Optical Materials最新文献

英文中文

A comparison of the effects of different light intensities on the current-voltage characteristics of the Si3N4 interface with various thicknesses grown on the (Au: Ti)/n-GaAs (MS) structure 比较了不同光强对(Au: Ti)/n-GaAs （MS）结构上生长的不同厚度Si3N4界面电流-电压特性的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-15 DOI: 10.1016/j.optmat.2025.117800

Mahmut Bucurgat , Ahmet Faruk Özdemir , Şemsettin Altındal

Different thicknesses of Si₃N₄ insulator layers were grown on an (Au: Ti)/n-GaAs (MS) reference structure to analyze the effect of these layers with/without illumination on the electrical characteristics and compare the results between these structures. With this motivation, current measurements were made as a function of voltage over ±3 V, either in the dark or at 20–100 mW cm⁻² illumination with an increment of 20 mW cm⁻². Some important electric and optoelectronic parameters, such as barrier height at zero bias, ideality factor, saturation current at reverse bias, photosensitivity, photoresponsivity, and detectivity, have been determined using current-voltage data in relation to illumination intensity. To compare the calculation methods used, the basic electrical parameters, the barrier height at zero bias, the ideality factor, and the series resistance were calculated first using the Thermionic Emission Method and then, alternatively, using Cheung functions. Additionally, the dependence of energy of the interface states was investigated using forward bias current voltage data with the ideality factor and barrier height with/without different intensities of illumination, because of their reordering/restructuring in electric field effects and illumination. The voltage-dependent characteristics of resistance of these structures were also determined from Ohm's Law for each illumination intensity.

在(Au: Ti)/n-GaAs （MS）参考结构上生长了不同厚度的Si3N4绝缘层，分析了在光照和不光照条件下这些绝缘层对电特性的影响，并比较了这些结构之间的结果。在此动机下，电流测量作为电压大于±3v的函数进行，无论是在黑暗中还是在20 - 100 mW cm - 2照明下，增量为20 mW cm - 2。一些重要的电学和光电子参数，如零偏置时的势垒高度、理想系数、反向偏置时的饱和电流、光敏性、光响应性和探测性，已经利用与照明强度相关的电流-电压数据确定。为了比较所使用的计算方法，首先使用热离子发射法计算基本电参数、零偏置势垒高度、理想因数和串联电阻，然后使用张函数计算。此外，利用正向偏置电流电压数据与理想因子和势垒高度在不同光照强度下对界面态能量的依赖关系，研究了它们在电场效应和光照下的重排序/重构。根据欧姆定律确定了这些结构的电阻随电压变化的特性。

{"title":"A comparison of the effects of different light intensities on the current-voltage characteristics of the Si3N4 interface with various thicknesses grown on the (Au: Ti)/n-GaAs (MS) structure","authors":"Mahmut Bucurgat , Ahmet Faruk Özdemir , Şemsettin Altındal","doi":"10.1016/j.optmat.2025.117800","DOIUrl":"10.1016/j.optmat.2025.117800","url":null,"abstract":"<div><div>Different thicknesses of Si3N4 insulator layers were grown on an (Au: Ti)/n-GaAs (MS) reference structure to analyze the effect of these layers with/without illumination on the electrical characteristics and compare the results between these structures. With this motivation, current measurements were made as a function of voltage over ±3 V, either in the dark or at 20–100 mW cm−2 illumination with an increment of 20 mW cm−2. Some important electric and optoelectronic parameters, such as barrier height at zero bias, ideality factor, saturation current at reverse bias, photosensitivity, photoresponsivity, and detectivity, have been determined using current-voltage data in relation to illumination intensity. To compare the calculation methods used, the basic electrical parameters, the barrier height at zero bias, the ideality factor, and the series resistance were calculated first using the Thermionic Emission Method and then, alternatively, using Cheung functions. Additionally, the dependence of energy of the interface states was investigated using forward bias current voltage data with the ideality factor and barrier height with/without different intensities of illumination, because of their reordering/restructuring in electric field effects and illumination. The voltage-dependent characteristics of resistance of these structures were also determined from Ohm's Law for each illumination intensity.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"171 ","pages":"Article 117800"},"PeriodicalIF":4.2,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

F center spectra in additively colored BaF2 and SrF2 加色BaF2和SrF2的F中心光谱

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-15 DOI: 10.1016/j.optmat.2025.117795

