Some molecules change shape upon receiving photons of certain frequencies, but here we study light-induced deformation in ordinary dielectrics with no special optical effects. All dielectrics deform in response to light of all frequencies. We derive a dimensionless number to estimate when light can induce large deformation. For a structure made of soft dielectrics, with feature size comparable to the wavelength of light, the structure shapes the light, and the light deforms the structure. We study this two-way interaction between light and structure by combining the electrodynamics of light and the nonlinear mechanics of elasticity. We show that optical forces vary nonlinearly with deformation and readily cause optomechanical snap-through instability. These theoretical ideas may help to create optomechanical devices of soft materials, complex shapes, and small features.
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July 2015
Research-Article
Optomechanics of Soft Materials
Ruobing Bai,
Ruobing Bai
School of Engineering and Applied Sciences,
Kavli Institute for Bionano Science and Technology,
Kavli Institute for Bionano Science and Technology,
Harvard University
,Cambridge, MA 02138
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Zhigang Suo
Zhigang Suo
1
Fellow ASME
School of Engineering and Applied Sciences,
Kavli Institute for Bionano Science and Technology,
e-mail: suo@seas.harvard.edu
School of Engineering and Applied Sciences,
Kavli Institute for Bionano Science and Technology,
Harvard University
,Cambridge, MA 02138
e-mail: suo@seas.harvard.edu
1Corresponding author.
Search for other works by this author on:
Ruobing Bai
School of Engineering and Applied Sciences,
Kavli Institute for Bionano Science and Technology,
Kavli Institute for Bionano Science and Technology,
Harvard University
,Cambridge, MA 02138
Zhigang Suo
Fellow ASME
School of Engineering and Applied Sciences,
Kavli Institute for Bionano Science and Technology,
e-mail: suo@seas.harvard.edu
School of Engineering and Applied Sciences,
Kavli Institute for Bionano Science and Technology,
Harvard University
,Cambridge, MA 02138
e-mail: suo@seas.harvard.edu
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received December 20, 2014; final manuscript received February 18, 2015; published online June 3, 2015. Assoc. Editor: Erik van der Giessen.
J. Appl. Mech. Jul 2015, 82(7): 071011 (9 pages)
Published Online: July 1, 2015
Article history
Received:
December 20, 2014
Revision Received:
February 18, 2015
Online:
June 3, 2015
Citation
Bai, R., and Suo, Z. (July 1, 2015). "Optomechanics of Soft Materials." ASME. J. Appl. Mech. July 2015; 82(7): 071011. https://doi.org/10.1115/1.4030324
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