Temperature dependence of superluminal and subluminal propagation
Wei Guo
When a dielectric medium has a finite temperature, the atoms that constitute the medium are in a state of incessant motion. Propagation of a light pulse through such a medium is discussed theoretically in this paper in the classical domain. When the pulse is in resonance with the medium, it is found that the medium becomes dispersiveless when its temperature reaches a critical value, and that as the medium's temperature increases from below to above the critical value, the pulse's propagation changes from superluminal (subluminal) to subluminal (superluminal).
Journal of Optics A Pure and Applied Optics•Oct 15, 2007•4 citations