E.A. Radzhabov

In additively colored crystals at low temperatures, luminescence bands at 1700 nm (BaF₂) and at 1240 nm (SrF₂) were detected. The excitation spectra show a distinct bands at 610 and 444 nm for BaF₂ and SrF₂ respectively. Maxima of both bands coincide with the known maxima of the F centers absorption bands in BaF₂ and SrF₂. Decay of luminescence bands are 3.6 and 1.05 ms for BaF₂ and SrF₂ at 80K.The relative Stokes shift for the 1700 nm band in BaF₂ is close to the Stokes shift for F centers in CaF₂, SrF₂. It was concluded that the 1700 nm band belongs to the F centers in BaF₂.

在低温下，加色晶体在1700 nm （BaF2）和1240 nm （SrF2）处检测到发光带。BaF2和SrF2分别在610和444 nm处有明显的激发光谱。这两个波段的最大值与已知的BaF2和SrF2中F中心吸收波段的最大值一致。在80K下，BaF2和SrF2的发光带衰减分别为3.6和1.05 ms。BaF2中1700 nm波段的相对Stokes位移与CaF2、SrF2中F中心的Stokes位移接近。结果表明，1700nm波段属于BaF2的F中心。

引用次数: 0

Optical properties of β-BBO crystals grown in the BaB2O4-NaBaBO3-BaMoO4 system 在BaB2O4-NaBaBO3-BaMoO4体系中生长的β-BBO晶体的光学性质

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-15 DOI: 10.1016/j.optmat.2025.117805

Dmitry M. Ezhov , Ekaterina A. Simonova , Nadezhda G. Kononova , Artem B. Kuznetsov , Elona V. Khan , Anastasia A. Goreyavcheva , Valery A. Svetlichnyi , Alexander E. Kokh

A bulk β-BaB₂O₄ crystal was grown from a novel BaB₂O₄-NaBaBO₃-BaMoO₄ ternary solvent system with an optimal solvent composition using top-seeded solution growth (TSSG) and its optical properties were compared to those of a reference crystal grown from the conventional binary BaB₂O₄-NaBaBO₃ system. The linear absorption spectrum was measured for both polarizations over an exceptionally broad range from ultraviolet (UV) to terahertz (THz) range (0.2–1500 μm), revealing high transparency and low absorption coefficients, indicative of excellent material uniformity and purity. Nonlinear optical (NLO) performance was evaluated via second-harmonic generation (SHG) at 266 nm, showing comparable efficiency to the reference sample. These results demonstrate that the ternary system enables scalable crystal growth with preserved high optical quality, making it a promising candidate for industrial production of nonlinear optical elements.

采用顶种子溶液生长（TSSG）方法，在最佳溶剂组成的新型BaB2O4-NaBaBO3- bamoo4三元溶剂体系中生长出大块β-BaB2O4晶体，并将其光学性能与传统二元BaB2O4-NaBaBO3体系生长的参考晶体进行了比较。在紫外（UV）到太赫兹（THz）范围（0.2-1500 μm）的极宽范围内测量了两种偏振的线性吸收光谱，显示出高透明度和低吸收系数，表明材料均匀性和纯度优异。通过266nm的二次谐波产生（SHG）来评估非线性光学（NLO）性能，显示出与参考样品相当的效率。这些结果表明，三元体系能够在保持高光学质量的情况下实现可扩展的晶体生长，使其成为非线性光学元件工业生产的有希望的候选者。

{"title":"Optical properties of β-BBO crystals grown in the BaB2O4-NaBaBO3-BaMoO4 system","authors":"Dmitry M. Ezhov , Ekaterina A. Simonova , Nadezhda G. Kononova , Artem B. Kuznetsov , Elona V. Khan , Anastasia A. Goreyavcheva , Valery A. Svetlichnyi , Alexander E. Kokh","doi":"10.1016/j.optmat.2025.117805","DOIUrl":"10.1016/j.optmat.2025.117805","url":null,"abstract":"<div><div>A bulk β-BaB2O4 crystal was grown from a novel BaB2O4-NaBaBO3-BaMoO4 ternary solvent system with an optimal solvent composition using top-seeded solution growth (TSSG) and its optical properties were compared to those of a reference crystal grown from the conventional binary BaB2O4-NaBaBO3 system. The linear absorption spectrum was measured for both polarizations over an exceptionally broad range from ultraviolet (UV) to terahertz (THz) range (0.2–1500 μm), revealing high transparency and low absorption coefficients, indicative of excellent material uniformity and purity. Nonlinear optical (NLO) performance was evaluated via second-harmonic generation (SHG) at 266 nm, showing comparable efficiency to the reference sample. These results demonstrate that the ternary system enables scalable crystal growth with preserved high optical quality, making it a promising candidate for industrial production of nonlinear optical elements.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"172 ","pages":"Article 117805"},"PeriodicalIF":4.2,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detection of shallow traps in LiNbO3:Y:Fe by means of photo-induced light scattering 光致光散射法探测LiNbO3:Y:Fe中的浅阱

