Numerical and experimental studies show that a wavepacket of internal gravity waves may be partially re ected from and transmitted into a region where the wave intrinsic frequency is comparable to the background buoyancy frequency. The departure of the propagation behaviour from that predicted by ray theory is examined in detail. In particular, weakly nonlinear e ects are shown to play a signi ...

We investigate the influence of the phase front curvature of an input light beam on the transverse localization of light, choosing an evanescently coupled disordered one-dimensional semi-infinite waveguide lattice as an example. Our numerical study reveals that a finite phase front curvature of the input beam does indeed play an important role and it could degrade the quality of light localizat...

In the last decade, significant theoretical advances were obtained for steady-state fracture propagation in spring-mass lattice structures, that also revealed surprising fracture regimes. Very few articles exist, however, on the dynamic fracture processes in lattices composed of beams. In this paper we analyse a failure (feeding) wave propagating in a beam-made lattice strip with periodically p...

We demonstrate an electrically pumped silicon evanescent laser incorporating AlGaInAs quantum wells with a silicon waveguide. The device operates continuous wave with a threshold of 65 mA and a fiber coupled output power of 1.8 mW.

We show that multiple reabsorption of resonance-frequency photons in a cloud of evanescent-wave cooled atoms can have a significant influence on the cooling efficiency and maximum value of the atomic phase-space density.

Two-photon fluorescence microscopy is a powerful method for many applications. Because of the ability of strong attenuation of the background fluorescence, total internal reflection fluorescence microscopy (TIRFM) has been the major technique in the fluorescence imaging and single molecule detections. Recently, we have developed a new type of TIRFM called scanning TIRFM (henceforth abbreviated ...

We have demonstrated a surface plasmon polariton mediated optical Moiré effect by inserting a silver slab between two subwavelength gratings. Enhancement of the evanescent fields by the surface plasmon excitations on the silver slab leads to a remarkable contrast improvement in the Moiré fringes from two subwavelength gratings. Numerical calculations, which agree very well with the experimental...

Statistical properties of Wigner delay times and the effect of evanescent modes on the deterministic scattering of an electron matter wave from a classically chaotic 2-d electron waveguide are studied for the case of 2, 6, and 16 propagating modes. Deterministic reaction matrix theory for this system is generalized to include the effect of evanescent modes on the scattering process. The statist...

Green fluorescent protein fused to human chromogranin B or neuropeptide Y was expressed in PC12 cells and caused bright, punctate fluorescence. The fluorescent points colocalized with the endogenous secretory granule marker dopamine beta-hydroxylase. Stimulation of live PC12 cells with elevated [K+], or of permeabilized PC12 cells with Ca2+, led to Ca2+-dependent loss of fluorescence from neuri...