observation of optical bistability in a polaritonic material doped with nanoparticles

We study the optical bistability and multistability in a defect structure doped with polaritonic materials and three-level nanoparticles. it is realized that the threshold of optical bistability can be manipulated by some controllable parameters such as rabi frequency, line width of upper level, and thickness of defect structure. due to dense doping of three-level nanoparticles, the dipole-dipole interactions (ddi) between nanoparticles become important. therefore, the ddi has been considered as an interesting mechanism for transition from optical bistability to multistability. the line width effect of upper level and thickness of defect structure on threshold of optical multistability has also been investigated. we hope that our proposed model be useful for developing the future all-optical devices in nanoscales.