2 May 2017 Fluid-enhanced tunable diffraction with an elastomeric grating
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Caironesa T. Pada, Caironesa T. Pada, Raphael A. Guerrero, Raphael A. Guerrero, } "Fluid-enhanced tunable diffraction with an elastomeric grating," Optical Engineering 56(5), 054101 (2 May 2017). https://doi.org/10.1117/1.OE.56.5.054101 . Submission: Received: 13 January 2017; Accepted: 17 April 2017
Received: 13 January 2017; Accepted: 17 April 2017; Published: 2 May 2017


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