We describe a mechanism and propose design strategies to selectively tailor repulsive–gradient-optical forces between parallel, nanophotonic waveguides via morphology augmented by slow-light band-edge modes. We show that at small separation lengths, the repulsive force can be made nearly 2 orders of magnitude larger than that of standard dielectric waveguides with a square cross section. The increased coupling interactions should enable a wider dynamic range of optomechanical functionality for potential applications in sensing, switching, and nanoelectromechanical systems.
© 2011 Optical Society of America
Original Manuscript: August 22, 2011
Revised Manuscript: October 24, 2011
Manuscript Accepted: October 25, 2011
Published: November 28, 2011
Ardavan Oskooi, Pedro A. Favuzzi, Yoichi Kawakami, and Susumu Noda, "Tailoring repulsive optical forces in nanophotonic waveguides," Opt. Lett. 36, 4638-4640 (2011)