Light propagating through an optically anisotropic resonant medium excites coherent Raman fields that propagate together with the original wave; the interference between the two fields generates the well-known Raman beats. We solve the coupled-wave equations for finite optical path lengths and show how the coherent exchange of energy between the two fields leads to interference effects that dis...

A little-used interferometric modification to the classical Hartmann optical test is being used for active optics corrections at the 6.5-m Multiple Mirror Telescope (MMT) Observatory. The technique produces compact interference spots whose positions depend on discrete wave-front phase-difference errors. A diffraction model illustrates the formation of interference spots. The limitations on wave...

Two new experiments were created to characterize the elasticity of soft tissue using sonoelastography. In both experiments the spectral variance image displayed on a GE LOGIC 700 ultrasound machine shows a moving interference pattern that travels at a very small fraction of the shear wave speed. The goal of this paper is to devise and test algorithms to calculate the speed of the moving interfe...

We propose and demonstrate an approach to measuring the biphoton temporal wave function with polarization-dependent and time-resolved two-photon interference. Through six sets of two-photon interference measurements projected onto different polarization subspaces, we can reconstruct the amplitude and phase functions of the biphoton temporal waveform. For the first time, we apply this technique ...

We consider relativistic deformations of interfering paraxial waves moving in the transverse direction. Owing to superluminal transverse phase velocities, noticeable deformations of the interference patterns arise when the waves move with respect to each other with non-relativistic velocities. Similar distortions also appear on a mutual tilt of the interfering waves, which causes a phase delay ...

We extend earlier theoretical work on the creation of autoionizing wave packets by a single laser pulse to the case where the autoionizing states are excited by two or more laser pulses. The calculations are performed using R-matrix methods combined with time-dependent multichannel quantum-defect theory. Atoms or molecules that are coherently excited into autoionizing states emit electrons in a...

4 Binary WIF Logic Design _____________________________________________________________ 11 4.1 Binary WIF Full Adder ______________________________________________________________ 12 4.2 Parallel Counters ____________________________________________________________________ 14 4.3 Benchmarking Binary WIF Circuits vs. CMOS ___________________________________ 16 4.4 WIF Topology Exploration ______...

To gain insight into the neural events responsible for visual perception of static and dynamic optical patterns, we study how neural activation spreads in arrays of inhibition-stabilized neural networks with nearest-neighbor coupling. The activation generated in such networks by local stimuli propagates between locations, forming spatiotemporal waves that affect the dynamics of activation gener...