期刊
APL PHOTONICS
卷 3, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5043486
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资金
- National Key R&D Program of China [2017YFA0303703]
- Natural Science Foundation [2017JZ019]
- Postdoctoral Science Foundation of Shaanxi Province [2017BSHTDZZ18]
- China Postdoctoral Science Foundation [2016M600777]
- ITMO University Visiting Professorship via the Government of Russia [074-U01]
- Severo Ochoa Excellence Program [SEV-2015-0522]
- Fundacio Privada Cellex
- Fundacio Privada Mir-Puig
- CERCA (Generalitat de Catalunya)
- RFBR
- DFG [18-502-12080]
We address the inhibition of tunneling in polariton condensates confined in a potential landscape created by a honeycomb array of microcavity pillars in the presence of spin-orbit coupling and Zeeman splitting in the external magnetic field. The coupling rate between the microcavity pillars can be strongly impacted even by weak out-of-phase temporal modulations of the depths of the corresponding potential wells. When such a modulation is implemented in truncated honeycomb arrays that realize a polariton topological insulator, which supports unidirectional edge states in the presence of spin-orbit coupling and Zeeman splitting, it allows controlling the velocity of the states. The origin of the phenomenon is the dynamical modulation with a proper frequency, which notably changes the dispersion of the system and the group velocity of edge states. We show that such a control is possible for modulation frequencies close to resonances for the inhibition of tunneling in a two-well configuration. Edge states considerably slow down, and even stop completely, when the modulation frequency approaches a resonant value, while above such a frequency, splitting of the edge states into wavepackets moving with different velocities occurs. (C) 2018 Author(s).
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