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-15 DOI: 10.1016/j.optmat.2025.117801

Mikhail Goulkov , Valeriy Voitsekhovych , Theo Woike

Intensity and temperature study of photo-induced wide-angle polarization-anisotropic light scattering reveals the significant role of shallow traps in photorefractive gratings recorded in LiNbO₃:Y:Fe. It is proposed that the energy levels of Y²⁺(4 d¹) lying near the conduction band, contribute to the buildup of an electric space-charge field as shallow acceptor centers for electrons along with iron deep centers. The split of the yttrium crystal field niveau into six sub-levels is deduced from the temperature dependent break-down of the recorded gratings.

光致广角偏振-各向异性光散射的强度和温度研究揭示了在LiNbO3:Y:Fe中记录的光折变光栅中浅阱的重要作用。我们提出，Y2+(4d1)的能级位于导带附近，作为电子的浅层受体中心和铁的深层中心，有助于电空间电荷场的形成。根据记录光栅的温度相关击穿，推导出钇晶体场niveau分裂为六个子能级。

引用次数: 0

Tm:GdVO4 laser at 2.3 μm based on GSA and ESA dual-wavelength pumping 基于GSA和ESA双波长抽运的2.3 μm Tm:GdVO4激光器

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-15 DOI: 10.1016/j.optmat.2025.117803

Qingsong Sun, Zhongben Pan, Xiaoxu Yu, Zeshang Ji, Hongwei Chu, Han Pan, Dechun Li

In this work, we explore the scheme of dual-wavelength pumping of Tm:GdVO₄ laser with ground state absorption (GSA) (³H₆→³H₄) and excited state absorption (ESA) (³F₄→³H₄). With the pump power of 12.8 W at 798 nm and 6.84 W at 1050 nm, compared to the sum of the output power obtained with single wavelength pumping, an increase of 0.461 W is achieved with dual wavelength pumping, a 89.3 % increase in output power. The results show that the dual-wavelength pumping scheme of GSA and ESA for the 2.3 μm Tm³⁺ doped laser effectively reduces the number of particles in the ³F₄ energy level, and the introduction of the ESA pumping process can accurately excite the Tm³⁺ accumulated in the ³F₄ energy level to the ³H₄ energy level, which effectively increases the output power of the 2.3 μm Tm³⁺ doped laser.

本文研究了基态吸收（GSA）（3H6→3H4）和激发态吸收（ESA）（3F4→3H4）双波长抽运Tm:GdVO4激光器的方案。在798 nm处的泵浦功率为12.8 W，在1050 nm处的泵浦功率为6.84 W，与单波长泵浦的输出功率之和相比，双波长泵浦的输出功率增加了0.461 W，提高了89.3%。结果表明：GSA和ESA双波长抽运方案对2.3 μm Tm3+掺杂激光器有效地减少了3F4能级的粒子数量，引入ESA抽运过程可以准确地将积聚在3F4能级的Tm3+激发到3H4能级，有效地提高了2.3 μm Tm3+掺杂激光器的输出功率。

引用次数: 0

Effect of graphene doping on the electrical and optical properties of ZnO:PDMS composite films 石墨烯掺杂对ZnO:PDMS复合薄膜电学和光学性能的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-15 DOI: 10.1016/j.optmat.2025.117802

