Optical Materials: X最新文献_第2页

A review of the optically and thermally stimulated luminescence properties of aluminosilicates 铝硅酸盐的光学和热激发发光特性综述

Optical Materials: X Pub Date : 2024-09-12 DOI: 10.1016/j.omx.2024.100351

引用次数: 0

Electrophysical and thermoelectric properties and crystal structure of the formed Mn4Si7 thin vacuum coatings 已形成的 Mn4Si7 真空薄涂层的电物理特性、热电性能和晶体结构

Optical Materials: X Pub Date : 2024-09-11 DOI: 10.1016/j.omx.2024.100353

引用次数: 0

Energy transfer processes leading to strong NIR-to-red upconversion in the Yb-concentrated Sr3Yb0.98Er0.02(PO4)3 eulytite 导致镱富集的 Sr3Yb0.98Er0.02(PO4)3 eulytite 中发生强烈的近红外-红外上转换的能量转移过程

Optical Materials: X Pub Date : 2024-09-11 DOI: 10.1016/j.omx.2024.100358

{"title":"Energy transfer processes leading to strong NIR-to-red upconversion in the Yb-concentrated Sr3Yb0.98Er0.02(PO4)3 eulytite","authors":"","doi":"10.1016/j.omx.2024.100358","DOIUrl":"10.1016/j.omx.2024.100358","url":null,"abstract":"<div>The optical spectroscopy and the decay kinetics of samples with composition Sr3Yb(PO4)3, Sr3Y0.98Yb0.02(PO4)3, Sr3Y0.98Er0.02(PO4)3 and Sr3Yb0.98Er0.02(PO4)3 have been studied at room temperature. The presence of efficient energy transfer and migration processes has been clearly evidenced in the Sr3Yb(PO4)3 and Sr3Yb0.98Er0.02(PO4)3 materials, giving rise to strong visible upconversion upon excitation in the spectral region around 1 μm in the latter material. The strong anti-Stokes emission is connected to fast migration in the 2F5/2 level of Yb3+, due to the inefficient concentration quenching for this ion. In this class of materials, the upconversion processes could be optimized even in the presence of high concentrations of the Yb3+ sensitizer.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000706/pdfft?md5=0ac6e7c411764cff7996f7b7f673be53&pid=1-s2.0-S2590147824000706-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy transfer processes in LuAG:Ce and LuAG:Ce, Pr single crystalline film scintillators LuAG:Ce 和 LuAG:Ce、Pr 单晶膜闪烁体中的能量传递过程

Optical Materials: X Pub Date : 2024-09-11 DOI: 10.1016/j.omx.2024.100350

{"title":"Energy transfer processes in LuAG:Ce and LuAG:Ce, Pr single crystalline film scintillators","authors":"","doi":"10.1016/j.omx.2024.100350","DOIUrl":"10.1016/j.omx.2024.100350","url":null,"abstract":"<div>This work is devoted to examining the influence of energy transfer processes between Ce3+ and Pr3+ ions on the luminescent and scintillation properties of LuAG:Ce and LuAG:Ce,Pr scintillators, grown by liquid phase epitaxy onto undoped LuAG substrates with a PbO–B2O3-based flux. To characterize them, measurements of the absorption, cathodoluminescence, photoluminescence emission and excitation spectra as well as the photoluminescence decay kinetics of the SCFs under study were performed. The investigation confirmed simultaneous energy transfer processes between d-f and f-f states of Pr3+ ions and between Pr3+ (d-f) and Ce3+ (d-f) ions, as well as from Ce3+ (d-f) to Pr3+ (f-f) ions in LuAG host. Furthermore, the energy transfer from Pb2+ flux-related impurity to Ce3+ (d-f) and Pr3+ (f-f) ions also were found in the LuAG:Ce and LuAG:Ce,Pr SCFs. An energy diagram of the Pb2+, Pr3+ and Ce3+ ion levels was constructed, which provides a deeper overview of the mentioned energy transfer processes.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000627/pdfft?md5=e9d2f3365d3f3e4f99d47380622fa639&pid=1-s2.0-S2590147824000627-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142229229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical and experimental study of plasmon oscillation dispersion in Si and Ge crystals 硅晶体和 Ge 晶体等离子振荡频散的理论和实验研究

