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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 35 — Dec. 10, 2009
  • pp: 6600–6605

Design and analysis of a surface plasmon polariton modulator using the electro-optic effect

Ashwani Kumar, Siu Fung Yu, and Xiaofeng Li  »View Author Affiliations

Applied Optics, Vol. 48, Issue 35, pp. 6600-6605 (2009)

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A metal–insulator–metal (MIM) waveguide with a periodic change of dielectric materials in its insulator layer is proposed to create a voltage-controlled one-dimensional plasmonic Bragg reflector. KN b O 3 is used as one portion of the dielectric material so that the refractive index of the insulator layer can be varied by an external applied voltage. In our analysis, the transfer matrix method is employed to design and optimize the transmission spectra of the MIM waveguide Bragg reflector. The reflectivity at the on (bias voltage of 65 V ) and off (bias voltage of 65 V ) states is shown to be >74% and <7%, respectively, for the operating wavelength of 1.5 μm . The results are also verified by the finite-difference time-domain method. Furthermore, the modulation response of the MIM waveguide is studied. For the device area and average insulator layer thickness to be 10 μ m × 40 μ m and 615 nm , respectively, it is found that the turn-on reflectivity of the waveguide is only slightly reduced to 69% at the 3 dB point in comparison with 75% for its steady-state performance.

© 2009 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics

ToC Category:
Integrated Optics

Original Manuscript: August 24, 2009
Revised Manuscript: November 1, 2009
Manuscript Accepted: November 2, 2009
Published: December 1, 2009

Ashwani Kumar, Siu Fung Yu, and Xiaofeng Li, "Design and analysis of a surface plasmon polariton modulator using the electro-optic effect," Appl. Opt. 48, 6600-6605 (2009)

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