Scattering Matrix and Surface Modes. II

Experimental Observation of Surface and Interface Modes by Light Scattering

Comment on the Scattering-Matrix Method for Determining Defect Modes

A formulation of the scattering-matrix method for calculating localized modes at any type of planar defect has been given by Achar and Barsch' and applied to the problem of determining the surface modes of a semi-infinite NaCl crystal. Here we will consider only the application of this formulation when the defect is a surface. Similar criticisms hold for other types of defects. Achar and Barsch...

Poles and zeros of the scattering matrix associated to defect modes

We analyze electromagnetic waves propagation in one-dimensional periodic media with single or periodic defects. The study is made both from the point of view of the modes and of the diffraction problem. We provide an explicit dispersion equation for the numerical calculation of the modes, and we establish a connection between modes and poles and zeros of the scattering matrix. Periodic media wi...

Surface modes and acoustic scattering of microspheres and ultrasound contrast agents.

Surface modes of spherical objects subject to ultrasound excitation have been recently proposed to explain experimental measurements of scattering from microspheres and ultrasound contrast agents (UCAs). In this work, the relationship between surface modes and resonance frequencies of microspheres and UCAs is investigated. A finite-element model, built upon the fundamentals of wave propagation ...

Raman scattering as a probe of phonon confinement and surface optical modes in semiconducting nanowires

Raman scattering is shown to be an effective probe of optical and surface optical phonons in highly crystalline semiconducting nanowires (SNWs). We show that the confinement model of Richter et al. well describes the nanowire diameter dependence of the asymmetric broadening of the onephonon band in Si nanowires observed at ∼ 520 cm−1. We also show that the use of high laser flux (∼ 0.1 mW/μm2) ...