Lattice topology and spontaneous parametric down-conversion in quadratic nonlinear waveguide arrays

Daniel Leykam, Alexander S. Solntsev, Andrey A. Sukhorukov, Anton S. Desyatnikov

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We analyze spontaneous parametric down-conversion in various experimentally feasible one-dimensional quadratic nonlinear waveguide arrays, with emphasis on the relationship between the lattice's topological invariants and the biphoton correlations. Nontrivial topology results in a nontrivial "winding" of the array's Bloch waves, which introduces additional selection rules for the generation of biphotons, independent of existing control using the pump beam's spatial profile and phase-matching conditions. In finite lattices, nontrivial topology produces single-photon edge modes, resulting in "hybrid" biphoton edge modes, with one photon localized at the edge and the other propagating into the bulk. When the single-photon band gap is sufficiently large, these hybrid biphoton modes reside in a band gap of the bulk biphoton Bloch wave spectrum. Numerical simulations support our analytical results.

Original languageEnglish
Article number033815
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume92
Issue number3
DOIs
Publication statusPublished - Sep 10 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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