Azobenzene-compound-based photomechanical actuator devices

Xianjun Ye; Mark G. Kuzyk

doi:10.1117/12.928879

15 October 2012 Azobenzene compound-based photomechanical actuator devices

Xianjun Ye, Mark G. Kuzyk

Proceedings Volume 8519, Nanophotonics and Macrophotonics for Space Environments VI; 85190I (2012) https://doi.org/10.1117/12.928879
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

It has been shown that the chromophore disperse red 1 azobenzene (DR1) when doped into poly(methyl methacrylate) (PMMA) optical fiber can be used to make an optical cantilever in which an asymmetrically propagating beam at 633nm causes the fiber to bend. The fast response process is purported to be due to elongation of the material as molecules change between cis and trans isomers. In our work, UV light of 350nm will be used to investigate trans to cis somerization, which should induce contraction. Short fiber segments in a three-contactpoint geometry will be used to control the position and tilt of silver- or aluminum-coated coverslips that together with microscope glass slides as the substrate make optically-actuated beam-controlling mounts and Fabry-Perot interferometers. A Michelson interferometer is used to measure the length change of the fiber actuator. Azodye doped liquid crystal (LC) elastomers have been demonstrated to have a photomechanical effect that is at least ten times bigger than thermoplastic-based polymer fiber. However, the optical quality of thermoplastics are much better, enabling the cascading of devices in series. We will report on visible and UV laser-actuation of LC elastomer and polymer device structures using a quadrant photodetector to record the beam deflection caused by the shape change of the material, which will allow for dynamical measurements of the mechanisms. All measurements will be calibrated against a piezoelectric crystal actuator. Photomechanical devices provide an inexpensive but versatile, small-form factor, vibration free and high precision solution to optomechanics, sensing, positioning and other space applications.

Citation Download Citation

Xianjun Ye and Mark G. Kuzyk "Azobenzene compound-based photomechanical actuator devices", Proc. SPIE 8519, Nanophotonics and Macrophotonics for Space Environments VI, 85190I (15 October 2012); https://doi.org/10.1117/12.928879

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