https://doi.org/10.1140/epjd/s10053-024-00898-4
Regular Article - Optical Phenomena and Photonics
Controllable nonreciprocity based on a coupling-tunable waveguide
School of Physics and Optoelectronic Technology, South China University of Technology, 510640, Guangzhou, China
b
wujf@scut.edu.cn
c
lichao@scut.edu.cn
Received:
6
March
2024
Accepted:
15
July
2024
Published online:
31
July
2024
Most of the previously proposed methods for nonreciprocal light transmission are based on the unequal couplings of the nanocavity with the input waveguide and the output waveguide, which will inevitably affect the contrast ratio and working bandwidth. Here, we present a simple approach just via the side coupling between one nonlinear resonator and a coupling-tunable waveguide, demonstrating that a high transmission contrast, broad operation bandwidth, and controllable nonreciprocal light transmission can be realized even though the coupling is symmetric. The underlying physics is revealed. This approach may open a way for the study of on-chip optical information processing and quantum computing.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
