Optical Materials: X最新文献_第4页

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

Pratik S. Solanki, Michael F. Reid, Jon-Paul R. Wells

{"title":"Spectroscopy and crystal-field analysis of low-symmetry Er3+ centres in K2YF5 microparticles","authors":"Pratik S. Solanki, Michael F. Reid, Jon-Paul R. Wells","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":"24 ","pages":"Article 100356"},"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

Takayuki Yanagida , Daisuke Nakauchi , Kai Okazaki , Takumi Kato , Kenichi Watanabe , Go Okada , Noriaki Kawaguchi

{"title":"Photoluminescence and scintillation properties of rare earth doped Lu2O3 single crystal grown by floating zone method","authors":"Takayuki Yanagida , Daisuke Nakauchi , Kai Okazaki , Takumi Kato , Kenichi Watanabe , Go Okada , Noriaki Kawaguchi","doi":"10.1016/j.omx.2024.100357","DOIUrl":"10.1016/j.omx.2024.100357","url":null,"abstract":"<div>A series of Lu2O3 single crystals doped with rare earth (RE) ions (RE = Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb, dopant concentrations are 1 %) was synthesized by the floating zone method. Their photoluminescence (PL) and scintillation properties were evaluated. In PL, emissions due to 4f-4f transitions of trivalent rare earth ions were observed, and those doped with Nd3+, Eu3+, Tb3+ and Er3+ showed the highest emission intensities among the samples. As a scintillation property, those doped with Eu, Gd, and Dy showed a clear photoabsorption peak under 137Cs 662 keV γ-ray irradiation. Among them, the Eu3+-doped Lu2O3 showed the highest scintillation light yield of 67000 photons/MeV. The current work conducted the first systematic study of rare earth doped Lu2O3 single crystals grown by the floating zone method.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"24 ","pages":"Article 100357"},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259014782400069X/pdfft?md5=805abb2f52a406b486a8b9d1c23ccf86&pid=1-s2.0-S259014782400069X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173400","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

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

Daniel Rutstrom , Luis Stand , Maciej Kapusta , Dylan Windsor , Haixuan Xu , Charles L. Melcher , Mariya Zhuravleva

{"title":"Impurity-enhanced core valence luminescence via Zn-doping in cesium magnesium chlorides","authors":"Daniel Rutstrom , Luis Stand , Maciej Kapusta , Dylan Windsor , Haixuan Xu , Charles L. Melcher , Mariya Zhuravleva","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":"24 ","pages":"Article 100349"},"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

Reinoud F. Wolffenbuttel , Declan Winship , Yutao Qin , Yogesh Gianchandani , David Bilby , Jaco H. Visser

{"title":"Optical properties of nitride-rich SiNx and its use in CMOS-compatible near-UV Bragg filter fabrication","authors":"Reinoud F. Wolffenbuttel , Declan Winship , Yutao Qin , Yogesh Gianchandani , David Bilby , Jaco H. Visser","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":"24 ","pages":"Article 100348"},"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

Pooja , Ketan Pancholi , Yashashchandra Dwivedi

{"title":"Tailoring optical properties and humidity sensing response of multilayered Tb(Sal)3Phen and Eu(DBM)3Phen complex nanofibres","authors":"Pooja , Ketan Pancholi , Yashashchandra Dwivedi","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":"23 ","pages":"Article 100340"},"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

The dual luminescence of M2MgTeO6 (M= Sr, Ba) double perovskites M2MgTeO6（M= Sr，Ba）双过氧化物的双重发光特性

