Klein tunneling in driven-dissipative photonic graphene

Year: 2017

Authors: Ozawa T., Amo A., Bloch J., Carusotto I.

Autors Affiliation: Univ Trento, CNR BEC Ctr, INO, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Univ Paris Saclay, Univ Paris Sud, CNRS, Ctr Nanosci & Nanotechnol,C2N Marcoussis, F-91460 Marcoussis, France.

Abstract: We theoretically investigate Klein tunneling processes in photonic artificial graphene. Klein tunneling is a phenomenon in which a particle with Dirac dispersion going through a potential step shows a characteristic angle- and energy-dependent transmission. We consider a generic photonic system consisting of a honeycomb-shaped array of sites with losses, illuminated by coherent monochromatic light. We show how the transmission and reflection coefficients can be obtained from the steady-state field profile of the driven-dissipative system. Despite the presence of photonic losses, we recover the main scattering features predicted by the general theory of Klein tunneling. Signatures of negative refraction and the orientation dependence of the intervalley scattering are also highlighted. Our results will stimulate the experimental study of intricate transport phenomena using driven-dissipative photonic simulators.

Journal/Review: PHYSICAL REVIEW A

Volume: 96 (1)      Pages from: 13813-1  to: 13813-10

More Information: We thank T. Jacqmin and M. Milicevic for stimulating discussions. This work was supported by the ERC Grants QGBE and Honeypol, by the EU-FET Proactive Grant AQuS, Project No. 640800, by the Provincia Autonoma di Trento partially through the Project On silicon chip quantum optics for quantum computing and secure communications-SiQuro, the Labex NanoSaclay Project ICQOQS (Grant No. ANR10-LABX-0035), and the French National Research Agency (ANR) Project Quantum Fluids of Light (Grant No. ANR-16CE30-0021).
KeyWords: Phase-transition; Quantum; Condensation; Reflection; Dynamics; States
DOI: 10.1103/PhysRevA.96.013813

ImpactFactor: 2.909
Citations: 22
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