Biphoton topology in a quadratic nonlinear waveguide array under the Su-Schrieffer-Heeger model

Yang, Ying; Zuo, Zheng-Wei; Cao, Dawei

doi:10.1103/physreva.104.043710

Cited by 6 publications

(2 citation statements)

References 56 publications

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“…The NLSE in eq is generally used to describe the topological physics in photonic waveguide arrays. , Bistability is realized experimentally in waveguide arrays, whereas the Bogoliubov fluctuations in eq can be arranged using the parametric down-conversion. − Alternatively, the system of exciton–polaritons, where cavity photons exhibit Kerr nonlinearity by coupling strongly with the quantum well excitons, is also a promising platform for realizing our scheme. They are well known for studying topological photonics. − Bistability is well established for exciton–polaritons. − Bogoliubov fluctuations naturally arise in polariton systems. , By choosing the proper physical units, our present parameters can be related to the exciton–polariton lattices.…”

Section: Proposal For Experimental Realizationmentioning

confidence: 99%

Topology with Memory in Nonlinear Driven-Dissipative Photonic Lattices

2023

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We consider a photonic lattice of nonlinear lossy resonators subjected to a coherent drive, where the system remembers its topological phase. Initially, the system is topologically trivial. After the application of an additional coherent pulse, the intensity is increased, which modifies the couplings in the system and then induces a topological phase transition. However, when the effect of the pulse dies out, the system does not go back to the trivial phase. Instead, it remembers the topological phase and maintains its topology acquired during the pulse application. The pulse can be used as a switch to trigger amplification of the topological modes. We further show that the amplification takes place at a different frequency as well as at a different position from those of the pulse, indicating frequency conversion and intensity transfer. Our work can be useful in triggering the different functionalities of active topological photonic devices.

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Section: Proposal For Experimental Realizationmentioning

confidence: 99%

Topology with Memory in Nonlinear Driven-Dissipative Photonic Lattices

2023

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“…The Bogoliubov fluctuations in Eq. ( 6) can be arranged using the parametric down-conversion [39][40][41][42]. Alter-natively, the system of exciton-polaritons, where cavity photons exhibit Kerr-nonlinearity by coupling strongly with the quantum well excitons, is also a promising platform for realizing our scheme.…”

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confidence: 99%

Topology with memory in nonlinear driven-dissipative photonic lattices

Mandal¹,

Liu²,

Zhang³

2022

Preprint

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We theoretically propose a topological memory in a photonic lattice of nonlinear lossy resonators subjected to a coherent drive, where the system remembers its topological phase. Initially, the system is topologically trivial. After the application of an additional coherent pulse, the intensity is increased, which modifies the couplings in the system and then induce a topological phase transition. However, when the effect of the pulse dies out, the system does not go back to the trivial phase. Instead, it remembers the topological phase and maintains its topology acquired during the pulse application. We further show how the pulse can be used as a switch to trigger amplification of the topological modes. Our work can be useful in triggering the different functionalities of the active topological photonic devices as well as in storing information with topological protection.

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