Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Opt Lett. 2011 Mar 15;36(6):957-9. doi: 10.1364/OL.36.000957.
We propose a direct electron acceleration scheme that uses a two-color pulsed radially polarized laser beam. The two-color scheme achieves electron acceleration exceeding 90% of the theoretical energy gain limit, over twice of what is possible with a one-color pulsed beam of equal total energy and pulse duration. The scheme succeeds by exploiting the Gouy phase shift to cause an acceleration-favoring interference of fields only as the electron enters its effectively final accelerating cycle. Optimization conditions and power scaling characteristics are discussed.
我们提出了一种使用双色脉冲径向偏振激光束的直接电子加速方案。该双色方案实现了超过 90%的理论能量增益限制的电子加速，是同等总能量和脉冲持续时间的单色脉冲光束的两倍多。该方案通过利用古斯相位偏移来实现，当电子进入其有效最终加速周期时，仅使场的加速有利干扰。讨论了优化条件和功率扩展特性。
