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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 22372–22382

Giant transverse optical forces in nanoscale slot waveguides of hyperbolic metamaterials

Yingran He, Sailing He, Jie Gao, and Xiaodong Yang  »View Author Affiliations


Optics Express, Vol. 20, Issue 20, pp. 22372-22382 (2012)
http://dx.doi.org/10.1364/OE.20.022372


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Abstract

Here we demonstrate that giant transverse optical forces can be generated in nanoscale slot waveguides of hyperbolic metamaterials, with more than two orders of magnitude stronger compared to the force created in conventional silicon slot waveguides, due to the nanoscale optical field enhancement and the extreme optical energy compression within the air slot region. Both numerical simulation and analytical treatment are carried out to study the dependence of the optical forces on the waveguide geometries and the metamaterial permittivity tensors, including the attractive optical forces for the symmetric modes and the repulsive optical forces for the anti-symmetric modes. The significantly enhanced transverse optical forces result from the strong optical mode coupling strength between two metamaterial waveguides, which can be explained with an explicit relation derived from the coupled mode theory. Moreover, the calculation on realistic metal-dielectric multilayer structures indicates that the predicted giant optical forces are achievable in experiments, which will open the door for various optomechanical applications in nanoscale, such as optical nanoelectromechanical systems, optical sensors and actuators.

© 2012 OSA

OCIS Codes
(230.7370) Optical devices : Waveguides
(160.3918) Materials : Metamaterials
(250.5403) Optoelectronics : Plasmonics
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Metamaterials

History
Original Manuscript: June 15, 2012
Revised Manuscript: August 29, 2012
Manuscript Accepted: August 30, 2012
Published: September 14, 2012

Citation
Yingran He, Sailing He, Jie Gao, and Xiaodong Yang, "Giant transverse optical forces in nanoscale slot waveguides of hyperbolic metamaterials," Opt. Express 20, 22372-22382 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-20-22372


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