstrate a multiband background-free terahertz (THz) switch in photoactive chiral metamaterial using polarization conversion. Orthogonal arrangement of two asymmetrical split-ring apertures allows a high polarization conversion efficiency and low copolarization transmission. The chiral metamaterial embedded with photoactive silicon promises a dynamic control on cross-polarization transmission and thus enables an efficient background-free THz switch. The on/off state of THz metamaterial switching can be efficiently controlled by an optical pump. The realization of a cross-polarization THz switch provides a new mechanism of mode switching to control THz wave propagation and will be a promising candidate for polarization devices.

© 2014 Optical Society of America

OCIS Codes
(260.5150) Physical optics : Photoconductivity
(260.5430) Physical optics : Polarization
(160.1585) Materials : Chiral media
(160.3918) Materials : Metamaterials

ToC Category:
Materials

History
Original Manuscript: February 21, 2014
Revised Manuscript: April 14, 2014
Manuscript Accepted: April 17, 2014
Published: May 15, 2014

Citation
T. T. Lv, Z. Zhu, J. H. Shi, C. Y. Guan, Z. P. Wang, and T. J. Cui, "Optically controlled background-free terahertz switching in chiral metamaterial," Opt. Lett. 39, 3066-3069 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-3066


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