MAGNETO-OPTICAL DIFFRACTION BY A RELIEF GRATING

Effective grating theory for resonance domain surface-relief diffraction gratings.

An effective grating model, which generalizes effective-medium theory to the case of resonance domain surface-relief gratings, is presented. In addition to the zero order, it takes into account the first diffraction order, which obeys the Bragg condition. Modeling the surface-relief grating as an effective grating with two diffraction orders provides closed-form analytical relationships between...

Optical Simulation of Grating Diffraction in MATLAB

The “Grating Diffraction Calculator” (GD-Calc) is a MATLAB-based, electromagnetic simulation program that computes diffraction efficiencies of optical grating structures, including biperiodic gratings. The program’s capabilities include a general and flexible grating modeling facility, structure parameterization (with any number of parameters), and unrestricted control over diffraction order se...

Microfluidic droplet grating for reconfigurable optical diffraction.

This Letter presents a reconfigurable optical diffraction grating using multiphase droplets on a microfluidic chip. The uniform and evenly spaced circular droplets are generated by continuously dispersing two immiscible liquids into a T junction to produce plugs, which are then transformed into a circular shape at a sudden expansion of the microchannel. In experiments, the droplet grating shows...

Atomic diffraction by a thin phase grating

We present a semiclassical perturbation method for the description of atomic diffraction by a weakly modulated potential. It proceeds in a way similar to the treatment of light diffraction by a thin phase grating, and consists in calculating the atomic wavefunction by mean~ of action integrals along the classical trajectories of the atoms in the absence of the modulated part of the potential. T...

Aplanatic grazing incidence diffraction grating: a new optical element.