Add time:09/29/2019         Source:infona.pl

Sodium yttrium fluoride (β‐NaYF4) 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.

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