Intense Field Population Transfer

这项工作考察了强响应条件下光和物质相互作用的两个方面：1)超连续谱产生(SCG)，泵浦光子戏剧性地转移到覆盖广泛光谱的模式；2)原子中的绝热通道(AP)，原子布居从一种状态转移到另一种状态，通过“反直觉”序列的脉冲。SCG对于研究强脉冲在介质中的传播具有重要意义，在产生可调谐短激光脉冲、高速通信系统、频率测量和医疗诊断等方面有着重要的应用。AP是一种稳健而有效的布居转移技术，在原子光学和量子测量中得到了广泛的应用。将进行实验，以检查SCG的细节，以便在基本层面上建立理解。AP将通过使用成形的激光脉冲和通过各种中间态来探索。

This work examines two aspects of the interaction of light and matter under conditions of strong response: 1) supercontinuum generation (SCG), the dramatic transfer of pump photons to modes covering a broad spectrum and 2) adiabatic passage (AP) in atoms, the transfer of atomic population from one state to another via pulses in "counter-intuitive" sequence. SCG is fundamentally important to the study of intense pulse propagation through media and has found important application in the generation of tunable short laser pulses, high-speed communication systems, frequency metrology, and medical diagnostics. AP is a robust and efficient technique for population transfer which has found useful application in atom optics and quantum measurement. Experiments will be undertaken to examine the details of SCG in order to establish understanding at a fundamental level. AP will be explored through the use of shaped laser pulses and via various intermediate states.