標題: | Spontaneous emission dynamics in an omnidirectional waveguide made of photonic crystals |
作者: | Huang, Chih-Hsien Cheng, Szu-Cheng Wu, Jing-Nuo Hsieh, Wen-Feng 光電工程學系 Department of Photonics |
公開日期: | 8-六月-2011 |
摘要: | The spontaneous emission dynamics of atoms embedded in an omnidirectional waveguide (ODWG), a novel optical waveguide, is studied on the basis of the complete reflection of one-dimensional photonic crystals. With the dispersion curve of the single waveguide mode within the photonic band gap and various extents of background dissipation, we characterize the photon-atom interaction in the ODWG. The photon emitter of the system is a two-level atom embedded in the low-index medium of the multilayer-film ODWG or the atom-ODWG system. Fractional calculus, an innovative mathematical method in optical systems, is applied to solve the equation of motion for this atom-ODWG system. Two kinds of states with different group velocities exhibit totally distinctive dynamical behavior. The high frequency waveguide mode with a fast group velocity shows fast exponential decay in propagation while the band-edge mode with a slow group velocity displays non-Markovian dynamics with non-exponential oscillating time evolution. We therefore suggest different functions of this atom-ODWG system for these two kinds of states. The richness of the physical content of the system is also revealed through investigating the dynamical behavior of the band-edge mode. These results aid in further application and fundamental understanding of the atom-ODWG system. |
URI: | http://dx.doi.org/10.1088/0953-8984/23/22/225301 http://hdl.handle.net/11536/22703 |
ISSN: | 0953-8984 |
DOI: | 10.1088/0953-8984/23/22/225301 |
期刊: | JOURNAL OF PHYSICS-CONDENSED MATTER |
Volume: | 23 |
Issue: | 22 |
結束頁: | |
顯示於類別: | 期刊論文 |