Spatial coherence from Nd3+ quantum emitters mediated by a plasmonic chain

JAVIER FERNANDEZ-MARTINEZ, SOL CARRETERO-PALACIOS, LAURA SANCHEZ-GARCIA, JORGE BRAVO-ABAD, PABLO MOLINA, NIELS VAN HOOF, MARIOLA O. RAMIREZ, JAIME GOMEZ RIVAS, LUISA E. BAUSA*

*Corresponding author for this work

    Research output: Contribution to journalArticleResearchpeer-review

    3 Citations (Scopus)

    Abstract

    Controlling the coherence properties of rare earth emitters in solid-state platforms in the absence of an optical cavity is highly desirable for quantum light-matter interfaces and photonic networks. Here, we demonstrate the possibility of generating directional and spatially coherent light from Nd3+ ions coupled to the longitudinal plasmonic mode of a chain of interacting Ag nanoparticles. The effect of the plasmonic chain on the Nd3+ emission is analyzed by Fourier microscopy. The results reveal the presence of an interference pattern in which the Nd3+ emission is enhanced at specific directions, as a distinctive signature of spatial coherence. Numerical simulations corroborate the need of near-field coherent coupling of the emitting ions with the plasmonic chain mode. The work provides fundamental insights for controlling the coherence properties of quantum emitters at room temperature and opens new avenues towards rare earth based nanoscale hybrid devices for quantum information or optical communication in nanocircuits.

    Original languageEnglish
    Pages (from-to)26244-26254
    Number of pages11
    JournalOptics express
    Volume29
    Issue number16
    DOIs
    Publication statusPublished - 16 Aug 2021

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