Results 171 to 180 of about 187,701 (187)
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SPIE Proceedings, 2013
We show how transformation optics can enhance optical gradient forces between two optical waveguides by several orders of magnitude. The technique is based on a coordinate transformation that alters the perceived distance between the waveguides. This transformation can be implemented using single-negative metamaterial thin films.
Ginis, Vincent +3 more
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We show how transformation optics can enhance optical gradient forces between two optical waveguides by several orders of magnitude. The technique is based on a coordinate transformation that alters the perceived distance between the waveguides. This transformation can be implemented using single-negative metamaterial thin films.
Ginis, Vincent +3 more
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Metamaterials enhancing optical forces
SPIE Proceedings, 2014The interaction between light and matter involves not only an energy transfer, but also the transfer of linear momentum. In everyday life applications this linear momentum of light is too small to play any significant role. However, in nanoscale dimensions, the associated optical forces start to play an increasingly important role.
Ginis, Vincent +3 more
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Non-conservative optical forces
Reports on Progress in Physics, 2017Undoubtedly, laser tweezers are the most recognized application of optically induced mechanical action. Their operation is usually described in terms of conservative forces originating from intensity gradients. However, the fundamental optical action on matter is non-conservative.
Sukhov, Sergey, Dogariu, Aristide
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Biological Applications of Optical Forces
Annual Review of Biophysics and Biomolecular Structure, 1994D ESIGN CON SID ERATION S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 Bll/ding a Trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 Beam Steering 254 Trapping Lasers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steven M. Block, Karel Svoboda
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Optical Transduction of Chemical Forces
Nano Letters, 2007We describe a plasmonic crystal device possessing utility for optically transducing chemical forces. The device couples complex plasmonic fields to chemical changes via a chemoresponsive, surface-bound hydrogel. We find that this architecture significantly enhances the spectroscopic responses seen at visible wavelengths while enabling capacities for ...
Ralph G. Nuzzo +5 more
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Force tracing: a method to sculpt the optical force
Optical Trapping and Optical Micromanipulation XIV, 2017A brief description of the long-standing problem of the optical momentum in media and its resolution is given. The method of force tracing to trace optical force fields along the trajectories of light rays is reviewed and a few illustrative examples are shown.
Alireza Akbarzadeh, Christophe Caloz
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A cavity effect on optical forces
IEEE Photonic Society 24th Annual Meeting, 2011Using an analytically solvable model of a nanoparticle interacting with a spherical optical resonator we show that particle-induced modification of the cavity mode renders standard gradient approximation for the optomechanical interaction invalid.
Lev I. Deych, J. T. Rubin
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Optically induced 'negative forces'
Nature Photonics, 2012Attracting objects with optical beams may seem like science fiction, but various schemes already do this, albeit with some caveats and limitations. The most recent progress in this emerging field is reviewed, with particular emphasis on manipulation of small objects by optically induced 'negative forces'.
Juan José Sáenz +3 more
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Optics and intermolecular forces
Molecular Physics, 1986The influence of long-range intermolecular forces upon the refractive index and optical rotation of molecular fluids is examined using quantum electrodynamics and many-body theory. An expression for this effect, analogous to the McLachlan formula for the dispersion energy, and involving the molecular polarizability and second hyperpolarizability, is ...
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Optical forces in plasmonic nanoantennas
Quantum Electronics, 2012The optical forces acting on nanoparticles in V-shaped plasmonic resonators with a high local-field gain have been investigated. Two versions are considered, which make it possible to implement either attractive or repulsive gradient optical forces. A plasmonic resonator is proposed, which can focus 350-nm radiation and implement a repulsive gradient ...
Alexander S. Shalin +2 more
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