title: Finite-size effects on intensity correlations in random media.
abstract: The correlations between waves transmitted through random media are analyzed by use of a random-matrix approach and numerical simulations of rough waveguides. Although the intensity and conductance fluctuations are practically independent of the sample length, the correlations present a strong dependence on the length of the disordered region. In waveguide geometries the long-range correlations C((2)) and C((3)), usually associated to intensity and conductance fluctuations, respectively, become negative as the length of the system decreases. Our results provide a new interpretation of recent optical experiments on disordered slab geometries.
authors.affiliation: Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: García-Martín
authors.forename: F
authors.initials: F
authors.lastname: Scheffold
authors.forename: M
authors.initials: M
authors.lastname: Nieto-Vesperinas
authors.forename: J J
authors.initials: JJ
authors.lastname: Sáenz