Optical Materials: X Pub Date : 2024-09-11 DOI: 10.1016/j.omx.2024.100354

引用次数: 0

Spectroscopy and crystal-field analysis of low-symmetry Er3+ centres in K2YF5 microparticles K2YF5 微颗粒中低对称性 Er3+ 中心的光谱和晶场分析

Optical Materials: X Pub Date : 2024-09-10 DOI: 10.1016/j.omx.2024.100356

{"title":"Spectroscopy and crystal-field analysis of low-symmetry Er3+ centres in K2YF5 microparticles","authors":"","doi":"10.1016/j.omx.2024.100356","DOIUrl":"10.1016/j.omx.2024.100356","url":null,"abstract":"<div>K<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math>YF<math><msub><mrow></mrow><mrow><mn>5</mn></mrow></msub></math> crystals doped with lanthanide ions have a variety of possible optical applications. Owing to the low symmetry of the system, the crystal structure cannot be unambiguously determined by x-ray diffraction. However, electron-paramagnetic resonance studies have demonstrated that lanthanide ions substitute for yttrium in sites of C<math><msub><mrow></mrow><mrow><mi>s</mi></mrow></msub></math> local symmetry. In this work, we use high-resolution absorption and laser spectroscopy to determine electronic energy levels for Er<math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math> ions in K<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math>YF<math><msub><mrow></mrow><mrow><mn>5</mn></mrow></msub></math> microparticles. A total of 39 crystal-field energy levels, distributed among 7 multiplets of the Er<math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math> ion, have been assigned. This optical data is used for crystal-field modelling of the electronic structure of Er<math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math> in K<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math>YF<math><msub><mrow></mrow><mrow><mn>5</mn></mrow></msub></math>. Our model is fitted not only to the electronic energy levels, but also to the ground-state g-tensor. This magnetic-splitting data defines the axis system of the calculation, avoiding ambiguities associated with low-symmetry crystal-field fits.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000688/pdfft?md5=5124f83c447ecad6800df9530100a981&pid=1-s2.0-S2590147824000688-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoluminescence and scintillation properties of rare earth doped Lu2O3 single crystal grown by floating zone method 浮区法生长的掺稀土 Lu2O3 单晶的光致发光和闪烁特性

Optical Materials: X Pub Date : 2024-09-10 DOI: 10.1016/j.omx.2024.100357

引用次数: 0

Impurity-enhanced core valence luminescence via Zn-doping in cesium magnesium chlorides 通过在铯镁氯化物中掺杂锌实现杂质增强型核价发光

Optical Materials: X Pub Date : 2024-08-31 DOI: 10.1016/j.omx.2024.100349

{"title":"Impurity-enhanced core valence luminescence via Zn-doping in cesium magnesium chlorides","authors":"","doi":"10.1016/j.omx.2024.100349","DOIUrl":"10.1016/j.omx.2024.100349","url":null,"abstract":"<div>Scintillators with faster timing capabilities are currently in high demand for use in radiation detection systems in the fields of nuclear and medical physics. The limited number of suitable materials that meet the performance criteria of next generation detection systems presents an opportunity for discovery of new fast scintillator materials. In this work, the effects of doping several ultrafast core-valence luminescent (CVL) scintillators with divalent Zn is explored. Three compounds are investigated – CsMgCl3, Cs2MgCl4, and Cs3MgCl5 – and single crystals of each doped with 5 mol% Zn are grown via the Bridgman method. Additionally, mixing across the full range of concentrations (from 0 % to 100 % Zn) is explored in the Cs2Mg1-xZnxCl4 and Cs3Mg1-xZnxCl5 systems. For low concentrations of Zn, light yields of all three compounds are enhanced (by up to ∼60 %) compared to the pure crystals, achieving what we believe to be the brightest known CVL, CsMgCl3:Zn 5 % (3400 ± 170 ph/MeV light yield). More importantly, Zn doping does not affect the ultrafast timing properties, with each composition maintaining a single-component decay time around 1–3 ns. A sub-100 ps coincidence time resolution (CTR) is also achieved with CsMgCl3:Zn 5 %. The results of this work reveal a new avenue towards obtaining brighter CVL materials, which could open up possibilities for more advanced ultrafast scintillators to be discovered moving forward.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000615/pdfft?md5=37508c1b6f9b347cedabc0a9e4f2b669&pid=1-s2.0-S2590147824000615-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142157527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical properties of nitride-rich SiNx and its use in CMOS-compatible near-UV Bragg filter fabrication 富氮化物氮化硅的光学特性及其在 CMOS 兼容型近紫外布拉格滤波器制造中的应用

