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4 October 2023 Pseudo-spin switches and geometrical phases in topological photonic systems
Yuma Kawaguchi, Daria Smirnova, Filipp Komissarenko, Svetlana Kiriushechkina, Anton Vakulenko, Andrea Alù, Alexander B. Khanikaev
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Proceedings Volume PC12647, Active Photonic Platforms (APP) 2023; PC126471A (2023) https://doi.org/10.1117/12.2677120
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Here we demonstrate that a unitary transformation due to nonuniform artificial gauge field enables a new class of topological boundary states carrying both spin and valley polarization. We show that such transformations also allow to tune radiative lifetimes of the hybrid spin-valley boundary modes. Then we demonstrate that gauge transformations, when applied adiabatically to the boundary modes, offer a mechanism for flipping the pseudo-spin without back reflection thus implementing an X-gate acting in synthetic Bloch subspaces spanned by pseudo-spins. Finally, we show that such adiabatic evolutions give rise to the geometrical phases, which offers a generic Phase-gate operation. Our results unveil a new versatile approach to control modes in topological photonics and also envisions topological materials as one of promising candidates for integrated quantum photonics applications.
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Yuma Kawaguchi, Daria Smirnova, Filipp Komissarenko, Svetlana Kiriushechkina, Anton Vakulenko, Andrea Alù, and Alexander B. Khanikaev "Pseudo-spin switches and geometrical phases in topological photonic systems", Proc. SPIE PC12647, Active Photonic Platforms (APP) 2023, PC126471A (4 October 2023); https://doi.org/10.1117/12.2677120
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KEYWORDS
Photonics systems
Quantum switching
Polarization
Quantum control
Quantum operations
Quantum photonics
Reflection
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