Department of Photonics, National Cheng Kung University, Tainan 701, Taiwan.
Opt Lett. 2012 Dec 15;37(24):5118-20. doi: 10.1364/OL.37.005118.
We propose fast and robust mode conversion in multimode waveguides based on Lewis-Riesenfeld invariant theory. The design of mode converters using the multimode driving for dynamical invariant is discussed. Computer-generated planar holograms are used to mimic the shaped pulses driving the states in three-level quantum systems. We show that the invariant-based inverse engineering scheme reduces mode converter length as compared to the common adiabatic scheme.
我们提出了基于刘易斯-里森菲尔德不变理论的多模波导中的快速和鲁棒模式转换。利用多模驱动动力学不变量设计了模式转换器。计算机生成的平面全息图用于模拟驱动三级量子系统状态的整形脉冲。我们表明，与常见的绝热方案相比，基于不变量的逆向工程方案可以减少模式转换器的长度。