Optical Materials: X Pub Date : 2024-08-24 DOI: 10.1016/j.omx.2024.100348

{"title":"Optical properties of nitride-rich SiNx and its use in CMOS-compatible near-UV Bragg filter fabrication","authors":"","doi":"10.1016/j.omx.2024.100348","DOIUrl":"10.1016/j.omx.2024.100348","url":null,"abstract":"<div>Nitride-rich silicon-nitride (SiN<math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math>) is being explored for its potential as a suitable optical material for use in microsystems operating in the near-UV spectral range. Although silicon-rich SiN<math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math> is widely accepted as a CMOS-compatible dielectric and micromechanical material, its optical absorption limits application to the visible to near-IR spectral range. However, this work shows that a balance can be achieved between a sufficiently high index of refraction (<math><mrow><mi>n</mi><mo>></mo></mrow></math> 2) and an acceptable optical loss (<math><mrow><mi>k</mi><mo><</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math>) in nitride-rich SiN<math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math> of appropriate composition (<math><mrow><mi>x</mi><mo>∼</mo><mn>1</mn><mo>.</mo><mn>45</mn></mrow></math>). Bragg reflectors with a design wavelength at <math><msub><mrow><mi>λ</mi></mrow><mrow><mi>o</mi></mrow></msub></math>= 330 nm are used for validation. PECVD is used for sample preparation and experiments confirm that the spectral range available for use of SiN<math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math>-based optical microsystems extends to wavelengths as low as 300 nm.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000603/pdfft?md5=f0d523109d06f0fd5d517373bc4f7ca5&pid=1-s2.0-S2590147824000603-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142157741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailoring optical properties and humidity sensing response of multilayered Tb(Sal)3Phen and Eu(DBM)3Phen complex nanofibres 定制多层 Tb(Sal)3Phen 和 Eu(DBM)3Phen 复合物纳米纤维的光学特性和湿度传感响应

Optical Materials: X Pub Date : 2024-07-01 DOI: 10.1016/j.omx.2024.100340

{"title":"Tailoring optical properties and humidity sensing response of multilayered Tb(Sal)3Phen and Eu(DBM)3Phen complex nanofibres","authors":"","doi":"10.1016/j.omx.2024.100340","DOIUrl":"10.1016/j.omx.2024.100340","url":null,"abstract":"<div>In this work, we investigate the opto-humidity sensing and colour tuning in polyvinyl alcohol (PVA) polymeric electrospun nanofibres dispersed with Tb(Sal)3Phen (TSP) and Eu(DBM)3Phen (EDP) complexes. Fourier transform infrared spectroscopy, scanning electron microscopy, and photoluminescence analysis were used to thoroughly analyse the structural, morphological, and spectroscopic features of the synthesised nanofibres in single and stacked multilayer nanofibres. A spectroscopic analysis was performed on all configuration schemes. Under UV excitations, the synthesised TSP complex and EDP complex inhibited nanofibres yield green and red emission corresponding to 5D4→7Fj (j = 4, 5, 6) and 5D0→7Fj (j = 0, 1, 2, 3) transitions attributed to Tb3+ and Eu3+ ions, respectively. The EDP nanofibres presented better UV radiation absorption than TSP, which was attributed to higher absorptivity of DBM than Sal. Additionally, the photoluminescence intensity ratio of characteristic emission peaks i.e. 544 nm (5D4→7F5)/615 nm (5D0→7F2) is function of humidity exposure and excitation wavelength. The stacked multilayer nanofibres exhibit good response and recovery times, 35 and 52 s, negligible hysteresis, and cyclic stability.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000524/pdfft?md5=0bc856afaacc55cdb1420283af2fb669&pid=1-s2.0-S2590147824000524-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141630219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0