Femtosecond laser melting upconversion nanoparticles for sub-micrometer optical patterning
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This study introduces a method for precise modulation of upconversion luminescence (UCL) in UCNP thin films via laser-induced melting, enabling high-resolution, sub-micrometer optical patterning. By employing a 460-nm femtosecond (fs) laser, localized melting ... ...
