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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
Decay kinetic properties of atoms in photonic crystals with absolute gaps
Xue-Hua Wang1, Ben-Yuan Gu, Rongzhou Wang
1Solid State Physics and the Nanometer Consortium, Lund University, PO Box 118, S-221 00 Lund, Sweden. xhw124@rsphysse.anu.edu.au
Abstract:
Decay kinetic properties of a two-level atom near the band edges of photonic crystals (PCs) with absolute gaps are studied based on the Green's function expression for the evolution operator. The local coupling strength between the photons and an atom is evaluated by an exact numerical method. It is found that the decay behavior of an excited atom can be fundamentally changed by the variation of the atomic position: Weisskopf-Wigner and non-Weisskopf-Wigner decay phenomena occur at different atomic positions in the PCs as a result of a significant difference in the local coupling strength. Our finding implies that it is possible to engineer the luminescence spectrum by controlling the atomic position.
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