Open AccessSpontaneous emission from a two-level atom in a dynamic photonic crystal with an isotropic disoersion relation
Author(s) -
Xing Rong,
Xie Shuang-Yuan,
Jing-Ping Xu,
Yuchen Yang
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.094205
Subject(s) - photonic crystal , physics , isotropy , oscillation (cell signaling) , population , spontaneous emission , atom (system on chip) , enhanced data rates for gsm evolution , photonics , atomic physics , optics , telecommunications , laser , computer science , embedded system , genetics , demography , sociology , biology
The spontaneous emission of a two-level atom, located in an isotropic photonic crystal with dynamically modulated photonic band edge, has been studied. When the photonic band edge is modulated with step functions or triangle functions, the evolution of atomic population on the upper level has been discussed. When the photonic band edge is modulated with step functions, the dynamics of atomic population depends not only on the detuning value of the atomic transition frequency from the band edge, but also on the time point of stepping. With the different time point of stepping, the dynamics of atomic population after stepping is different. When the photonic band edge is modulated with triangle functions, the atomic population oscillates quasi-periodically while decaying in general. The oscillation frequency, peak and valley values, and the decaying rate of oscillation can be modulated by choosing the frequency and initial phase of triangle functions.