Electromagnetic waves in finite superlattices with buffer and cap layers

Citation
Mlh. Lahlaouti et al., Electromagnetic waves in finite superlattices with buffer and cap layers, J OPT SOC A, 16(7), 1999, pp. 1703-1714
Citations number
31
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
ISSN journal
10847529 → ACNP
Volume
16
Issue
7
Year of publication
1999
Pages
1703 - 1714
Database
ISI
SICI code
1084-7529(199907)16:7<1703:EWIFSW>2.0.ZU;2-S
Abstract
We investigated the propagation of electromagnetic waves in a finite superl attice bounded by a substrate and vacuum and separated from them by a buffe r layer and a cap layer. In this realistic geometry, we show the existence of different kinds of localized and resonant modes whose behaviors are stro ngly dependent on the nature and thickness of the buffer and cap layers as well as on the width of the superlattice. These modes can be confined insid e the superlattice or at its boundaries and give rise to different possibil ities for the guidance of optical waves. The localized and resonant modes a re obtained from an analytic calculation of the local and total densities o f states within a Green's function formalism for electromagnetic waves of s -polarization (transverse electric). We also evaluate the reflect:ion and t ransmission coefficients and compare their behaviors with the densities of states. (C) 1999 Optical Society of America [S0740-3232(99)02807-0].