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

Javier Fernández-Martínez, Sol Fernández-Martínez, Laura Sánchez-García, Jorge Bravo-Abad, Pablo Molina, Niels van Hoof, Mariola O. Ramírez, Jaime Gómez Rivas, Luisa E. Bausá (Corresponding author)

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3 Citations (Scopus)
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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
Issue number16
Publication statusPublished - 2 Aug 2021

Bibliographical note

Funding Information:
Funding. Agencia Estatal de Investigación (CEX2018-000805-M, MAT2016-76106-R, PID2019-108257GB-I00, RTI2018-098452-B-I00); Comunidad de Madrid (SI1/PJI/2019-00105); Nederlandse Organisatie voor Wetenschappelijk Onderzoek (Vici Project No. 680-47-628).

Publisher Copyright:
© 2021 Optical Society of America.


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