# Ateneo Photonics Laboratory publishes in Applied Optics 2010: Deformable curvature and beam scanning with an elastomeric concave grating actuated by a shape memory alloy

July 6, 2010 3 Comments

Dr. Raphael Guerrero and his two undergraduate students Michelle Wynne C. Sze and Jose Ramon A. Batiller have a new paper in Applied Optics:

**Deformable curvature and beam scanning with an elastomeric concave grating actuated by a shape memory alloy**

Abstract. A concave diffraction grating with a tunable radius of curvature R is fabricated by embedding a nitinol wire within an elastomeric grating replica. Curvature of the grating is controlled via the shape memory effect, where strain in the wire is recovered due to martensite–austenite phase transformations induced by resistive heating. The generated force bends the grating into a variable curvature determined by applied current. The radius of curvature for the concave grating is variable from 170 to 44 mm over a current range of 0 to 2.5 A. Actuation of R redirects the grating normal, resulting in a scanning motion of the diffracted beam.

Raphael A. Guerrero, Michelle Wynne C. Sze, and Jose Ramon A. Batiller, “Deformable curvature and beam scanning with an elastomeric concave grating actuated by a shape memory alloy,” Appl. Opt. 49, 3634-3639 (2010)

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Pingback: Ateneo Geometric Algebra Group (GAGA)+ publishes in JOSA A 2010: Oblique superposition of two elliptically polarized lightwaves using geometric algebra: is energy–momentum conserved? « ATENEO PHYSICS NEWS

Pingback: Ateneo Geometric Algebra Group publishes in JOSA A 2010: Oblique superposition of two elliptically polarized lightwaves using geometric algebra: is energy–momentum conserved? « ATENEO PHYSICS NEWS