Near-infrared Two-wavelength-selective Response of Thermosensitive Gels Modified with Rare-earth Ions

AbstractFluoroindate glasses co-doped with Pr3+/Er3+ ions were synthesized and their near-infrared luminescence properties have been examined under selective excitation wavelengths. For the Pr3+/Er3+ co-doped glass samples several radiative and nonradiative relaxation channels and their mechanisms are proposed under direct excitation of Pr3+ and/or Er3+. The energy transfer processes between Pr3+ and Er3+ ions in fluoroindate glasses were identified. In particular, broadband near-infrared luminescence (FWHM = 278 nm) associated to the 1G4 → 3H5 (Pr3+), 1D2 → 1G4 (Pr3+) and 4I13/2 → 4I15/2 (Er3+) transitions of rare earth ions in fluoroindate glass is successfully observed under direct excitation at 483 nm. Near-infrared luminescence spectra and their decays for glass samples co-doped with Pr3+/Er3+ are compared to the experimental results obtained for fluoroindate glasses singly doped with rare earth ions.

Download Full-text

Promoting luminescence of Yb/Er codoped ferroelectric composite by polarization engineering for optoelectronic applications

Nanophotonics ◽

10.1515/nanoph-2019-0230 ◽

2019 ◽

Vol 8 (12) ◽

pp. 2215-2223 ◽

Cited By ~ 2

Author(s):

Er Pan ◽

Gongxun Bai ◽

Yutao Peng ◽

Liang Chen ◽

Shiqing Xu

Keyword(s):

Rare Earth ◽

Electric Field ◽

Electrical Resistance ◽

Near Infrared ◽

Optoelectronic Devices ◽

Glass Ceramics ◽

Luminescent Properties ◽

Rare Earth Ions ◽

Luminescent Materials ◽

Crystal Structural

AbstractFerroelectric oxide nanocrystals, in combination with the robust coupling of an electric field with crystal structure symmetry, makes such systems agreeable to field-induced crystal structural transformation. The luminescent properties of rare earth ions are sensitive to the symmetry of the surrounding crystal field. The luminescence tuning of rare earth ions is an important assignment in the research of luminescent materials. However, the current conditional feasibility and reversibility in the exploration of luminescence modification remain major challenges. In this article, the luminescence modulation of rare earth ions has been developed in Yb3+/Er3+ codoped ferroelectrics glass ceramics containing Bi4Ti3O12 nanocrystals through an electric field. The inclusion of nanocrystals in the glass matrix greatly enhances the electrical resistance. Both upconversion and near-infrared emissions of rare earth ions are effectively enhanced more than twice via polarization engineering. The electric field regulates the photonic properties of rare earth ions with excellent reversibility and nonvolatility in ferroelectrics. The effective modification by electric field provides a new scheme for optical storage and optoelectronic devices.

Download Full-text

Application of red and near infrared emission from rare earth ions for radiation measurements based on optical fibers

1997 IEEE Nuclear Science Symposium Conference Record ◽

10.1109/nssmic.1997.672699 ◽

2002 ◽

Author(s):

E. Takada ◽

Y. Hosono ◽

T. Kakuta ◽

M. Yamazaki ◽

H. Takahashi ◽

...

Keyword(s):

Rare Earth ◽

Optical Fibers ◽

Near Infrared ◽

Infrared Emission ◽

Rare Earth Ions ◽

Near Infrared Emission ◽

Radiation Measurements

Download Full-text

Potential of Nano-Sized Rare Earth Fluorides in Optical Applications

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.106.93 ◽

2005 ◽

Vol 106 ◽

pp. 93-102 ◽

Cited By ~ 5

Author(s):

Ulrich H. Kynast ◽

Marina M. Lezhnina ◽

H. Kätker

Keyword(s):

Rare Earth ◽

Near Infrared ◽

Vacuum Ultraviolet ◽

Wide Band ◽

Rare Earth Ions ◽

Wide Band Gap ◽

Coordination Numbers ◽

Porous Matrices ◽

Optical Applications ◽

Rare Earth Fluorides

Rare earth fluorides are a class of materials with a high potential for optical applications. Fluoride lattices allow high coordination numbers for the hosted rare earth ions, but the high ionicity of the rare earth to fluorine bond leads to a wide band gap and very low vibrational energies. These two essential factors, in particular, contribute to their practicality for use in optical applications based on vacuum ultraviolet (VUV) and near infrared (NIR) excitation. The preparation and optical characteristics of rare earth fluoride nanoparticles and their embedding in polymeric, glassy or porous matrices are very promising for the eventual manufacture of transparent hybrid materials. Recent attempts to control the size of these particles down to the nano-scale and, at the same time, maintaining the performance of their macroscopic counterparts, indicate accessibility of hitherto unrealized optical properties and applications.

