Journal of Luminescence最新文献_第8页

A highly selective carbazole-based D-π-D-A fluorescence turn-off sensor for Fe3+ detection in aqueous media 一种高选择性咔唑基D-π-D-A荧光关闭传感器，用于水介质中Fe3+的检测

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-28 DOI: 10.1016/j.jlumin.2025.121503

Ahmet Battal , Nuray Altinolcek Gultekin , Mustafa Tavasli , Yavuz Onganer

{"title":"A highly selective carbazole-based D-π-D-A fluorescence turn-off sensor for Fe3+ detection in aqueous media","authors":"Ahmet Battal , Nuray Altinolcek Gultekin , Mustafa Tavasli , Yavuz Onganer","doi":"10.1016/j.jlumin.2025.121503","DOIUrl":"10.1016/j.jlumin.2025.121503","url":null,"abstract":"<div><div>In this study, N-hexyl-6-(4-methoxyphenyl)carbazole-3-carbaldehyde with donor-π-donor-acceptor (D-π-D-A) structure was designated as a probe <strong>N</strong> and its fluorescence sensor properties were investigated against 30 different analytes. Probe <strong>N</strong> in DMSO gave a structureless emission band with a maximum at 470 nm and a high photoluminescence quantum yield (80 %). In going from non-polar to polar solvents, the emission maximum of probe <strong>N</strong> red-shifted by 72 nm and Stokes shifts observed between absorption and emission spectra was 71 nm (3689 cm<sup>−1</sup>). It was found that the emission maximum of probe <strong>N</strong> at 470 nm was more significantly quenched by Fe<sup>3+</sup> than by Fe<sup>2+</sup> among the analytes studied. Probe <strong>N</strong> showed high selectivity and high sensitivity with a 0.8 nM limit of detection (LOD) against Fe<sup>3+</sup> in the presence of competing analytes. The LOD value is the lowest value reported so far for the detection of Fe<sup>3+</sup>. Job's plot indicated a 2:1 ratio between probe <strong>N</strong> and Fe<sup>3+</sup>. <sup>1</sup>H NMR and FT-IR provided further evidence that probe <strong>N</strong> complexed Fe<sup>3+</sup> via the non-bonding electrons on the oxygen atoms of the aldehyde and methoxy groups. In practical applications, probe <strong>N</strong> successfully detected Fe<sup>3+</sup>. These results revealed that probe <strong>N</strong> could be an effective turn-off fluorescence sensor in the determination of Fe<sup>3+</sup> in liquid environments.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121503"},"PeriodicalIF":3.6,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced luminescence through doping of CuInZnS core-shell quantum dots with Eu 铕掺杂CuInZnS核壳量子点增强发光性能

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-27 DOI: 10.1016/j.jlumin.2025.121498

Pengbo Zhu , Xiao Liu , Hao Ren , Yao Wang , Jun Li , Yan Zhang , Zhonglin Du , Qiao Wang , Soo Wohn Lee , Laurence A. Belfiore , Mikhail Artemyev , Jianguo Tang

{"title":"Enhanced luminescence through doping of CuInZnS core-shell quantum dots with Eu","authors":"Pengbo Zhu , Xiao Liu , Hao Ren , Yao Wang , Jun Li , Yan Zhang , Zhonglin Du , Qiao Wang , Soo Wohn Lee , Laurence A. Belfiore , Mikhail Artemyev , Jianguo Tang","doi":"10.1016/j.jlumin.2025.121498","DOIUrl":"10.1016/j.jlumin.2025.121498","url":null,"abstract":"<div><div>Due to the quantum confinement effect, the quantum dots (QDs) behave distinguished photo-/electro-luminescence property. However, due to so small size with 3–5 nm diameter, their surface defects cause spectral limitation and luminescent instabilities, which inhibited the applications of QDs in key areas. It should be very interesting if rich luminescence spectra of lanthanides can be used to enhance the emission and to extend the spectra of sulfide-base QDs. However, the sulfur repellency of lanthanide ions (such as Eu<sup>3+</sup>) is the negative factor. In this work, we incorporated lanthanide ions (Eu<sup>3+</sup>) complexes into QDs to realize this. Diketone (i.e., acetylacetone (ACAC)) and phenanthroline (Phen) were chosen as the ligands of Eu<sup>3+</sup> (i.e., Eu) chlorides. The experimental data indicated that the incorporating Eu<sup>3+</sup> complexes into the ZnS-modified CIZS QDs resulted in double enhancement of the luminescent intensity, the blue-shift of emission wavelength from 637 to 575 nm, the PLQY increase from 55.94 % to 81.56 %. Simultaneously, the Zn<sup>2+</sup> in the shell, under the influence of the Eu<sup>3+</sup>, reacted with oxygen vacancies in the environment. XRD shows the characteristic peaks of ZnO, indicating the formation of ZnO QDs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121498"},"PeriodicalIF":3.6,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growth by the LHPG technique and optical characterization of Ho3+-doped CNGG crystal fibers 掺杂Ho3+的CNGG晶体光纤的LHPG生长及光学特性

