Ho Cheng-Pu, Tseng Shuo-Yen
Opt Lett. 2015 Nov 1;40(21):4831-4. doi: 10.1364/OL.40.004831.
Conventional strategies to design adiabatic coupled-waveguide devices focus on optimizing the system adiabaticity but can only guarantee 100% efficiency at specific lengths. We establish a simple technique allowing the optimization of device adiabaticity and ensuring 100% coupling/conversion efficiency at any physically realizable length. Specifically, we use the shortcuts-to-adiabaticity technique to represent the system state precisely and engineer the system evolution to be as close to the adiabatic state as possible. Smooth parameters are derived for coupled-waveguide devices, which feature good robustness against wavelength and fabrication variations at the same time. The proposed device is verified with beam propagation simulations.
设计绝热耦合波导器件的传统策略侧重于优化系统绝热性，但只能在特定长度下保证100%的效率。我们建立了一种简单的技术，可优化器件绝热性并确保在任何物理可实现的长度下都具有100%的耦合/转换效率。具体而言，我们使用绝热捷径技术精确表示系统状态，并设计系统演化使其尽可能接近绝热状态。为耦合波导器件推导了平滑参数，这些参数同时具有对波长和制造变化的良好鲁棒性。所提出的器件通过光束传播模拟得到了验证。
