Giant resonant enhancement of optical binding of dielectric disks

Abstract

Two-parametric variation over the aspect ratio of each disk and distance between disks gives rise to numerous events of avoided crossing of resonances of individual disks. For these events the hybridized anti-bonding resonant modes can acquire a morphology close to the Mie resonant mode with high orbital momentum of equivalent sphere. The $Q$ factor of such resonance can exceed the $Q$ factor of isolated disk by two orders in magnitude. We show that dual incoherent counter propagating coaxial Bessel beams with power $1mW/\mu m^2$ with frequency resonant to such a anti-bonding modes result in unprecedented optical binding forces up to decades of nano Newtons for silicon micron size disks. We show also that a magnitude and sign of optical forces strongly depend on the longitudinal wave vector of the Bessel beams.

arXiv comment6 pages, 9 figures

References in corpus (10)

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• Optical binding of particles with or without the presence of a flat dielectric surface
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Cited by in corpus (2)

• Resonant bending of silicon nanowires by light
• Resonant binding of dielectric particles to metal surface without plasmonics