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-27 DOI: 10.1016/j.jlumin.2025.121502

Jun Zhang , Jian Liu , Longxin Liu , Chong Xu , Xiaodong Xu , Jun Xu , Kheirreddine Lebbou

{"title":"Growth by the LHPG technique and optical characterization of Ho3+-doped CNGG crystal fibers","authors":"Jun Zhang , Jian Liu , Longxin Liu , Chong Xu , Xiaodong Xu , Jun Xu , Kheirreddine Lebbou","doi":"10.1016/j.jlumin.2025.121502","DOIUrl":"10.1016/j.jlumin.2025.121502","url":null,"abstract":"<div><div>Ho:CNGG crystal fibers have been successfully grown by the laser-heated pedestal growth (LHPG) method for the first time. The absorption spectra, emission spectra, and the fluorescence decay curves of the crystal fibers were measured at room temperature. The absorption cross-sections at around 640 nm and 1992 nm were calculated, respectively. J-O theory was applied to analyze fluorescence properties of the Ho:CNGG crystal fiber. The intensity parameters Ω<sub>t</sub> (t = 2, 4, 6), radiative transition rates, branching ratios and radiative lifetime were calculated. Ho:CNGG exhibited strong emission at 2069 nm with a emission cross section of 3.07 × 10<sup>−21</sup> cm<sup>2</sup> and full width at half the maximum (FWHM) of 81 nm. The measured fluorescence lifetimes for samples with Ho<sup>3+</sup> concentrations of 0.5 at.%, 1.0 at.%, 1.5 at.%, and 2.0 at.% were determined to be 7.60 ms, 7.63 ms, 8.15 ms, and 7.98 ms, respectively. All the results indicate that Ho:CNGG crystal fiber grown by the LHPG method has potential as a laser gain medium for ultrashort laser system.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121502"},"PeriodicalIF":3.6,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of NaF and KF in photo and X-ray induced luminescence behaviors of Sm3+-doped lithium oxy-fluorophosphate glasses NaF和KF对Sm3+掺杂氧氟磷酸锂玻璃光致和x射线致发光行为的影响

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-27 DOI: 10.1016/j.jlumin.2025.121499

C.S. Sarumaha , E. Kaewnuam , N. Chanlek , N. Chanthima , S. Kothan , N. Intachai , A. Angnanon , P. Kanjanaboos , K. Choodam , H.J. Kim , J. Kaewkhao

{"title":"Effect of NaF and KF in photo and X-ray induced luminescence behaviors of Sm3+-doped lithium oxy-fluorophosphate glasses","authors":"C.S. Sarumaha , E. Kaewnuam , N. Chanlek , N. Chanthima , S. Kothan , N. Intachai , A. Angnanon , P. Kanjanaboos , K. Choodam , H.J. Kim , J. Kaewkhao","doi":"10.1016/j.jlumin.2025.121499","DOIUrl":"10.1016/j.jlumin.2025.121499","url":null,"abstract":"<div><div>Sm<sup>3+</sup>-doped lithium oxy-fluorophosphate glasses were successfully synthesized via the melt-quenching method, with partial substitution of P<sub>2</sub>O<sub>5</sub> by NaF and KF to investigate compositional effects on structural and optical properties. The incorporation of alkali fluorides led to an increase in density and a corresponding decrease in molar volume, indicating a more compact glass network. X-ray photoelectron spectroscopy (XPS) analysis revealed that NaF addition significantly enhanced the presence of non-bridging oxygens (NBOs), confirming the structural depolymerization. Photoluminescence (PL) and X-ray induced luminescence (XIL) measurements exhibited distinct trends: PL intensity was enhanced with NaF due to increased NBOs, while XIL intensity was higher with KF addition, possibly due to more efficient energy transfer from secondary electrons. Chromaticity analysis based on CIE coordinates confirmed the stable orange emission across all glass samples, with negligible spectral shift. These findings provide valuable insight into tailoring Sm<sup>3+</sup>-activated glass scintillations through compositional modifications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121499"},"PeriodicalIF":3.6,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144933042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Borate-based luminescent materials: A comprehensive review of structural influences on thermal stability and luminescence characteristics 硼酸基发光材料：结构对热稳定性和发光特性影响的综合综述

