Light diffusion and localization in three-dimensional nonlinear disordered media

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.033812· OSTI ID:20982403

Conti, C ^[1]; Angelani, L ^[2]; Ruocco, G ^[3]

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1. Centro Studi e Ricerche 'Enrico Fermi', Via Panisperna 89/A, I-00184, Roma (Italy)
2. Research Center SMC INFM-CNR, c/o Universita di Roma 'La Sapienza', I-00185 Roma (Italy)
3. Research Center Soft INFM-CNR, c/o Universita di Roma 'La Sapienza', I-00185 Roma (Italy)

By using a three-dimensional finite-difference time-domain parallel code, the linear and nonlinear propagation of light pulses in a disordered assembly of scatterers, generated by a molecular dynamics code, is simulated. We calculate the static and dynamical light diffusion constant and the transmission in the presence of localized states. We numerically demonstrate the 'modulational instability random laser': at high input peak power, energy is transferred to localized states from the input pulse, resulting in a power-dependent nonexponential time decay of the transmitted pulse.

• OSTI ID: 20982403
• Journal Information: Physical Review. A, Vol. 75, Issue 3; Other Information: DOI: 10.1103/PhysRevA.75.033812; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
DECAY
DIFFUSION
INSTABILITY
LASER RADIATION
LIGHT SCATTERING
LIGHT TRANSMISSION
MOLECULAR DYNAMICS METHOD
NONLINEAR PROBLEMS
PULSES
RANDOMNESS
THREE-DIMENSIONAL CALCULATIONS