Klein tunneling in driven-dissipative photonic graphene

Anno: 2017

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

Affiliazione autori: 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.

Giornale/Rivista: PHYSICAL REVIEW A

Volume: 96 (1)      Da Pagina: 013813-1  A: 013813-10

Parole chiavi: PHASE-TRANSITION; QUANTUM; CONDENSATION; REFLECTION; DYNAMICS; STATES
DOI: 10.1103/PhysRevA.96.013813

Citazioni: 15
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2022-06-26
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