Open AccessA thin film of short oriented linear Frenkel chains as an optical bistable element
Author(s) -
В. А. Малышев,
Enrique Conejero Jarque
Publication year - 2000
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.6.000227
Subject(s) - bistability , exciton , materials science , thin film , optics , refractive index , dielectric , wavelength , saturation (graph theory) , optical bistability , condensed matter physics , fresnel equations , reflection (computer programming) , nonlinear optics , optoelectronics , physics , nanotechnology , laser , mathematics , combinatorics , computer science , programming language
A numerical study of reflectivity and transmittivity of an ensemble of short oriented linear Frenkel chains, which forms a thin film with a thickness of the order of an optical wavelength, is carried out. The eigenstates of a single chain are considered to be of a collective (excitonic) origin. A distribution of chains over lengths resulting in inhomogeneous broadening of the exciton optical transition is taken into account. We report a bistable behavior of both reflectivity and transmittivity of the film in a spectral domain close to the exciton resonance, caused by saturation of the nonlinear refraction index. Estimates of driving parameters show that thin films of oriented J-aggregates of polymethine dyes deposited on a dielectric substrate seem to be a suitable object for observation of the predicted behavior.