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Laser Refrigeration of Ytterbium‐Doped Sodium–Yttrium–Fluoride Nanowires
Author(s) -
Zhou Xuezhe,
Smith Bennett E.,
Roder Paden B.,
Pauzauskie Peter J.
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201600406
Subject(s) - materials science , yttrium , laser , photoluminescence , nanowire , photon upconversion , optoelectronics , doping , ytterbium , fluoride , inorganic chemistry , optics , metallurgy , oxide , physics , chemistry
Sodium yttrium fluoride (β‐NaYF 4 ) nanowires (NWs) with a hexagonal crystal structure are synthesized using a low‐cost hydrothermal process and are shown to undergo laser refrigeration based on an upconversion process leading to anti‐Stokes (blueshifted) photoluminescence. Single‐beam laser trapping combined with forward light scattering is used to investigate cryophotonic laser refrigeration of individual NWs through analysis of their local Brownian dynamics.