Observation of optical bistability in a ZnO powder random medium

Observation of optical bistability in a ZnO powder random medium

Bistability with optical beams propagating in a reorientational medium.

We investigated bistability with light beams in reorientational nematic liquid crystals. For a range of input powers, beams can propagate as either diffracting or self-trapped, the latter corresponding to spatial solitons. The first-order transition in samples exhibiting abrupt self-focusing with a threshold is in agreement with a simple model.

Optical bistability from surface plasmon excitation through a nonlinear medium

2014 The excitation of surface plasmon by attenuated total reflection can be used to get a bistable optical device. As the incident light beam propagates through a nonlinear medium, any intensity variation tunes the plasmon excitation through resonance. Furthermore, the superposition of the incident and reflected beams induces a feedback and allows bistable operation. J. Physique 45 (1984) 597-...

Observation of weak localization of light in a random medium.

Observation of bistability in a Vertical-Cavity Semiconductor Optical Amplifier (VCSOA).

We report, the first time to our knowledge, an observation of optical bistability in a Vertical-Cavity Semiconductor Optical Amplifier (VCSOA) operated in reflection mode. Counterclockwise hysteresis loops are obtained over a range of initial phase detuning and bias currents. One hysteresis loop is observed experimentally with an input power as low as 2 ìW when the device is biased at 98% of it...