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-27 DOI: 10.1016/j.jlumin.2025.121490

Ashish Tiwari , S.J. Dhoble

{"title":"Borate-based luminescent materials: A comprehensive review of structural influences on thermal stability and luminescence characteristics","authors":"Ashish Tiwari , S.J. Dhoble","doi":"10.1016/j.jlumin.2025.121490","DOIUrl":"10.1016/j.jlumin.2025.121490","url":null,"abstract":"<div><div>Borate phosphors, with a rich developmental history spanning nearly a century have become indispensable in solid-state lighting. This review systematically classifies borate phosphors based on composition, crystal structure, and luminescence properties, encompassing rare earth, alkaline earth, and transition metal-doped variants, as well as single-phase, multiphase, orthoborate, and metaborate systems. A central focus is the intricate correlation between the host's coordination chemistry and the material's luminescent behavior. The fundamental mechanisms governing luminescence, such as basic f-f and d-f transitions, crystal field splitting, the nephelauxetic effect, energy transfer processes, and concentration quenching, are comprehensively discussed, alongside lattice dynamics and phonon interactions. The inherent robust nature of borate anionic groups, integrated into stable crystal lattices, is highlighted. We also reviewed recent breakthroughs in the field, presenting a new generation of sophisticated borates. Understanding this intricate structure-property relationship is paramount for the rational design of next-generation borate phosphors for advanced photonic applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121490"},"PeriodicalIF":3.6,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the upconversion tunability of unilamellar [SrTa2O7]2- nanosheets derived from Aurivillius Bi2SrTa2O9 探索单层[SrTa2O7]2-纳米片的上转换可调性

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-26 DOI: 10.1016/j.jlumin.2025.121495

Mohammadreza Khodabakhsh , Ugur Unal

{"title":"Exploring the upconversion tunability of unilamellar [SrTa2O7]2- nanosheets derived from Aurivillius Bi2SrTa2O9","authors":"Mohammadreza Khodabakhsh , Ugur Unal","doi":"10.1016/j.jlumin.2025.121495","DOIUrl":"10.1016/j.jlumin.2025.121495","url":null,"abstract":"<div><div>This study presents the first report on high-yield and large-sized unilamellar [SrTa<sub>2</sub>O<sub>7</sub>]<sup>2-</sup> nanosheets with upconversion (UC) properties derived from the Aurivillius phase Bi<sub>2</sub>SrTa<sub>2</sub>O<sub>9</sub>. By employing three-step exfoliation process using exfoliating agents with only moderate size differences—large enough to enable exfoliation while preventing excessive strain—we successfully obtained nanosheets with lateral dimensions reaching up to the micron scale. This controlled exfoliation approach minimizes nanosheet fragmentation, allowing the retention of large lateral sizes. One of the key advantages of Aurivillius phase perovskite oxides for UC applications is their relatively low lattice phonon energy, which is comparable to other well-known efficient UC host materials. The nanosheets were synthesized through a solid-state reaction with Er(III), Ho(III), Tm(III), and Yb(III) lanthanide doping, followed by selective acid washing and exfoliation. Structural analysis confirmed the successful incorporation of lanthanides into the perovskite layers, preserving UC behavior in the exfoliated nanosheets. The effect of sensitizer-to-activator ratio on UC emission was systematically investigated, revealing tunable multicolor emission. The nanosheets exhibit comparable emission characteristics to their bulk counterparts, demonstrating their potential for integration into optical applications. These findings highlight the viability of Aurivillius-based nanosheets as functional UC materials with tunable emission properties.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121495"},"PeriodicalIF":3.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","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 fluorescent low-energy proton tracks in lithium fluoride thin films on silicon substrates 硅衬底氟化锂薄膜中荧光低能质子径迹的检测

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-26 DOI: 10.1016/j.jlumin.2025.121496

Massimo Piccinini , Enrico Nichelatti , Valentina Nigro , Francesca Menchini , Marco Montecchi , Rosa Maria Montereali , Alessandro Ampollini , Concetta Ronsivalle , Maria Aurora Vincenti

