All-optical switching at the two-photon limit with interference-localized states

Ville A.J. Pyykkönen, Grazia Salerno, Jaakko Kähärä, Päivi Törmä*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

5 Lataukset (Pure)

Abstrakti

We propose a single-photon-by-single-photon all-optical switch concept based on interference-localized states on lattices and their delocalization by interaction. In its "open"operation, the switch stops single photons while allows photon pairs to pass the switch. Alternatively, in the "closed"operation, the switch geometrically separates single-photon and two-photon states. We demonstrate the concept using a three-site Stub unit cell and the diamond chain. The systems are modeled by Bose-Hubbard Hamiltonians, and the dynamics is solved by exact diagonalization with Lindblad master equation. We discuss realization of the switch using photonic lattices with nonlinearities, superconductive qubit arrays, and ultracold atoms. We show that the switch allows arbitrary "ON"/"OFF"contrast while achieving picosecond switching time at the single-photon switching energy with contemporary photonic materials.

AlkuperäiskieliEnglanti
Artikkeli043259
JulkaisuPHYSICAL REVIEW RESEARCH
Vuosikerta5
Numero4
DOI - pysyväislinkit
TilaJulkaistu - lokak. 2023
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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