All-Optical Ultrafast Phase-Compensation and Amplifi cation by A Multi-Photon-Arranged Diffractive Optics

By Diffractive Optics

Optical tweezer arrays and optical substrates created with diffractive optics

We describe a simple method for creating multiple optical tweezers from a single laser beam using diffractive optical elements. As a demonstration of this technique, we have implemented a 434 square array of optical tweezers—the hexadeca tweezer. Not only will diffractively generated optical tweezers facilitate many new experiments in pure and applied physics, but they also will be useful for f...

Efficient Diffractive Phase Optics for Electrons

1. Department of Physics, University of Oregon, Eugene, Oregon 2 Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland and Department of Electrical Engineering, Syracuse University, Syracuse, New York 3 National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 4 Center for Nanoscale Science ...

Two-Photon Imaging with Diffractive Optical Elements

Two-photon imaging has become a useful tool for optical monitoring of neural circuits, but it requires high laser power and serial scanning of each pixel in a sample. This results in slow imaging rates, limiting the measurements of fast signals such as neuronal activity. To improve the speed and signal-to-noise ratio of two-photon imaging, we introduce a simple modification of a two-photon micr...

Ultrafast all-optical graphene modulator.

Graphene is an optical material of unusual characteristics because of its linearly dispersive conduction and valence bands and the strong interband transitions. It allows broadband light-matter interactions with ultrafast responses and can be readily pasted to surfaces of functional structures for photonic and optoelectronic applications. Recently, graphene-based optical modulators have been de...