Seval Kinden

Polymer-based nanocomposites incorporating functional nanofillers offer great promise for applications in flexible electronics and optoelectronic devices. This study presents the fabrication and characterization of polydimethylsiloxane (PDMS) composite films embedded with pure and graphene (Gr) doped zinc oxide (ZnO) nanostructures to enhance their structural, optical, and electrical performance. ZnO, a wide band gap semiconductor with exciton binding energy, was doped with graphene nanoplatelets at concentrations of 5 wt%, 10 wt%, and 15 wt%. The composite films were formed using the drop-casting technique and systematically investigated to assess the influence of graphene content on the functional properties of the Gr:ZnO: PDMS composite films. FESEM analysis showed that Gr improved ZnO nanopartical dispersion, reducing agglomeration and polarization, especially at 15 wt%, where images appeared significantly brighter. XRD results indicated a transition from a crystalline to an amorphous structure as Gr content increased, with diffraction peaks at 2θ = 22°,33°, 40° gradually disappearing. Optical studies revealed that transmittance increased with Gr content up to 10 wt % (∼82 %) but dropped at 15 wt % (∼65 %). Reflectance analysis indicated enhanced light scattering due to surface roughness and interfacial effects introduced by Gr. The optical band gap decreased from 3.26 eV (undoped) to 3.12 eV at 10 wt%, then slightly increased to 3.18 eV at 15 wt% % due to increased disorder. Piezoelectric response declined at higher Gr concentrations (15 wt%) for all conditions, attributed to conductive network formation and ZnO amorphization. The findings aim to elucidate the synergetic interactions between ZnO and Gr within the PDMS matrix, offering new insights into the development of high-performance, flexible composite films, with 10 wt% Gr offering the best balance of optical and structural performance towards advanced sensor technologies, energy harvesting, and optoelectronic applications.

含有功能性纳米填料的聚合物基纳米复合材料在柔性电子和光电子器件中具有广阔的应用前景。本研究介绍了聚二甲基硅氧烷（PDMS）复合薄膜的制备和表征，以嵌入纯和石墨烯（Gr）掺杂氧化锌（ZnO）纳米结构，以提高其结构，光学和电学性能。ZnO是一种具有激子结合能的宽带隙半导体，在ZnO中掺杂了浓度为5 wt%、10 wt%和15 wt%的石墨烯纳米片。采用滴铸法制备了Gr:ZnO: PDMS复合膜，并系统地研究了石墨烯含量对复合膜功能性能的影响。FESEM分析表明，Gr改善了ZnO纳米颗粒的分散性，减少了团聚和极化，特别是在15% wt%时，图像明显更亮。XRD结果表明，随着Gr含量的增加，晶型结构向非晶型结构转变，2θ = 22°、33°、40°处的衍射峰逐渐消失。光学研究表明，透过率随着Gr含量的增加而增加，最高可达10 wt %(~ 82%)，但在15 wt %（~ 65%）时下降。反射率分析表明，由于表面粗糙度和Gr引入的界面效应，光散射增强。光学带隙在10 wt%时从3.26 eV（未掺杂）减小到3.12 eV，然后在15 wt% %时由于无序增加而略微增加到3.18 eV。在所有条件下，由于导电网络的形成和ZnO的非晶化，在较高的Gr浓度下（15 wt%），压电响应下降。研究结果旨在阐明PDMS基体中ZnO和Gr之间的协同相互作用，为高性能、柔性复合薄膜的开发提供新的见解，其中10 wt% Gr为先进的传感器技术、能量收集和光电子应用提供了光学和结构性能的最佳平衡。

