A single-beam NIR laser-triggered full-color upconversion tuning of a Er/Tm:CsYb<sub>2</sub>F<sub>7</sub>@glass photothermal nanocomposite for optical security
Jiwen Zhu, Shaoxiong Wang, Zezhong Yang, Shengxiang Liao, Jidong Lin, Hurong Yao, Feng Huang, Yuanhui Zheng, Daqin Chen
Abstract
NCs with excellent water resistance and the ability to withstand high-power laser irradiation. Based on these unique characteristics, a proof-of-concept anti-counterfeiting experiment is designed. The results indicate that dynamic full-color UC luminescence patterns can be easily tuned by simply changing the power of the incident 980 nm laser. The present work not only confirms that the designed photothermal material can increase information security, but also provides a new idea for practical applications in the field of anti-counterfeiting.
Topics & Concepts
Materials sciencePhotothermal therapyPhoton upconversionCyanLaserOptoelectronicsNanocompositeNanocrystalLuminescencePhotothermal effectExcitationIrradiationNanotechnologyOpticsEngineeringElectrical engineeringPhysicsNuclear physicsLuminescence Properties of Advanced MaterialsSolid State Laser TechnologiesGlass properties and applications