giant goos-hänchen shifts in polaritonic materials doped with nanoparticles

We analyze the goos-hänchen (gh) shifts in polaritonic materials doped with nanoparticles inside a cavity. the effect of dipole-dipole interaction (ddi) has been used as an interesting phenomenon to investigating giant gh shifts in transmitted and reflected beams. it is found that the giant positive and negative gh shifts can be obtained simultaneously in transmitted and reflected light beams. moreover, the group velocity of reflected and transmitted light beams has been discussed in details by analyzing the gh shifts in transmitted and reflected lights. our proposed model opens up a new way for manipulating the gh shifts in polaritonic materials doped with nanoparticles.