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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 19 — Sep. 13, 2010
  • pp: 20282–20288

A nanostructured Fabry-Perot interferometer

Tianhua Zhang, Zhongcheng Gong, Rebecca Giorno, and Long Que  »View Author Affiliations

Optics Express, Vol. 18, Issue 19, pp. 20282-20288 (2010)

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A polymer-based micromachined Fabry-Perot interferometer (µFPI) with embedded nanostructures in its cavity, called nanostructured-FPI, is reported. The nanostructures inside the cavity are a layer of Au-coated nanopores. As a refractive-index sensitive optical sensor, it offers the following advantages over a traditional µFPI for label-free biosensing applications, including increased sensing surface area, extended penetration depth of the excitation light and amplified optical transducing signals. For a nanostructured-FPI with nanopore size of 50 nm in diameter and the gap size of FPI cavity of 50 µm, measurements find that it has ~20 times improvement in free spectral range (FSR), ~2 times improvement in finesse and ~4 times improvement in contrast of optical transducing signals over a traditional µFPI even without any device performance optimization. Several chemicals have also been evaluated using this device. Fourier transform has been performed on the measured optical signals to facilitate the analysis of the transducing signals.

© 2010 OSA

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(130.6010) Integrated optics : Sensors
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Integrated Optics

Original Manuscript: July 13, 2010
Revised Manuscript: August 22, 2010
Manuscript Accepted: August 31, 2010
Published: September 8, 2010

Tianhua Zhang, Zhongcheng Gong, Rebecca Giorno, and Long Que, "A nanostructured Fabry-Perot interferometer," Opt. Express 18, 20282-20288 (2010)

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