We have analysed the propagation of two continuous-wave Ar+-laser beams travelling in opposite directions in a two-component nonlinear heterogeneous medium (the polymeric blend PMMA-EVA), in a mirror retroreflection geometry. Bistable ref-lection associated with the laser-induced suppression of scattering is observed. This phenomenon has a thermal origin. Based on light- and heat-transport theory inside the material, a simplified explanation of the experimental evidence is presented, showing the conditions for the onset of optical bistability. Qualitative agreement with our experimental results is found.
Optical bistability by nonlinear reflection in a polymeric blend / U., Bernini; L., Destefano; M., Feo; P., Mormile; Russo, Paolo. - In: APPLIED PHYSICS. B, LASERS AND OPTICS. - ISSN 0946-2171. - STAMPA. - 63:(1996), pp. 155-159. [10.1007/BF01095267]
Optical bistability by nonlinear reflection in a polymeric blend
RUSSO, PAOLO
1996
Abstract
We have analysed the propagation of two continuous-wave Ar+-laser beams travelling in opposite directions in a two-component nonlinear heterogeneous medium (the polymeric blend PMMA-EVA), in a mirror retroreflection geometry. Bistable ref-lection associated with the laser-induced suppression of scattering is observed. This phenomenon has a thermal origin. Based on light- and heat-transport theory inside the material, a simplified explanation of the experimental evidence is presented, showing the conditions for the onset of optical bistability. Qualitative agreement with our experimental results is found.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
