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Daily Overview |
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TOM Materials S5: Optical Materials: Luminescent materials
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9:00am - 9:15am
Mid-infrared emission properties of Dy3+-doped GeS2–Ga2S3–CdI2 glasses 1Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA-CNRS-ENSICAEN, Université de Caen Normandie, Caen, France; 2Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université de Rennes, Rennes, France; 3Laboratoire de Physico Chimie de l'Atmosphère, Université du Littoral Côte d'Opale, Dunkerque, France We report on a spectroscopic study of photosensitive GeS2–Ga2S3–CdI2 glasses doped with 500–3000 ppm Dy3+ regarding their mid-infrared emission properties, for the development of waveguide lasers. The glasses exhibit low phonon energy (435 cm–1), high infrared transparency and broadband emission around 4.4 µm (the 6H11/2 → 6H13/2 transition) with a long luminescence lifetime in the range of 1.2–1.52 ms. 9:15am - 9:30am
Spectroscopy and laser performance of Yb:CaF2 ceramic prepared via wet-route synthesis 1Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA-CNRS-ENSICAEN, Université de Caen Normandie, 14050 Caen, France; 2Chimie ParisTech, PSL Research University, UMR 8247 CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France; 3Sorbonne Université, Faculté des Sciences et Ingénierie, 75005 Paris, France Transparent 1.5 at.% Yb3+-doped CaF2 ceramic was synthesized by a wet-chemistry route, exhibiting a high transmission of 94.4% at 1.1 µm. Continuous-wave Yb:CaF2 ceramic laser generated 0.86 W at ~1033 nm with a slope efficiency of 64.5%. The laser wavelength was continuously tunable across 1007.3 – 1071.3 nm. 9:30am - 9:45am
Visible emission of Pr3+-doped amorphous fluoride microspheres 1Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA–CNRS–ENSICAEN, Université de Caen Normandie, 14050 Caen, France; 2ENSSAT, UMR 6082–CNRS–Insitut FOTON, Université de Rennes, 22300 Lannion, France Praseodymium (Pr3+) doped amorphous fluoride microspheres (80 µm in diameter) have been produced from bulk Pr3+:LiYF4 crystals by plasma torch method and their morphology, vibronic and spectroscopic properties have been studied. The microspheres enable multi-color visible emission (3PJ manifold lifetime: 45 µs) and are promising for whispering gallery mode microlasing. 9:45am - 10:00am
Tb³⁺-Doped Phosphate Glass-Ceramics with Enhanced Magneto-Optical and Luminescent Properties 1Photonics Laboratory, Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 3, 33720 Tampere, Finland; 2Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, Pessac, F-33600, France; 3Laboratório de Vidros Especiais (LaViE), Institute of Chemistry, São Paulo State University (UNESP), Araraquara SP Brazil In this work, Tb³⁺ doped phosphate glasses with composition (100 − x) (10 Na₂O – 90 NaPO₃) – x Tb₄O₇ (x = 0, 1.5, 2.5, 3.5 mol%) were synthesized by melt quenching method and subsequently heat treated to induce crystallization. Structural evolution was examined using XRD, SEM, and Raman spectroscopy. Optical absorption spectra showed the typical absorption bands of Tb³⁺. Magnetic measurements revealed enhanced paramagnetic behavior with increasing Tb content. Photoluminescence under 377 nm excitation exhibited stronger green emission after heat treatment, confirming reduced non radiative losses and improved local coordination. These results demonstrate the potential of Tb³⁺ doped phosphate glass ceramics as multifunctional materials for optical and magneto optical applications. 10:00am - 10:15am
Mid-infrared emission of Dy3+-doped transparent yttria ceramic 1Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA-CNRS-ENSICAEN, Université de Caen Normandie, 14050 Caen, France; 2Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, 620016 Ekaterinburg, Russia; 3Vitebsk State Technological University, 210035 Vitebsk, Belarus; 4Belarusian State University of Informatics and Radioelectronics, 220027 Minsk, Belarus 1 at.% Dy3+-doped Y2O3 transparent ceramic was fabricated by vacuum sintering at 1750 °C from laser-ablated nanoparticles and its structure and mid-infrared emission were studied. For the 6H13/2 → 6H15/2 Dy3+ transition, the stimulated-emission cross-section is 0.39×10–20 cm2 at 3.3 µm corresponding to an emission bandwidth of 173 nm. 10:15am - 10:30am
Laser photo-acoustic spectroscopy with microscope detects resonant absorption and chirality in nanostructured media 1Sapienza University of Rome, Italy; 2Physics Department, University of Eloued, Algeria; 3Physics Department, University of Crete, Greece Photo-acoustic effect has been unconventionally used to measure absorption in nanostructures. We apply microscope-enriched photo-acoustic spectroscopy with widely tunable laser, which offers full tunability of a conventional chiro-optical set-up. We use it to measure both resonant absorption and intrinsic and extrinsic chirality in various plasmonic nanostructured media. | ||
