Bloch Oscillations and Zener Tunneling of Exciton Polariton Condensates in One- and Two-dimensional Lattices

• Applicants: Professor Dr. Sebastian Klembt; Professor Dr. Ulf Peschel
• Subject Area: Theoretical Condensed Matter Physics ; Experimental Condensed Matter Physics ; Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: from 2018 to 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 399153120

• Final Report Year: 2022

Final Report Abstract

In the course of the project, basic components for a future exciton-polariton based photonic signal processing as waveguides, couplers and lattices have been designed, realized and optimized. Fundamental quantum mechanical effects as coherent coupling, Bloch oscillations and the excitation of topologically protected states have been demonstrated for exciton-polariton condensates, but also in equivalent fiber-based systems sharing the same physics. The fabrication technologies as well as the spectroscopic and numerical tools and the theoretical understanding developed within the project have been very successful in demonstrating fundamental propagating phenomena with excitonpolaritons and photons. Furthermore, the project results pave the way for the experimental realization of other fundamental effects such as higher-dimensional Bloch oscillations, nonlinear switching, soliton formation and strong interactions in exciton-polariton systems. Thus, an important step towards a future photonic application of exciton-polariton condensates for all-optical switching and signal processing has been made.

Publications

• "Stability of topologically protected edge states in nonlinear fiber loops," Phys. Rev. A 100, 063830 (2019)
  A. Bisianov, M. Wimmer, U. Peschel, and O.A. Egorov
  
• "Impact of the Energy Landscape on Polariton Condensates’ Propagation along a Coupler," Advanced Optical Materials 8, 2000650 (2020)
  E. Rozas, J. Beierlein, A. Yulin, M. Klaas, H. Suchomel, O. Egorov, I.A. Shelykh, U. Peschel, C. Schneider, S. Klembt, S. Höfling, M.D. Martin, and L. Vina
  
• "Topological Floquet interface states in optical fiber loops," Physical Review A 102, 053511 (2020)
  A. Bisianov, A. Muniz, U. Peschel, and O.A. Egorov
  
• “Exciton-polaritons in flatland: Controlling flatband properties in a Lieb lattice,” Phys. Rev. B 102, 121302(R) (2020)
  T. H. Harder, O. A. Egorov, J. Beierlein, P. Gagel, J. Michl, M. Emmerling, C. Schneider, U. Peschel, S. Höfling, and S. Klembt
  
• "Bloch Oscillations of Hybrid Light-Matter Particles in a Waveguide Array," Advanced Optical Materials 9, 2100126 (2021)
  J. Beierlein, O.A. Egorov, T.H. Harder, P. Gagel, M. Emmerling, C. Schneider, S. Höfling, U. Peschel, and S. Klembt
  
• "Effects of the Linear Polarization of Polariton Condensates in their Propagation in Codirectional Couplers," ACS Photonics 8, 2489 (2021)
  E. Rozas, A. Yulin, J. Beierlein, S. Klembt, S. Höfling, O. Egorov, U. Peschel, I.A. Shelykh, M. Gudin, I. Robles-Lopez, M.D. Martin, M.D. Martin, and L. Vina
  
• "Kagome Flatbands for Coherent Exciton-Polariton Lasing," ACS Photonics 8, 3139 (2021)
  T.H. Harder, O.A. Egorov, C. Krause, J. Beierlein, P. Gagel, M. Emmerling, C. Schneider, U. Peschel, S. Höfling, and S. Klembt
  
• "Propagative Oscillations in Codirectional Polariton Waveguide Couplers," Phys. Rev. Lett. 126, 075302 (2021)
  J. Beierlein, E. Rozas, O.A. Egorov, M. Klaas, A. Yulin, H. Suchomel, T.H. Harder, M. Emmerling, M.D. Martin, I.A. Shelykh, C. Schneider, U. Peschel, L. Vina, S. Höfling, and S. Klembt