{"title":"Effect of graphene doping on the electrical and optical properties of ZnO:PDMS composite films","authors":"Seval Kinden","doi":"10.1016/j.optmat.2025.117802","DOIUrl":"10.1016/j.optmat.2025.117802","url":null,"abstract":"<div><div>Polymer-based nanocomposites incorporating functional nanofillers offer great promise for applications in flexible electronics and optoelectronic devices. This study presents the fabrication and characterization of polydimethylsiloxane (PDMS) composite films embedded with pure and graphene (Gr) doped zinc oxide (ZnO) nanostructures to enhance their structural, optical, and electrical performance. ZnO, a wide band gap semiconductor with exciton binding energy, was doped with graphene nanoplatelets at concentrations of 5 wt%, 10 wt%, and 15 wt%. The composite films were formed using the drop-casting technique and systematically investigated to assess the influence of graphene content on the functional properties of the Gr:ZnO: PDMS composite films. FESEM analysis showed that Gr improved ZnO nanopartical dispersion, reducing agglomeration and polarization, especially at 15 wt%, where images appeared significantly brighter. XRD results indicated a transition from a crystalline to an amorphous structure as Gr content increased, with diffraction peaks at 2θ = 22°,33°, 40° gradually disappearing. Optical studies revealed that transmittance increased with Gr content up to 10 wt % (∼82 %) but dropped at 15 wt % (∼65 %). Reflectance analysis indicated enhanced light scattering due to surface roughness and interfacial effects introduced by Gr. The optical band gap decreased from 3.26 eV (undoped) to 3.12 eV at 10 wt%, then slightly increased to 3.18 eV at 15 wt% % due to increased disorder. Piezoelectric response declined at higher Gr concentrations (15 wt%) for all conditions, attributed to conductive network formation and ZnO amorphization. The findings aim to elucidate the synergetic interactions between ZnO and Gr within the PDMS matrix, offering new insights into the development of high-performance, flexible composite films, with 10 wt% Gr offering the best balance of optical and structural performance towards advanced sensor technologies, energy harvesting, and optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"171 ","pages":"Article 117802"},"PeriodicalIF":4.2,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retraction notice to “Impact of B2O3/Co3O4 substitution on structure, physical, optical characteristics and photon attenuation capacity of borosilicate glasses” [Opt. Mater. 157C Part 1 (2024) 116151] “B2O3/Co3O4取代对硼硅酸盐玻璃结构、物理、光学特性和光子衰减能力的影响”的撤回通知[Opt. Mater. 157C Part 1 (2024) 116151]

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-14 DOI: 10.1016/j.optmat.2025.117639

Hanan Al-Ghamdi , Nada Alfryyan , Norah A.M. Alsaif , A.S. Abouhaswa , K.S. Higazy , Islam M. Nabil , Y.S. Rammah

引用次数: 0

Are activators in micron-sized particles insensitive to their environment? Electronic spectra of LaPO4:Eu3+ particles in liquids, glasses and phosphor in glasses 微米级颗粒中的活化剂对环境不敏感吗？液体、玻璃和玻璃荧光粉中LaPO4:Eu3+粒子的电子光谱

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-13 DOI: 10.1016/j.optmat.2025.117778

Daiwen Xiao, Ka-Leung Wong, Peter A. Tanner

The behavior of nanoparticles in media of different refractive index has received considerable theoretical and experimental investigation. However, the behavior of larger particles, of micron size, has not been established. We have chosen Eu³⁺ as a marker of environmental changes. Dilution of this ion into LaPO₄ gives a simple, fingerprint emission spectrum which has been studied via its luminescent lifetime, the R2 ((⁵D₀ → ⁷F₂)/(⁵D₀ → ⁷F₁) intensity ratio) and the electric dipole:magnetic dipole intensity ratio, (ED:MD), of spectral features. Measurements of micron-sized particles of LaPO₄:Eu³⁺ synthesized by several methods have been made for dispersions in alcohols, in compressed glass discs, in melted glass discs, in phosphor in glass (PiG) and in melted PiG. The experimental results are discussed and rationalized. The Eu³⁺ ⁵D₀ emission lifetime is reasonably constant in the bulk powders, powders dispersed in alcohols or compressed discs but is smaller in PiGs and melted glass discs. In the PiGs the structural integrity of LaPO₄:Eu³⁺ is maintained until they are melted at higher temperature. The change in lifetime, when varying the composition of the PiG, follows the Virtual Cavity Model. For dispersal of the particles in solvents there is a cut-off particle size below 1 μm where the electronic spectra of the moiety become insensitive to the environment and the properties are determined by refractive index. The remarkable change in R2 ratio in the different systems considered – by a factor of nearly 600 % - and the corresponding decrease in ⁵D₀ lifetime – by a factor of nearly 60 % - illustrates the versatility of the lanthanide ion.

纳米粒子在不同折射率介质中的行为已经得到了大量的理论和实验研究。然而，微米大小的大颗粒的行为尚未确定。我们选择欧盟作为环境变化的标志。将该离子稀释到LaPO4中，得到了简单的指纹发射光谱，并通过其发光寿命R2 ((5D0→7F2)/（5D0→7F1）强度比和光谱特征的电偶极子：磁偶极子强度比（ED:MD）进行了研究。用几种方法合成的微米级的LaPO4:Eu3+颗粒在醇、压缩玻璃盘、熔融玻璃盘、玻璃中荧光粉（PiG）和熔融PiG中的分散体进行了测量。对实验结果进行了讨论和合理化。Eu3+ 5D0的发射寿命在散装粉末、分散在醇或压缩圆盘中的粉末中是相当恒定的，但在猪和熔化的玻璃圆盘中较小。在猪中，LaPO4:Eu3+的结构完整性保持，直到它们在更高的温度下熔化。当改变PiG的组成时，寿命的变化遵循虚拟腔模型。对于粒子在溶剂中的分散，在1 μm以下有一个截止粒径，其中部分的电子谱对环境不敏感，性质由折射率决定。在考虑的不同体系中，R2比的显著变化（接近600%）和相应的5D0寿命的减少（接近60%）说明了镧系离子的多功能性。

