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Optical Engineering

Fluid-enhanced tunable diffraction with an elastomeric grating
Author(s): Caironesa T. Pada; Raphael A. Guerrero
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Paper Abstract

We replicate a diffraction grating by soft lithography. Tunable diffraction is accomplished by modifying groove spacing through the application of strain on the elastomeric replica. The range of strain-variable diffraction angles is extended by adding a refracting liquid layer to the grating. Using a water layer, the diffraction angle is tuned from 38 to 33.4 deg with an applied strain of 17.7%. With an equal amount of strain, employing a glycerol layer results in the diffraction angle varying from 38.8 to 34.4 deg. Our experimental results are accurately described by the combined effects of diffraction by a deformable grating and refraction by a fluid with a curved surface.

Paper Details

Date Published: 2 May 2017
PDF: 6 pages
Opt. Eng. 56(5) 054101 doi: 10.1117/1.OE.56.5.054101
Published in: Optical Engineering Volume 56, Issue 5
Show Author Affiliations
Caironesa T. Pada, Ateneo de Manila Univ. (Philippines)
Raphael A. Guerrero, Ateneo de Manila Univ. (Philippines)

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