Download Full-text

Rare earth ions enhanced near infrared fluorescence of Ag2S quantum dots for the detection of fluoride ions in living cells

Nanoscale ◽

10.1039/c7nr04436d ◽

2017 ◽

Vol 9 (37) ◽

pp. 14031-14038 ◽

Cited By ~ 23

Author(s):

Caiping Ding ◽

Xuanyu Cao ◽

Cuiling Zhang ◽

Tangrong He ◽

Nan Hua ◽

...

Keyword(s):

Quantum Dots ◽

Rare Earth ◽

Near Infrared ◽

Living Cells ◽

Rare Earth Ions ◽

Fluoride Ions ◽

Near Infrared Fluorescence ◽

Ag2s Quantum Dots

We discovered that the fluorescence of Ag2S QDs can be enhanced by rare earth ions through AIE and then developed method for F− detection based on the coordination of rare earth ions with F−.

Download Full-text

Photolumineszenz und sensibilisierte IR-Emission der dreiwertigen Seltenen Erden in Ca3La2Te2O12

Zeitschrift für Naturforschung A ◽

10.1515/zna-1985-0708 ◽

1985 ◽

Vol 40 (7) ◽

pp. 699-705 ◽

Cited By ~ 1

Author(s):

H.-D. Autenrieth ◽

B. Kottmann ◽

S. Kemmler-Sack

Keyword(s):

Rare Earth ◽

Diffuse Reflectance ◽

Near Infrared ◽

Infrared Region ◽

Host Lattice ◽

Rare Earth Ions ◽

New Host ◽

Trivalent Rare Earth ◽

Near Infrared Region ◽

Ir Emission

By activation of the new host lattice Ca3La2Te2O12 with trivalent rare earth ions an emission in the visible (Ln3+=Sm, Eu, Tb, Dy, Ho, Er, Tm) or near infrared region (Nd, Ho, Er, Tm, Yb) is observed. Energy transfer from Nd3+ to Yb3+ , from Er3+, Yb3+ to Ho3+ and from Yb3+ to Tm3+ has been found to occur. The excitation, emission and diffuse reflectance spectra are analyzed.

Download Full-text

RE-Based Inorganic-Crystal Nanofibers Produced by Electrospinning for Photonic Applications

Materials ◽

10.3390/ma14102679 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2679

Author(s):

Alessandra Toncelli

Keyword(s):

Rare Earth ◽

Near Infrared ◽

High Surface ◽

High Surface Area ◽

Volume Ratio ◽

Rare Earth Ions ◽

Polymer Materials ◽

Electrospinning Technique ◽

Rare Earth Doped

Electrospinning is an effective and inexpensive technique to grow polymer materials in nanofiber shape with exceptionally high surface-area-to-volume ratio. Although it has been known for about a century, it has gained much interest in the new millennium thanks to its low cost and versatility, which has permitted to obtain a large variety of multifunctional compositions with a rich collection of new possible applications. Rare-earth doped materials possess many remarkable features that have been exploited, for example, for diode pumped bulk solid-state lasers in the visible and near infrared regions, or for biomedical applications when grown in nanometric form. In the last few decades, electrospinning preparation of rare-earth-doped crystal nanofibers has been developed and many different materials have been successfully grown. Crystal host, crystal quality and nanosized shape can deeply influence the optical properties of embedded rare earth ions; therefore, a large number of papers has recently been devoted to the growth and characterization of rare earth doped nanofibers with the electrospinning technique and an up-to-date review of this rapidly developing topic is missing; This review paper is devoted to the presentation of the main results obtained in this field up to now with particular insight into the optical characterization of the various materials grown with this technique.

Download Full-text

Diffuse-Reflectance Spectra of Rare-Earth Oxides

Applied Spectroscopy ◽

10.1366/000370267774385173 ◽

1967 ◽

Vol 21 (3) ◽

pp. 167-171 ◽

Cited By ~ 34

Author(s):

William B. White

Keyword(s):

Rare Earth ◽

Diffuse Reflectance ◽

Near Infrared ◽

Diffuse Reflectance Spectroscopy ◽

Rare Earth Oxides ◽

Rare Earth Ions ◽

Reflectance Spectra ◽

Solid Materials ◽

Diffuse Reflectance Spectra ◽

Structural Types

Diffuse-reflectance spectra are reported for 11 rare-earth oxides of various structural types over the spectral range of 225–2700 mμ. These spectra, particularly in the near infrared, permit the use of diffuse-reflectance spectroscopy to identify rare-earth ions in solid materials.

Download Full-text