{"title":"Are activators in micron-sized particles insensitive to their environment? Electronic spectra of LaPO4:Eu3+ particles in liquids, glasses and phosphor in glasses","authors":"Daiwen Xiao, Ka-Leung Wong, Peter A. Tanner","doi":"10.1016/j.optmat.2025.117778","DOIUrl":"10.1016/j.optmat.2025.117778","url":null,"abstract":"<div><div>The behavior of nanoparticles in media of different refractive index has received considerable theoretical and experimental investigation. However, the behavior of larger particles, of micron size, has not been established. We have chosen Eu3+ as a marker of environmental changes. Dilution of this ion into LaPO4 gives a simple, fingerprint emission spectrum which has been studied via its luminescent lifetime, the R2 ((5D0 → 7F2)/(5D0 → 7F1) intensity ratio) and the electric dipole:magnetic dipole intensity ratio, (ED:MD), of spectral features. Measurements of micron-sized particles of LaPO4:Eu3+ synthesized by several methods have been made for dispersions in alcohols, in compressed glass discs, in melted glass discs, in phosphor in glass (PiG) and in melted PiG. The experimental results are discussed and rationalized. The Eu3+ 5D0 emission lifetime is reasonably constant in the bulk powders, powders dispersed in alcohols or compressed discs but is smaller in PiGs and melted glass discs. In the PiGs the structural integrity of LaPO4:Eu3+ is maintained until they are melted at higher temperature. The change in lifetime, when varying the composition of the PiG, follows the Virtual Cavity Model. For dispersal of the particles in solvents there is a cut-off particle size below 1 μm where the electronic spectra of the moiety become insensitive to the environment and the properties are determined by refractive index. The remarkable change in R2 ratio in the different systems considered – by a factor of nearly 600 % - and the corresponding decrease in 5D0 lifetime – by a factor of nearly 60 % - illustrates the versatility of the lanthanide ion.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"171 ","pages":"Article 117778"},"PeriodicalIF":4.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nd3+ -doped oxyfluoride silicate glasses and glass-ceramics with emphasis on sodium yttrium fluoride crystal structure, thermal, and near-infrared luminescence properties Nd3+掺杂氟化氧硅酸盐玻璃和微晶玻璃，重点研究氟化钇钠的晶体结构、热性能和近红外发光性能

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-11 DOI: 10.1016/j.optmat.2025.117792

Rajesh Dagupati , Ramachari Doddoji , M. Chandra Sekhar

This work reports on Nd³⁺ -doped (SiO₂–Al₂O₃–Na₂O–Y₂O₃–NaF-NdF₃) oxyfluoride silicate glasses (G) and glass-ceramics (GCs) containing sodium yttrium fluoride (β-Na_1.5Y_1.5F₆) nanocrystals. The crystalline structure (β-Na_1.5Y_1.5F₆) and its size (15–20 nm) were studied through HR-TEM (high-resolution transmission electron microscopy). The glass transition temperature (T_g) and coefficient of thermal expansion (CTE) values of the investigated samples were obtained from the dilatometry curves. Physical parameters such as density and molar volumes showed variations with increasing Nd³⁺ content in G and GCs samples. The optical absorption of GCs increased significantly with the increase in Nd³⁺ concentration. Further analysis of optical band gap energies was carried out through Tauc's plots for the 0.5Nd sample. Judd-Ofelt (J-O) theory was employed to calculate Ω_2,4,6, quality factor (χ), and radiative parameters for the 0.5Nd G and GC samples. The NIR (near-infrared) emission peaks showed higher emission intensity in GCs than in the G samples, with the highest emission observed at 1.06 μm. With the Nd³⁺ ion content, the lifetime of the ⁴F_3/2 state was decreased both in G (from 379 to 358 μs) and GCs (from 344 to 343 μs) samples. The superior laser properties, such as emission cross-section (2.57 × 10⁻²⁰ cm²), gain bandwidth (86.25 × 10⁻²⁷ cm³), and quantum efficiency (82 %) were obtained for the 0.5Nd_GC sample and are highly beneficial for laser applications at 1.06 μm emission.

