Topologically Protected Valley-Dependent Quantum Photonic Circuits
نویسندگان
چکیده
Topological photonics has been introduced as a powerful platform for integrated optics, since it can deal with robust light transport, and be further extended to the quantum world. Strikingly, valley-contrasting physics in topological photonic structures contributes valley-related edge states, their unidirectional coupling, even valley-dependent wave division junctions. Here, we design fabricate nanophotonic harpoon-shaped beam splitters (HSBSs) based on 120-deg-bending interfaces demonstrate first on-chip information process. Two-photon interference, namely, Hong-Ou-Mandel interference high visibility of 0.956±0.006, is realized our 50/50 HSBS, which constructed by two topologically distinct domain walls. Cascading this kind HSBS together, also simple circuit generation path-entangled state. Our work shows that valley state used processing, possible realize more complex circuits insulators, provides novel method processing.Received 11 December 2020Accepted May 2021DOI:https://doi.org/10.1103/PhysRevLett.126.230503© 2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasOptical processingPhotonic crystalsQuantum effectsTopological effects systemsTopological insulatorsValleytronicsQuantum InformationCondensed Matter, Materials & Applied Physics
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2021
ISSN: ['1079-7114', '0031-9007', '1092-0145']
DOI: https://doi.org/10.1103/physrevlett.126.230503