Numerical modelling of optical trapping in hollow photonic crystal cavities

Ulagalandha Perumal Dharanipathy and Romuald Houdré

Photonic crystal (PhC) devices owing to their strong confinement of electromagnetic energy are considered to be excellent candidates for on chip optical trapping of dielectric or biological particles in the nanometer range. In this work, we study and present hollow PhC cavities and characterize them for their trapping stiffness, trapping stability and variation of resonance wavelength due to the presence of various sized single particles in the cavity.

DOI

Twin-core fiber optical tweezers: an optimum designation

Farzin Emami and Ammar Rahimi Kazerooni

Twin-core fiber optical tweezers (TCFOT) can be simulated using finite difference beam propagation method. We chose a tapered TCFOT and calculated its far-field pattern. It is found that, there is an optimum for the core index to have maximum peak at far-field pattern of a tapered TCFOT. This optimum value, can achieved a maximum force on the particles trapped at the far-field region of tapered TCFOT.

DOI