Metal-enhanced upconversion luminescence of NaYF4:Yb/Er with Ag nanoparticles

Abstract

Single rare earth doped NaYF 4 nanoplate with different size of Ag nanoparticles is designed for the investigation of metal enhanced upconversion luminescence effect. Up to twice enhancement is obtained with big Ag nanoparticles. Luminescence quenching effect is also observed with small Ag nanoparticles. Exploration on the enhancement factors are carried out systematically based on the effect of local field enhancement, the coupling of LSPR with emission band, and even the enhanced far field distribution. It is suggested that the excitation enhancement is the reason for the enhancement at both wavelength. Emission enhancement also took a significant part in the result which is that in the system, the enhancement effect at 540 nm is greater than that at 650 nm.

Upconversion Luminescence of Silica–Calcia Nanoparticles Co-doped with Tm3+ and Yb3+ Ions

“…Rare-earth-activated systems have been demonstrated to be the pillar of photonic technologies enabling a broad spectrum of crucial applications in strategic social and economic priorities [1][2][3][4][5]. Systems based on rare-earth-doped upconverters are largely employed in bioimaging, drug delivery, laser, lighting, photon management, environmental sensing, and nanothermometry [6][7][8][9][10][11][12][13][14][15]. Upconversion (UC) mechanism is a process of energy transfer from a sensitizer in a proper host matrix, which is excited under lowenergy radiation (usually near infrared, NIR), to an emitter that emits higher energy photons than the excitation ones.…”

A quantitative single-nanowire study on the plasmonic enhancement for the upconversion photoluminescence of rare-earth-doped nanoparticles

“…22,29 Meanwhile, localized surface plasmon resonance (LSPR) effects can significantly enhance the local electromagnetic (EM) field surrounding the metal, which can thereby couple with the EM field of emitters located in evanescently confined LSPR fields. [30][31][32][33] Upon rational modulation, the UCPL efficiency can be enhanced effectively through two plausible mechanisms, including the local electric field amplification, and/or the enhanced radiative decay rate. 28,34 The critical parameters for the LSPR enhancement of UCPL include the spectrum match and the distances between the LSPR surfaces and the UCPL cores, which have been widely studied and proved by physically coupling UCNPs with zero, one, and two-dimensional (0D, 1D, and 2D) LSPR materials with controlled spatial distances.…”

“…22,29 Meanwhile, localized surface plasmon resonance (LSPR) effects can significantly enhance the local electromagnetic (EM) field surrounding the metal, which can thereby couple with the EM field of emitters located in evanescently confined LSPR fields. 30–33 Upon rational modulation, the UCPL efficiency can be enhanced effectively through two plausible mechanisms, including the local electric field amplification, and/or the enhanced radiative decay rate. 28,34…”

BaWO4:Ln3+ Nanocrystals: Controllable Synthesis, Theoretical Investigation on the Substitution Site, and Bright Upconversion Luminescence as a Sensor for Glucose Detection

“…Recently, a great deal of effort has been made for controllable synthesis of lanthanide-doped nanocrystals owing to their potential applications. − The luminescence of lanthanide-doped nanoparticles (NPs) is divided into downconversion (DC) and upconversion (UC) processes. Especially, the UC nanocrystals are rapidly emerging as new bioprobes and conventional molecular probes because of their superior features. − Up to now, many lanthanide-doped nanomaterials have been reported for diagnostic and analytical pathology. − …”