Theory of Second Harmonic Generation of Light
A theory is given for the generation of second harmonic light in crystals analogous to the classical theory of crystal optics. Optical activity and absorption are neglected, but...
Publications
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1,100 publications
Absorption enhancement in silicon-on-insulator waveguides using metal island films
We report the degree to which the resonances associated with metal island films can be used to enhance the sensitivity of very thin semiconductor photodetectors. The island film...
Simple Approach for High-Contrast Optical Imaging and Characterization of Graphene-Based Sheets
A simple optical method is presented for identifying and measuring the effective optical properties of nanometer-thick, graphene-based materials, based on the use of substrates ...
Optimal Wavelet Transform for the Detection of Microaneurysms in Retina Photographs
In this paper, we propose an automatic method to detect microaneurysms in retina photographs. Microaneurysms are the most frequent and usually the first lesions to appear as a c...
Alterations of Single Molecule Fluorescence Lifetimes in Near-Field Optical Microscopy
Fluorescence lifetimes of single Rhodamine 6G molecules on silica surfaces were measured with pulsed laser excitation, time-correlated single photon counting, and near-field sca...
Energy band-gap dependence of two-photon absorption
We present measurements of the two-photon absorption coefficients beta(2) of 10 different semiconductors having band-gap energies between 1.4 and 3.7 eV. We find that beta(2) va...
Vulnerability of South African animal taxa to climate change
Abstract The responsiveness of South African fauna to climate change events is poorly documented and not routinely incorporated into regional conservation planning. We model the...
On the Calculation of Autocorrelation Functions of Dynamical Variables
In this paper we develop a formalism for calculating the autocorrelation function of a dynamical variable in terms of a well-defined memory function. Guided by simple physical a...
Collective behavior of optically trapped neutral atoms
We describe experiments that show collective behavior in clouds of optically trapped neutral atoms. This collective behavior is demonstrated in a variety of observed spatial dis...
Scanning tunneling microscopy
Presented here is an overview of the present status and future prospects of scanning tunneling microscopy. Topics covered include the physical basis of the scanning tunneling mi...
Bright Infrared Emission from Electrically Induced Excitons in Carbon Nanotubes
We used the high local electric fields at the junction between the suspended and supported parts of a single carbon nanotube molecule to produce unusually bright infrared emissi...
Optical simulation of quantum logic
A constructive method for simulating small-scale quantum circuits by use of linear optical devices is presented. It relies on the representation of several quantum bits by a sin...