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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 24 — Dec. 15, 2010
  • pp: 4199–4201

Enhancing the resonance quality factor in membrane-type resonant grating waveguides

Ya-Lun Tsai, Jenq-Yang Chang, Mount-Learn Wu, Zong-Ru Tu, Chien-Chieh Lee, Chih-Ming Wang, and Che-Lung Hsu  »View Author Affiliations

Optics Letters, Vol. 35, Issue 24, pp. 4199-4201 (2010)

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In this Letter, we present a method of reducing the spectral width of guided-mode resonance (GMR) in air-bridged resonant grating-waveguide structures to enhance the Q factor. The posttreatment of adding a dielectric film to the bottom of the membrane to manipulate the resonance behavior is practicable. The introduced underlayer is shown to be capable of effectively reducing the coupling and enhancing the resonant Q factor. The proposed method provides an effective means of adjusting the resonance property without varying the original GMR structure. The results also imply that TM resonance is more feasible for achieving narrow resonance and potentially in sensing applications, because it has higher sensitivity than TE resonance.

© 2010 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(130.0130) Integrated optics : Integrated optics
(050.6624) Diffraction and gratings : Subwavelength structures
(130.5440) Integrated optics : Polarization-selective devices

ToC Category:
Diffraction and Gratings

Original Manuscript: October 15, 2010
Revised Manuscript: October 15, 2010
Manuscript Accepted: November 2, 2010
Published: December 14, 2010

Ya-Lun Tsai, Jenq-Yang Chang, Mount-Learn Wu, Zong-Ru Tu, Chien-Chieh Lee, Chih-Ming Wang, and Che-Lung Hsu, "Enhancing the resonance quality factor in membrane-type resonant grating waveguides," Opt. Lett. 35, 4199-4201 (2010)

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