Light-driven nanomotors with reciprocating motion and high controllability based on interference techniques.

In this paper, we investigate the controlled movement of optically trapped nano-particles in an interference optical lattice. The suggested interferometric optical tweezers setup utilizes the superposition of three orthogonal Gaussian standing waves to create 3D optical lattices. Dynamic control over the constructed lattices can be achieved simply by changing the incident beam parameters using a polarizer or a phase shifter.

Rigorous electromagnetic theory for waveguide evanescent field fluorescence microscopy.

Recently, waveguide evanescent field fluorescence (WEFF) microscopy was introduced and used to image and analyze cell-substrate contacts. Here, we establish a comprehensive electromagnetic theory in a seven-layer structure as a model for a typical waveguide-cell structure appropriate for WEFF microscopy and apply it to quantify cell-waveguide separation distances. First, electromagnetic fields at the various layers of a model waveguide-cell system are derived.