Exploiting Optical Asymmetry for Controlled Guiding of Particles with Light

Sunday January 17th, 2016 Hrvoje Buljan 0

ABSTRACT: Conventional methods of manipulating particles with light, such as optical tweezers and optical tractor beams, rely on beamshaping to realize complex electromagnetic field profiles and are thus sensitive to scattering. Here, we show that, by introducing tailored optical asymmetry in the particle, we can realize a novel guiding method that is controllable by […]

The Harper–Hofstadter Hamiltonian and conical diffraction in photonic lattices with grating assisted tunneling

Friday January 1st, 2016 leo 0

ABSTRACT: We propose the realization of a grating assisted tunneling scheme for tunable synthetic magnetic fields in optically induced one- and two-dimensional dielectric photonic lattices. As a signature of the synthetic magnetic fields, we demonstrate conical diffraction patterns in particular realization of these lattices, which possess Dirac points in k-space. We compare the […]