title: Controlling bichromatic emission in scattering gain media.
abstract: It is experimentally shown that the competition between the two lasing modes of bichromatic emission in a dye solution with nanoparticle scatterers within the diffuse regime can be externally controlled by varying only the excitation beam diameter and the radiation detector position. It is established that this feature is a consequence of the changes in the reabsorption process strengths between monomer and dimer dye aggregates. The controllable switching of these lasing modes could open the real possibility of implementing previously suggested applications for this effect as optical switches.
authors.affiliation: Departamento de Física, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, PB Brazil.
authors.forename: Miguel A F
authors.initials: MA
authors.lastname: de Souza
authors.forename: Alberto
authors.initials: A
authors.lastname: Lencina
authors.forename: Pablo
authors.initials: P
authors.lastname: Vaveliuk