全带隙光子晶体中依赖原子位置的衰减动力学性质

Characteristics of decay kinetics of atoms in photonic crystals with absolute gaps

介绍一个二能级原子在全带隙光子晶体带边附近的衰减动力学行为 .发现原子位置的变化会根本地改变激发原子的衰减特性 :由于光场和原子之间局域耦合强度的巨大差异 ,导致Weisskopf Wigner和非Weisskopf Wigner衰减现象 .

The characteristics of the decay kinetics of a two-level atom near the band edges of photonic crystals with absolute gaps are analyzed. It is found that the decay behavior of an excited atom can be fundamentally changed by the variation of the atomic position: the Weisskopf-Wigner and non-Weisskopf-Wigner decay phenomena occur at different atomic positions as a result of a significant difference in the local coupling strength between the photons and an atom. Our finding implies that it is possible to tailor luminescence spectra by controlling the atomic position.