Optical Materials: X Pub Date : 2024-07-01 DOI: 10.1016/j.omx.2024.100337

E. Cavalli , F. Mezzadri , M.M. Natile

{"title":"The dual luminescence of M2MgTeO6 (M= Sr, Ba) double perovskites","authors":"E. Cavalli , F. Mezzadri , M.M. Natile","doi":"10.1016/j.omx.2024.100337","DOIUrl":"https://doi.org/10.1016/j.omx.2024.100337","url":null,"abstract":"<div>Sr2MgTeO6 (SMT) and Ba2MgTeO6 (BMT) ceramics with the double perovskite structure have been synthesized by solid-state route and by thermal decomposition of nitrate solution precursor. Both compounds possess interesting and unexpected emission properties in the visible and NIR regions, never reported before for this type of materials. These properties have been measured in different experimental conditions in order to characterize their nature. The literature information on tellurium containing luminescent materials is not rich and the data are somewhat contradictory: nevertheless, they agree in assigning the emission properties to Te4+ in octahedral coordination, whereas the Te6+ ion is considered not luminescent. The presence of Te4+ ions has then been verified by XPS measurements. On the basis of the experimental evidences, the visible luminescence has been assigned to a transition between the electronic levels of the Te4+ ion. The origin of the NIR emission appears more difficult to assess: among the explored hypotheses, the most convincing one, at the present level of the information, involves the possible interactions between the Te4+ and Te6+ ions with consequent formation of an optically active charge transfer state, as already observed for other ns2-type ions (Bi3+, Sb3+).</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"23 ","pages":"Article 100337"},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000494/pdfft?md5=1101d43af504905d68adf91d6a193c0e&pid=1-s2.0-S2590147824000494-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141596724","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

New explanation for oxidation-induced Cr4+ formation in garnets 石榴石中氧化诱导 Cr4+ 形成的新解释

Optical Materials: X Pub Date : 2024-07-01 DOI: 10.1016/j.omx.2024.100342

M. Chaika , K. Elzbieciak-Piecka , O. Vovk , L. Marciniak

{"title":"New explanation for oxidation-induced Cr4+ formation in garnets","authors":"M. Chaika , K. Elzbieciak-Piecka , O. Vovk , L. Marciniak","doi":"10.1016/j.omx.2024.100342","DOIUrl":"10.1016/j.omx.2024.100342","url":null,"abstract":"<div>The demand for self-Q-switched lasers caused a growing interest in Cr4+:YAG materials. However, the main problem of Cr4+:YAG is an insufficient concentration of Cr4+ ions. This problem is complicated by the absence of the adequate model describing formation of Cr4+ ions. Analysis of the temperature dependence of Cr3+ luminescence in the Cr-doped YAG ceramics after different thermal treatments allows understanding the mechanism of Cr3+-Cr4+ valence transformation. Two types of Cr3+ centers with different spectroscopic properties were revealed in the Cr,Ca-doped YAG ceramics, namely, single Cr3+ ions, and Cr3+/ <math><mrow><mo>[</mo><mrow><msubsup><mtext>Ca</mtext><mi>C</mi><mo>′</mo></msubsup><mo>…</mo><msubsup><mi>V</mi><mi>O</mi><mo>·</mo></msubsup></mrow><mo>]</mo></mrow></math> couples. Using the obtained spectroscopic data, a model of formation of Cr4+ ions in YAG lattice was proposed.</div>","PeriodicalId":52192,"journal":{"name":"Optical Materials: X","volume":"23 ","pages":"Article 100342"},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590147824000548/pdfft?md5=3c9a7ae63d7fa17074f627e252bf4efd&pid=1-s2.0-S2590147824000548-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141951374","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

Influence of swift heavy ions irradiation on optical and luminescence properties of Y3Al5O12 single crystals 快速重离子辐照对 Y3Al5O12 单晶的光学和发光特性的影响

Optical Materials: X Pub Date : 2024-07-01 DOI: 10.1016/j.omx.2024.100341

V. Pankratova , J. Butikova , A. Kotlov , A.I. Popov , V. Pankratov

引用次数: 0

Luminescence properties of Tb3+-activated K2O–La2O3–Ga2O3 glasses Tb3+ 激活的 K2O-La2O3-Ga2O3 玻璃的发光特性

Optical Materials: X Pub Date : 2024-07-01 DOI: 10.1016/j.omx.2024.100344

Naoki Kawano , Kenji Shinozaki , Daisuke Nakauchi , Takumi Kato , Yuma Takebuchi , Hiroyuki Fukushima , Takayuki Yanagida

引用次数: 0

Preface: Phosphor materials for solid state lighting 前言固态照明用荧光粉材料

Optical Materials: X Pub Date : 2024-07-01 DOI: 10.1016/j.omx.2024.100326

引用次数: 0