259447
doi
10.1021/acs.nanolett.6b03949
oai:zenodo.org:259447
user-nanoqtech-h2020
user-eu
de Oliveira Lima, K.
PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
Ferrier, A.
PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
Goldner, Ph.
PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
Optical Line Width Broadening Mechanisms at the 10 kHz Level in Eu3+:Y2O3 Nanoparticles
Bartholomew, J.G.
PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
rare earth
quantum technologies
nanoqtech
nanoparticles
coherence lifetime
<p>We identify the physical mechanisms responsible for the optical homogeneous broadening in Eu<sup>3+</sup>:Y<sub>2</sub>O<sub>3</sub> nanoparticles to determine whether rare-earth crystals can be miniaturized to volumes less than λ<sup>3</sup> whilst preserving their appeal for quantum technology hardware. By studying how the homogeneous line width depends on temperature, applied magnetic field, and measurement time scale the dominant broadening interactions for various temperature ranges above 3 K were characterized. Below 3 K the homogeneous line width is dominated by an interaction not observed in bulk crystal studies. These measurements demonstrate that broadening due to size-dependent phonon interactions is not a significant contributor to the homogeneous line width, which contrasts previous studies in rare-earth ion nanocrystals. Importantly, the results provide strong evidence that for the 400 nm diameter nanoparticles under study the minimum line width achieved (45±1 kHz at 1.3 K) is not fundamentally limited. In addition, we highlight that the expected broadening caused by electric field fluctuations arising from surface charges is comparable to the observed broadening. Under the assumption that such Stark broadening is a significant contribution to the homogeneous line width, several strategies for reducing this line width to below 10 kHz are discussed. Furthermore, it is demonstrated that the Eu<sup>3+</sup> hyperfine state lifetime is sufficiently long to preserve spectral features for timescales up to 1 s. These results allow integrated rare-earth ion quantum optics to be pursued at a sub-micron scale and hence, open up directions for greater scaling of rare-earth quantum technology. </p>
Zenodo
2017-01-18
info:eu-repo/semantics/article
747844
user-nanoqtech-h2020
user-eu
award_title=Nanoscale Systems for Optical Quantum Technologies; award_number=712721; award_identifiers_scheme=url; award_identifiers_identifier=https://cordis.europa.eu/projects/712721; funder_id=00k4n6c32; funder_name=European Commission;
1579541440.668914
644466
md5:f4f239c981ccceb7340ead86cdd844d3
https://zenodo.org/records/259447/files/Optical_line_width_broadening_mechanisms_at_the_10_kHz_level_in_Eu3+_Y2O3_nanoparticles_Supporting_information.pdf
988716
md5:cafa286245e279dadd904c2ce4a220a2
https://zenodo.org/records/259447/files/Optical_line_width_broadening_mechanisms_at_the_10_kHz_level_in_Eu3+_Y2O3_nanoparticles.pdf
public