{"title":"Detection of fluorescent low-energy proton tracks in lithium fluoride thin films on silicon substrates","authors":"Massimo Piccinini , Enrico Nichelatti , Valentina Nigro , Francesca Menchini , Marco Montecchi , Rosa Maria Montereali , Alessandro Ampollini , Concetta Ronsivalle , Maria Aurora Vincenti","doi":"10.1016/j.jlumin.2025.121496","DOIUrl":"10.1016/j.jlumin.2025.121496","url":null,"abstract":"<div><div>Recently, Fluorescent Nuclear Track Detectors (FNTDs) have been demonstrated in lithium fluoride (LiF) crystals exploiting the visible radiophotoluminescence (RPL) of F<sub>2</sub> and F<sub>3</sub><sup>+</sup> color centers (CCs). In this paper, solid-state radiation detectors based on LiF thin films, grown by thermal evaporation on Si(100) substrates, were tested as FNTDs with ∼1 MeV proton beams produced by the vertical low-energy extraction line of the TOP-IMPLART linear accelerator in operation at ENEA Frascati. They were irradiated with the film surface approximately parallel to the beam propagation direction (i.e. the cleaved film edge was directly exposed to the incident beam). For the first time, at fluences between 10<sup>7</sup> and 10<sup>8</sup> protons/cm<sup>2</sup>, luminescent images of single proton tracks were visualized in LiF films using a fluorescence microscope at high magnification. RPL spectra under continuous-wave blue laser excitation were also measured to study the behavior of the F<sub>2</sub> and F<sub>3</sub><sup>+</sup> emission bands, whose intensities show a different dependence on the excitation power. Increasing the proton beam fluence by two orders of magnitude, the superposition of a higher number of tracks allowed to fully detect the luminescent Bragg curve of the beam, even at this low proton energy. The energy spectrum of the proton beam was estimated by best fitting this luminescent Bragg curve, using FLUKA simulations of energy deposition in a LiF layer on Si. The layer was accurately modeled, and its density was derived from ellipsometric measurements of the refractive index.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121496"},"PeriodicalIF":3.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

808 nm-excited upconversion single-particle imaging for long-term tracking of cargo transport in live neurons 808纳米激发上转换单粒子成像用于活神经元货物运输的长期跟踪

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-25 DOI: 10.1016/j.jlumin.2025.121483

Tianli Zhai , Yanxin Zhang , Daoming Guan , Wenrui Zhang , Fan Ding , Xiaochen Qiu , Yunxiang Zhang , Qian Liu

{"title":"808 nm-excited upconversion single-particle imaging for long-term tracking of cargo transport in live neurons","authors":"Tianli Zhai , Yanxin Zhang , Daoming Guan , Wenrui Zhang , Fan Ding , Xiaochen Qiu , Yunxiang Zhang , Qian Liu","doi":"10.1016/j.jlumin.2025.121483","DOIUrl":"10.1016/j.jlumin.2025.121483","url":null,"abstract":"<div><div>Upconversion nanoparticles (UCNPs) activated by 808 nm excitation hold promise for bioimaging due to minimized water absorption and tissue heating. However, their luminescence efficiency and single-particle performance in complex biological systems remain limited. Here, we present a rationally designed core-multishell UCNP structure (NaYbF<sub>4</sub>: x%Er@NaYF<sub>4</sub>: y%Yb@NaYF<sub>4</sub>: z%Nd, 10 %Yb@NaYF<sub>4</sub>) optimized for enhanced upconversion luminescence (UCL) at the single-particle level under 808 nm excitation. By systematically tuning Er<sup>3+</sup> concentration in the emissive core, Yb<sup>3+</sup> in the energy migration shell, and Nd<sup>3+</sup> in the energy-harvesting layers, we achieved efficient energy spatial management. Single-particle analysis revealed power-dependent UCL saturation, with 12 % Er<sup>3+</sup> doping in the core, 10 % Yb<sup>3+</sup> doping in the migration shell, and 30 % Nd<sup>3+</sup> doping in the energy-harvesting layer yielding maximal brightness. These UCNPs were further surface-functionalized for live-cell imaging and enabled continuous cargo tracking in hippocampal neurons for over 30 min under 808 nm excitation. Trajectory analysis revealed hitchhiking-like transport dynamics within axons. This work highlights the potential of UCNPs for advanced biological imaging and mechanistic insights into nanoscale cargo dynamics in neurons.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121483"},"PeriodicalIF":3.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy migration and scintillation kinetics in compositionally complex (Gd1/4Y1/4Tb1/4Lu1/4)3Al5O12:Ce single crystal scintillator 组成络合物（Gd1/4Y1/4Tb1/4Lu1/4）3Al5O12:Ce单晶闪烁体中的能量迁移和闪烁动力学

