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

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)

Advertisements

About ateneophysicsnews
Physics News and Features from Ateneo de Manila University

%d bloggers like this: