Efficient shortcut techniques in evanescently coupled waveguides

27th IUPAP Conference on Computational Physics

物理学;计算机科学

Paul, Koushik^1 ; Sarma, Amarendra K.^1

Department OfPhysics, Indian Institute of Technology Guwahati, Guwahati

Assam, India^1

关键词: Adiabatic passages;    Adiabatic process;    Coupled waveguides;    Coupling coefficient;    Coupling efficiency;    Integral components;    Propagation constant;    Switching devices;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/759/1/012056/pdf
DOI  :  10.1088/1742-6596/759/1/012056

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Shortcut to Adiabatic Passage (SHAPE) technique, in the context of coherent control of atomic systems has gained considerable attention in last few years. It is primarily because of its ability to manipulate population among the quantum states infinitely fast compared to the adiabatic processes. Two methods in this regard have been explored rigorously, namely the transitionless quantum driving and the Lewis-Riesenfeld invariant approach. We have applied these two methods to realize SHAPE in adiabatic waveguide coupler. Waveguide couplers are integral components of photonic circuits, primarily used as switching devices. Our study shows that with appropriate engineering of the coupling coefficient and propagation constants of the coupler it is possible to achieve efficient and complete power switching. We also observed that the coupler length could be reduced significantly without affecting the coupling efficiency of the system.