Ultrafast all‐optical switching in semiconductor nonlinear directional couplers at half the band gap

Phase Space Description of Nonlinear Directional Couplers

Absfrucf-A comprehensive analysis of the symmetric nonlinear directional coupler as a function of the excitation conditions is reported. The analysis is based on a coupled-mode technique in normalized (dimensionless) parameters, using the linear supermodes of the guiding structure, most of the results being derived from the Hamiltonian of the resulting nonlinear equations. The exchange of power...

Temporal dynamics of all-optical switching in quadratic nonlinear directional couplers

Switching dynamics of solitons in fiber directional couplers.

A simple analytical approach based on a variational formalism is applied to an analysis of the switching dynamics of solitons in fiber nonlinear directional couplers. It is demonstrated that soliton switching may be described by a simplified Hamiltonian model that displays three different regimes of soliton dynamics, depending on the universal parameter, which is the ratio of the squared intens...

Ultrafast band-gap oscillations in iron pyrite

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. With its combination of favorable band gap, high absorption coefficient, material abundance, and low cost, iron pyr...

Aspects of Ultrafast Spark Gap Switching

J.M. Lehr, C.E. Baum, W.D. Prather and F.J. Agee High Energy Sources Division, Phillips Laboratory Kirtland AFB, New Mexico 87117 The Air Force is interested in compact ultra-wideband systems which utilize a minimum volume of high pressure gas. These desires lead us to look closely at single channel spark gaps, because both the size and volume of gas, for example, hydrogen, under pressure can b...