摘要
Pseudomagnetic fields(PMFs)can manipulate photons in a similar way that magnetic fields control electrons.However,the PMF-based control over light has been restricted to simple waveguiding of the Landau level states,which hinders the application of PMFs in practical photonic integrated circuits.Here,we propose a universal and systematic methodology to design complex nonuniform PMFs and arbitrarily control the flow of light in silicon photonic crystals at telecommunication wavelengths.As proofs of concept,an S-bend(with a low insertion loss of<1.83 dB)and a 50:50 power splitter(with a low excess loss of<2.11 dB and imbalance of less than±0.5 dB)based on PMFs are experimentally demonstrated.A high-speed data transmission experiment is performed on these devices with 140-Gb∕s four-level pulse amplitude modulation signals to prove their applicability in real communication systems.The proposed method offers a paradigm for exploring magnetic-field-related physics with neutral particles and developing nanophotonic devices with PMF-induced states beyond the Landau level states and the topological edge states.
基金
supported in part by the National Key Research and Development Program of China[Grant No.2023YFB2905503(L.S.)]
the National Natural Science Foundation of China[Grant Nos.62035016(J.D.),62475146(L.S.),62105200(L.S.),and 62341508(Y.S.)].
