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Proceedings Paper

Environmentally responsive active optics based on hydrogel-actuated deformable mirror arrays
Author(s): Philseok Kim; Lauren D. Zarzar; Mughees Khan; Michael Aizenberg; Joanna Aizenberg
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Paper Abstract

We report hybrid polymer actuator arrays based on environmentally responsive hydrogel and actuatable optical microstructures that are designed to reversibly switch optical properties in response to the environment. Arrays of micrometer scale plates were patterned by deep reactive ion etching of silicon which served as master structures for replica molding in polydimethylsiloxane (PDMS). UV-curable epoxy was cast in a metal-sputtered PDMS mold to transfer a thin metal film onto each microplate to form a micromirror array. Polyelectrolyte hydrogel, such as poly(acrylamide-co-acrylic acid), was patterned on the micromirror array and acted as an artificial muscle, bending the micromirrors in response to the change in humidity or pH. Such hybrid systems showed reversible switching between high transmittance (low reflectivity) and low transmittance (high reflectivity) without the aid of external power. Our design of hybrid actuated optics opens a broad avenue for developing environmentally responsive adaptive and active optics.

Paper Details

Date Published: 8 February 2011
PDF: 7 pages
Proc. SPIE 7927, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics IV, 792705 (8 February 2011); doi: 10.1117/12.879034
Show Author Affiliations
Philseok Kim, Harvard Univ. (United States)
Lauren D. Zarzar, Harvard Univ. (United States)
Mughees Khan, Harvard Univ. (United States)
Michael Aizenberg, Harvard Univ. (United States)
Joanna Aizenberg, Harvard Univ. (United States)

Published in SPIE Proceedings Vol. 7927:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics IV
Winston V. Schoenfeld; Jian Jim Wang; Marko Loncar; Thomas J. Suleski, Editor(s)

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