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-25 DOI: 10.1016/j.jlumin.2025.121494

Rebecca Lalk , Yauhen Tratsiak , Nicholas Anastasi , Luis Stand , Charles L. Melcher , Mariya Zhuravleva

{"title":"Energy migration and scintillation kinetics in compositionally complex (Gd1/4Y1/4Tb1/4Lu1/4)3Al5O12:Ce single crystal scintillator","authors":"Rebecca Lalk , Yauhen Tratsiak , Nicholas Anastasi , Luis Stand , Charles L. Melcher , Mariya Zhuravleva","doi":"10.1016/j.jlumin.2025.121494","DOIUrl":"10.1016/j.jlumin.2025.121494","url":null,"abstract":"<div><div>It is well-established that compositional tuning through binary admixture can improve scintillation performance in several materials systems, including Ce-activated garnets. Although recent work on ternary or quaternary cation admixture shows promise, the impact of this increased compositional complexity on thermal stability and carrier-defect dynamics has not been addressed. Here, we investigate a compositionally complex garnet, (Gd<sub>1/4</sub>Y<sub>1/4</sub>Tb<sub>1/4</sub>Lu<sub>1/4</sub>)<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Ce (GYTLAG), grown by the Czochralski method using temperature-dependent photoluminescence (PL), PL decay, and thermoluminescence (TL). PL and PL decay measurements support a thermally activated Tb<sup>3+</sup>-Ce<sup>3+</sup> energy transfer, where Tb<sup>3+</sup> emission dominates below 60 K, but Ce<sup>3+</sup> emission increases from 20 to 300 K. Thermal quenching of Ce<sup>3+</sup> emission occurs around <em>T</em><sub><em>50</em></sub> = 508 K, with an activation energy of 0.6 eV. TL and wavelength-resolved TL spectra from 20 to 500 K show that GYTLAG contains similar trap groups to LuAG but with a broader distribution of glow peaks below room temperature, possibly caused by quaternary cation mixing. A combination of dose dependence, partial cleaning and initial rise, and glow curve fitting to a first order continuous Gaussian distribution model are used to understand the contribution of electronic point defects to scintillation decay and afterglow at room temperature. These results inform how increased compositional complexity influences recombination dynamics in garnet scintillators.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121494"},"PeriodicalIF":3.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Whispering gallery mode lasing in a fiber-coupled sub-millimeter Yb:CaF2 crystalline microcavity 光纤耦合亚毫米Yb:CaF2晶体微腔中的窃窃廊模式激光

IF 3.6 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-08-25 DOI: 10.1016/j.jlumin.2025.121479

Shuo Fan , Guoping Lin

{"title":"Whispering gallery mode lasing in a fiber-coupled sub-millimeter Yb:CaF2 crystalline microcavity","authors":"Shuo Fan , Guoping Lin","doi":"10.1016/j.jlumin.2025.121479","DOIUrl":"10.1016/j.jlumin.2025.121479","url":null,"abstract":"<div><div>We report on the fabrication and characterization of a Yb:CaF<sub>2</sub> whispering-gallery mode (WGM) microcavity. A disk with a radius of 0.56 mm was successfully fabricated from a 5% Yb:CaF<sub>2</sub> bulk crystal, exhibiting ultra-high optical quality factors (Q) of <span><math><mn>2.8</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>8</mn></mrow></msup></math></span> at 1550 nm and <span><math><mn>3</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>6</mn></mrow></msup></math></span> at 1064 nm. The 1064 nm Q factor of <span><math><mn>3</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>6</mn></mrow></msup></math></span> corresponds to an estimated absorption coefficient of <span><math><mn>2.8</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>4</mn></mrow></msup></math></span> cm<sup>−1</sup>. Leveraging the three-level energy structure of Yb<sup>3+</sup> ions, efficient 1064 nm laser emission was generated under 976 nm diode laser pump excitation. We investigated laser performance under two distinct coupling configurations: free-space pumping and angled-polished fiber (APF) coupling. The APF coupling method demonstrated better efficiency, achieving a low laser threshold of 3 mW and output power exceeding the mW level. These results demonstrate the promise of Yb:CaF<sub>2</sub> crystalline microcavities for compact, efficient, and potentially tunable microlaser sources.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121479"},"PeriodicalIF":3.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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