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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 3 — Feb. 29, 2012

Laser-written nanoporous silicon ridge waveguide for highly sensitive optical sensors

Jinan Xia, Andrea M. Rossi, and Thomas E. Murphy  »View Author Affiliations


Optics Letters, Vol. 37, Issue 2, pp. 256-258 (2012)
http://dx.doi.org/10.1364/OL.37.000256


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Abstract

We report that low-loss ridge waveguides are directly written on nanoporous silicon layers by using an argon-ion laser at 514 nm up to 100 mW. Optical characterization of the waveguides indicates light propagation loss lower than 0.5dB/cm at 1550 nm after oxidation. A Mach–Zehnder interferometer sensor is experimentally demonstrated using the waveguide in its sensing branch, and analytical results indicate that very high sensitivity can be achieved. With large internal surface area, versatile surface chemistry, and adjustable index of refraction of porous silicon, the ridge waveguides can be used to configure Mach–Zehnder interferometers, Young’s interferometers, and other photonic devices for highly sensitive optical biosensors and chemical sensors as well as other applications.

© 2012 Optical Society of America

OCIS Codes
(220.4610) Optical design and fabrication : Optical fabrication
(230.7370) Optical devices : Waveguides
(160.4236) Materials : Nanomaterials

ToC Category:
Optical Devices

History
Original Manuscript: October 12, 2011
Revised Manuscript: November 29, 2011
Manuscript Accepted: November 29, 2011
Published: January 13, 2012

Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Jinan Xia, Andrea M. Rossi, and Thomas E. Murphy, "Laser-written nanoporous silicon ridge waveguide for highly sensitive optical sensors," Opt. Lett. 37, 256-258 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-37-2-256


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