BULK POLARITON BEATINGS AND 2-DIMENSIONAL RADIATIVE DECAY - ANALYSIS OF TIME-RESOLVED TRANSMISSION THROUGH A DISPERSIVE FILM

Citation
G. Panzarini et Lc. Andreani, BULK POLARITON BEATINGS AND 2-DIMENSIONAL RADIATIVE DECAY - ANALYSIS OF TIME-RESOLVED TRANSMISSION THROUGH A DISPERSIVE FILM, Solid state communications, 102(7), 1997, pp. 505-509
Citations number
37
Categorie Soggetti
Physics, Condensed Matter
Journal title
ISSN journal
00381098
Volume
102
Issue
7
Year of publication
1997
Pages
505 - 509
Database
ISI
SICI code
0038-1098(1997)102:7<505:BPBA2R>2.0.ZU;2-#
Abstract
The time-resolved transmission (TRT) through a slab described by a loc al dielectric function with resonance behavior is studied. For films w ith a thickness d > lambda(where X is the wavelength of light in the c rystal) an analytic formula which describes the recently observed pola riton beatings [Frohlich, D. et al., Phys. Rev. Lett. 67, 1991, 2343] is obtained. For d < lambda the TRT is expressed in terms of the norma l modes of the slab: the radiative decay of the quasi-two-dimensional excitation is recovered when only the lowest modes contribute, as it h appens for very narrow slabs, while the interference between different modes evolves into the polariton beatings on increasing the film thic kness. (C) 1997 Elsevier Science Ltd.