Topologically tunable polaritons based on two-dimensional crystals in a photonic lattice
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866915671218061312 |
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| author | Lackner, Lukas Egorov, Oleg A. Ernzerhof, Anthony Bennenhei, Christoph Mitryakhin, Victor N. Leibeling, Gilbert Eilenberger, Falk Tongay, Seth Ariel Peschel, Ulf Esmann, Martin Schneider, Christian |
| author_facet | Lackner, Lukas Egorov, Oleg A. Ernzerhof, Anthony Bennenhei, Christoph Mitryakhin, Victor N. Leibeling, Gilbert Eilenberger, Falk Tongay, Seth Ariel Peschel, Ulf Esmann, Martin Schneider, Christian |
| contents | Topological photonics is an emergent research discipline which interlinks fundamental aspects of photonics, information processing and solid-state physics. Exciton-polaritons are a specifically interesting platform to study topological phenomena, since the coherent light matter coupling enables new degrees of freedom such as tunable non-linearities, chiralities and dissipation. Room-temperature operation of such exciton-polaritons relies on materials comprising both, large exciton binding energies and oscillator strength. We harness widely spectrally tunable, room temperature exciton-polaritons based on a WS2 monolayer in an open optical cavity to realize a polariton potential landscape which emulates the Su-Schrieffer-Heeger (SSH) Hamiltonian. It comprises a domain boundary hosting a topological, exponentially localized mode at the interface between two lattices characterized by different Zak-phases which features a spectral tunability over a range as large as 80 meV. Moreover, we utilize the unique tilt-tunability of our implementation, to transform the SSH-lattice into a Stark-ladder. This transformation couples the topologically protected defect mode to propagating lattice modes, and effectively changes the symmetry of the system. Furthermore, it allows us to directly quantify the Zak-phase difference $Δ_{Zak}=(1.13\pm 0.11)π$ between the two topological phases. Our work comprises an important step towards in-situ tuning topological lattices to control and guide light on non-linear chips. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_05214 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Topologically tunable polaritons based on two-dimensional crystals in a photonic lattice Lackner, Lukas Egorov, Oleg A. Ernzerhof, Anthony Bennenhei, Christoph Mitryakhin, Victor N. Leibeling, Gilbert Eilenberger, Falk Tongay, Seth Ariel Peschel, Ulf Esmann, Martin Schneider, Christian Optics Mesoscale and Nanoscale Physics Topological photonics is an emergent research discipline which interlinks fundamental aspects of photonics, information processing and solid-state physics. Exciton-polaritons are a specifically interesting platform to study topological phenomena, since the coherent light matter coupling enables new degrees of freedom such as tunable non-linearities, chiralities and dissipation. Room-temperature operation of such exciton-polaritons relies on materials comprising both, large exciton binding energies and oscillator strength. We harness widely spectrally tunable, room temperature exciton-polaritons based on a WS2 monolayer in an open optical cavity to realize a polariton potential landscape which emulates the Su-Schrieffer-Heeger (SSH) Hamiltonian. It comprises a domain boundary hosting a topological, exponentially localized mode at the interface between two lattices characterized by different Zak-phases which features a spectral tunability over a range as large as 80 meV. Moreover, we utilize the unique tilt-tunability of our implementation, to transform the SSH-lattice into a Stark-ladder. This transformation couples the topologically protected defect mode to propagating lattice modes, and effectively changes the symmetry of the system. Furthermore, it allows us to directly quantify the Zak-phase difference $Δ_{Zak}=(1.13\pm 0.11)π$ between the two topological phases. Our work comprises an important step towards in-situ tuning topological lattices to control and guide light on non-linear chips. |
| title | Topologically tunable polaritons based on two-dimensional crystals in a photonic lattice |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2406.05214 |