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Steady-state two-level population inversion using photonic crystals
Hiroyuki Takeda

Last modified: 2012-01-03


It is generally considered that steady-state population inversion is impossible in
two-level systems. However, if it were possible to achieve two-level population inversion, it might
provide new applications for optical materials. From this scientific interest, possibility of two-level
population inversion has been discussed for a long time. Photonic crystals composed of periodic
dielectric materials are considered as powerful candidates to achieve two-level population inversion
at steady-states. I investigate the above property based on the semi-classical theory in which
electrons and electromagnetic fields are treated quantum-mechanically and classically, respectively.