期刊
OPTICS LETTERS
卷 39, 期 23, 页码 6600-6603出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.39.006600
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- Ministry of Science and Technology (MOST) of Taiwan [103-2221-E-006-055, 103-3113-M-110-001]
Shortcuts to adiabaticity, originally developed in the context of quantum control, are powerful tools for the design of high coupling efficiency, robust, and short coupled-waveguide devices. The counterdiabatic protocol cancels the unwanted coupling in system evolution by the addition of a counterdiabatic term. The invariant-based inverse-engineering approach designs system evolution using the decoupled eigenstates of the Lewis-Riesenfeld invariant. The single-shot shaped-pulse technique directly parameterizes the solution of the coupled-mode equation. Starting from the counterdiabatic protocol, we show that these seemingly very different shortcuts to adiabaticity techniques are equivalent in the framework of coupled-waveguide systems. When combined with perturbation treatment of the coupled-mode equation, robust coupled-waveguide devices against errors can be obtained. (C) 2014 Optical Society of America
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