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Optik

Accelerating adiabatic light transfer and split in three-waveguide couplers via dressed state

Fu-Quan Dou, Zhi-Ming Yan, Xuan-Qing Liu, Wen-Yuan Wang, Chuan‐Cun Shu

Published Mar 7, 2020• 4 citations
Publisher
DOI
10.1016/j.ijleo.2020.164516

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We propose an adiabatic method for transfer of light in a three-waveguide directional coupler in a single mode. In our scheme the propagation coefficients of the two outer waveguides are identical, but may vary simultaneously along the propagation direction. In contrast to earlier work [E. Paspalakis, Opt. Commun. 258, 30 (2006)], where the coupling coefficients are designed to act in the counterintuitive order for an input in one of the outer waveguides, here we may have initially any light input in each of the waveguides and any order of coupling coefficients. Consequently, all three adiabatic eigenstates of the system are used in the dynamics. These solutions allow us to design some interesting waveguide devices.