Optical Study of Electromagnetic Surface Modes in Microcrystals

Abstract

This paper discusses the fundamental aspects of theories describing the electromagnetic surface modes in microcorystals and their optical response. The relationships between the theories are emphasized, and three characteristics of the surface modes are summarized. Observed infrared spectra of MgO microcrystals and Raman spectra of GaP microcrystals are presented to illustrate how the surface phonon modes can be identified experimentally. The effect of surface plasmon resonance in an Ag-island film on the absorption and Raman scattering of a copper phthalocyanine (dye) coating is also discussed. Comments are also made on the extension of surface mode spectroscopy and related topics.