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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 20 — Jul. 10, 2012
  • pp: 4589–4596

Terahertz modulator based on insulator–metal transition in photonic crystal waveguide

Fei Fan, Yu Hou, Zi-Wei Jiang, Xiang-Hui Wang, and Sheng-Jiang Chang  »View Author Affiliations


Applied Optics, Vol. 51, Issue 20, pp. 4589-4596 (2012)
http://dx.doi.org/10.1364/AO.51.004589


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Abstract

A terahertz modulator based on the insulator–metal transition (IMT) in a photonic crystal waveguide (PCW) coated by vanadium dioxide (VO2) film is proposed. The numerical simulations show that a dielectric state and a metallic state with quite different photonic band structures and transmission properties in the proposed PCW are reciprocally converted because of the IMT of VO2, and the pass-bands of this PCW are greatly shifted from 0.68 to 0.8 and 1.02 to 1.25 THz to 0.8–1.45 THz. This PCW significantly enhances the modulation depth and sensitivity compared with bare VO2 film. Extensive investigation demonstrates that the thickness of VO2 film greatly affects the IMT process in the PCW, and limits the ultimate modulation depth of the device. The proposed modulation scheme will be of great significance for potential THz applications.

© 2012 Optical Society of America

OCIS Codes
(230.4110) Optical devices : Modulators
(260.3090) Physical optics : Infrared, far
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Integrated Optics

History
Original Manuscript: March 19, 2012
Revised Manuscript: May 22, 2012
Manuscript Accepted: May 24, 2012
Published: July 2, 2012

Citation
Fei Fan, Yu Hou, Zi-Wei Jiang, Xiang-Hui Wang, and Sheng-Jiang Chang, "Terahertz modulator based on insulator–metal transition in photonic crystal waveguide," Appl. Opt. 51, 4589-4596 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-20-4589

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