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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 30 — Oct. 20, 2009
  • pp: 5647–5654

Design and fabrication of a spatial light modulator using thermally tunable grating and a thin-film heater

Mohammadreza Riahi, Hamid Latifi, Abbas Madani, and Ali Moazzenzadeh  »View Author Affiliations


Applied Optics, Vol. 48, Issue 30, pp. 5647-5654 (2009)
http://dx.doi.org/10.1364/AO.48.005647


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Abstract

We propose the application of a thermally tunable grating as a spatial light modulator. The grooves of a square-well grating are filled with a liquid whose refractive index depends on temperature. The variation of optical characteristics of such a grating with respect to temperature is investigated theoretically and also by simulation and experiment. A thin-film heater is then used as a heat source. The relation between intensity of the first order of diffraction versus power consumption of the thin-film heater is investigated. Finally, a thin-film heater with a desired pattern is placed at the surface of the grating to fabricate spatial light modulator. By applying electrical current to different elements of the thin-film heater, the fabricated device can project a desired pattern on a screen using a 4 f imaging system. The restrictions of such a device are discussed and another structure is proposed and discussed by numerical calculations to increase the ability of the device.

© 2009 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(230.3990) Optical devices : Micro-optical devices
(230.6120) Optical devices : Spatial light modulators

ToC Category:
Diffraction and Gratings

History
Original Manuscript: March 27, 2009
Revised Manuscript: July 16, 2009
Manuscript Accepted: September 17, 2009
Published: October 12, 2009

Citation
Mohammadreza Riahi, Hamid Latifi, Abbas Madani, and Ali Moazzenzadeh, "Design and fabrication of a spatial light modulator using thermally tunable grating and a thin-film heater," Appl. Opt. 48, 5647-5654 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-30-5647

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