Structure Dependence of Radiation-Matter Interaction in Arrays of Resonant Units
Tomoe Ikawa, Kikuo Cho
Combining the two enhancement mechanisms of radiation-matter interaction, one in long wavelength regime (LWR) and the other via resonant Bragg reflection, we systematically studied the coupling strengths of various arrays of resonant units. As a general measure of the coupling strength, the radiative width of each resonance was calculated according to the first-principles theory of microscopic nonlocal response of matter. A numerical study was carried out for three resonant Bragg arrangements of (A) N atoms, (B) N chains of atoms, and (C) N planes of atoms. Different aspects of enhancement are clarified as the size-linear increase in LWR and its dimensionality dependence, the speed-up effect of decay, and the super-enhancement effect due to all these mechanisms in case (C) with its saturation behavior for large N.
Journal of the Physical Society of Japan•May 15, 2002•4 citations