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