Forces arising from overlap between the guided waves of parallel, microphotonic waveguides are calculated. Both attractive and repulsive forces, determined by the choice of relative input phase, are found. Using realistic parameters for a silicon-on-insulator material system, we estimate that the forces are large enough to cause observable displacements. Our results illustrate the potential for a broader class of optically tunable microphotonic devices and microstructured artificial materials.
© 2005 Optical Society of America
(200.4880) Optics in computing : Optomechanics
(230.7370) Optical devices : Waveguides
(230.7380) Optical devices : Waveguides, channeled
(250.5300) Optoelectronics : Photonic integrated circuits
Michelle L. Povinelli, Marko Loncar, Mihai Ibanescu, Elizabeth J. Smythe, Steven G. Johnson, Federico Capasso, and John D. Joannopoulos, "Evanescent-wave bonding between optical waveguides," Opt. Lett. 30, 3042-3044 (2005)