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Pseudo-spin switches and Aharonov-Bohm effect for topological boundary modes.
Kawaguchi, Yuma; Smirnova, Daria; Komissarenko, Filipp; Kiriushechkina, Svetlana; Vakulenko, Anton; Li, Mengyao; Alù, Andrea; Khanikaev, Alexander B.
Afiliación
  • Kawaguchi Y; Department of Electrical Engineering, The City College of New York, New York, NY 10031, USA.
  • Smirnova D; Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia.
  • Komissarenko F; Department of Electrical Engineering, The City College of New York, New York, NY 10031, USA.
  • Kiriushechkina S; Department of Electrical Engineering, The City College of New York, New York, NY 10031, USA.
  • Vakulenko A; Department of Electrical Engineering, The City College of New York, New York, NY 10031, USA.
  • Li M; Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
  • Alù A; Department of Electrical Engineering, The City College of New York, New York, NY 10031, USA.
  • Khanikaev AB; Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY 10031, USA.
Sci Adv ; 10(15): eadn6095, 2024 Apr 12.
Article en En | MEDLINE | ID: mdl-38608013
ABSTRACT
Topological boundary modes in electronic and classical-wave systems exhibit fascinating properties. In photonics, topological nature of boundary modes can make them robust and endows them with an additional internal structure-pseudo-spins. Here, we introduce heterogeneous boundary modes, which are based on mixing two of the most widely used topological photonics platforms-the pseudo-spin-Hall-like and valley-Hall photonic topological insulators. We predict and confirm experimentally that transformation between the two, realized by altering the lattice geometry, enables a continuum of boundary states carrying both pseudo-spin and valley degrees of freedom (DoFs). When applied adiabatically, this leads to conversion between pseudo-spin and valley polarization. We show that such evolution gives rise to a geometrical phase associated with the synthetic gauge fields, which is confirmed via an Aharonov-Bohm type experiment on a silicon chip. Our results unveil a versatile approach to manipulating properties of topological photonic states and envision topological photonics as a powerful platform for devices based on synthetic DoFs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Adv Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Adv Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos