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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 19 — Jul. 1, 2012
  • pp: 4325–4332

Compact silicon diffractive sensor: design, fabrication, and prototype

Jonathan S. Maikisch and Thomas K. Gaylord  »View Author Affiliations


Applied Optics, Vol. 51, Issue 19, pp. 4325-4332 (2012)
http://dx.doi.org/10.1364/AO.51.004325


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Abstract

An in-plane constant-efficiency variable-diffraction-angle grating and an in-plane high-angular-selectivity grating are combined to enable a new compact silicon diffractive sensor. This sensor is fabricated in silicon-on-insulator and uses telecommunications wavelengths. A single sensor element has a micron-scale device size and uses intensity-based (as opposed to spectral-based) detection for increased integrability. In-plane diffraction gratings provide an intrinsic splitting mechanism to enable a two-dimensional sensor array. Detection of the relative values of diffracted and transmitted intensities is independent of attenuation and is thus robust. The sensor prototype measures refractive index changes of 104. Simulations indicate that this sensor configuration may be capable of measuring refractive index changes three or four orders of magnitude smaller. The characteristics of this sensor type make it promising for lab-on-a-chip applications.

© 2012 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(130.0130) Integrated optics : Integrated optics
(130.6010) Integrated optics : Sensors

ToC Category:
Diffraction and Gratings

History
Original Manuscript: April 4, 2012
Manuscript Accepted: May 21, 2012
Published: June 25, 2012

Citation
Jonathan S. Maikisch and Thomas K. Gaylord, "Compact silicon diffractive sensor: design, fabrication, and prototype," Appl. Opt. 51, 4325-4332 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-19-4325

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