Ultraslow optical solitons in a four-level tripod atomic system |
| |
Authors: | Chao Hang |
| |
Institution: | a Department of Physics, East China Normal University, Shanghai 200062, China b State Key Laboratory of Precision Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, China |
| |
Abstract: | We investigate possible formation and propagation of localized, shape-preserving nonlinear optical pulse in a resonant, lifetime-broadened four-level tripod atomic system via electromagnetically induced transparency (EIT). We prove both analytically and numerically that although in anomalous dispersion regimes near resonance a superluminal optical soliton may appear, such soliton suffers serious absorption. However, by choosing appropriate parameters to make the system work in normal dispersion regimes and within an EIT transparency window, ultraslow optical solitons with very low light intensity can form and propagate stably in the system. |
| |
Keywords: | 42 50 Gy 42 65 Tg |
本文献已被 ScienceDirect 等数据库收录! |
|