本文报道了掺Nd3+ (sio2 - al2o3 - na20 - y2o3 - naf - ndf3)氟化氧硅酸盐玻璃(G)和含氟化钇钠（β-Na1.5Y1.5F6）纳米晶体的玻璃陶瓷（GCs）。通过高分辨率透射电镜（hrtem）研究了晶体结构（β-Na1.5Y1.5F6）及其尺寸（15 ~ 20 nm）。通过膨胀曲线得到了样品的玻璃化转变温度（Tg）和热膨胀系数（CTE）。随着Nd3+含量的增加，G和gc样品的物理参数（如密度和摩尔体积）发生了变化。随着Nd3+浓度的增加，gc的光吸收显著增加。通过Tauc图对0.5Nd样品进行了光学带隙能的进一步分析。采用Judd-Ofelt （J-O）理论计算0.5Nd G和GC样品的Ω2、4、6、质量因子（χ）和辐射参数。gc样品的近红外发射峰强度高于G样品，在1.06 μm处达到最高值。随着Nd3+离子含量的增加，G和gc样品的4F3/2态寿命分别从379 μs和344 μs降低到343 μs。0.5Nd_GC样品的发射截面（2.57 × 10−20 cm2）、增益带宽（86.25 × 10−27 cm3）和量子效率（82%）等优异的激光性能有利于1.06 μm发射激光的应用。

{"title":"Nd3+ -doped oxyfluoride silicate glasses and glass-ceramics with emphasis on sodium yttrium fluoride crystal structure, thermal, and near-infrared luminescence properties","authors":"Rajesh Dagupati , Ramachari Doddoji , M. Chandra Sekhar","doi":"10.1016/j.optmat.2025.117792","DOIUrl":"10.1016/j.optmat.2025.117792","url":null,"abstract":"<div><div>This work reports on Nd3+ -doped (SiO2–Al2O3–Na2O–Y2O3–NaF-NdF3) oxyfluoride silicate glasses (G) and glass-ceramics (GCs) containing sodium yttrium fluoride (β-Na1.5Y1.5F6) nanocrystals. The crystalline structure (β-Na1.5Y1.5F6) and its size (15–20 nm) were studied through HR-TEM (high-resolution transmission electron microscopy). The glass transition temperature (Tg) and coefficient of thermal expansion (CTE) values of the investigated samples were obtained from the dilatometry curves. Physical parameters such as density and molar volumes showed variations with increasing Nd3+ content in G and GCs samples. The optical absorption of GCs increased significantly with the increase in Nd3+ concentration. Further analysis of optical band gap energies was carried out through Tauc's plots for the 0.5Nd sample. Judd-Ofelt (J-O) theory was employed to calculate Ω2,4,6, quality factor (χ), and radiative parameters for the 0.5Nd G and GC samples. The NIR (near-infrared) emission peaks showed higher emission intensity in GCs than in the G samples, with the highest emission observed at 1.06 μm. With the Nd3+ ion content, the lifetime of the 4F3/2 state was decreased both in G (from 379 to 358 μs) and GCs (from 344 to 343 μs) samples. The superior laser properties, such as emission cross-section (2.57 × 10−20 cm2), gain bandwidth (86.25 × 10−27 cm3), and quantum efficiency (82 %) were obtained for the 0.5Nd_GC sample and are highly beneficial for laser applications at 1.06 μm emission.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"171 ","pages":"Article 117792"},"PeriodicalIF":4.2,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145735266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Structural, electronic, thermoelectric, and optical investigations on Cr substituted Ta2O5” [Opt. Mater. 148 (2024) 114901] “Cr取代Ta2O5的结构、电子、热电和光学研究”的勘误表[光学材料，148 (2024)114901]

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2025-12-11 DOI: 10.1016/j.optmat.2025.117453

Laiba Ashraf , Salma Waseem , Muhammad Tauseef Qureshi , Ghazala Yunus , Lubna Aamir , Farman Ullah , Murtaza Saleem

引用次数: 0

首页上一页

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Optical Materials

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