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.
© 2006 Optical Society of America
Lasers and Laser Optics
Original Manuscript: December 2, 2005
Revised Manuscript: February 6, 2006
Manuscript Accepted: February 7, 2006
Vol. 1, Iss. 6 Virtual Journal for Biomedical Optics
Miguel A. F. de Souza, Alberto Lencina, and Pablo Vaveliuk, "Controlling bichromatic emission in scattering gain media," Opt. Lett. 31, 1244-1246 (2006)