Indian Journal of Physics最新文献_第5页

Charge compensation-driven downconverted luminescence enhancement in Er3+-doped SrTiO3 phosphors by co-doping with alkali ions (M+ = Li, Na, K) for solid-state lighting applications 电荷补偿驱动的Er3+掺杂SrTiO3荧光粉与碱离子（M+ = Li, Na， K）共掺杂在固态照明中的下转换发光增强

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-30 DOI: 10.1007/s12648-024-03432-9

Ishant Kumar, Yashwinder, Avinash Kumar, Sandeep Kumar, Himani Thakur, Arvind K. Gathania

{"title":"Charge compensation-driven downconverted luminescence enhancement in Er3+-doped SrTiO3 phosphors by co-doping with alkali ions (M+ = Li, Na, K) for solid-state lighting applications","authors":"Ishant Kumar,  Yashwinder, Avinash Kumar, Sandeep Kumar, Himani Thakur, Arvind K. Gathania","doi":"10.1007/s12648-024-03432-9","DOIUrl":"10.1007/s12648-024-03432-9","url":null,"abstract":"<div>In this study, we synthesized near-ultraviolet (n-UV) excitable green-emitting SrTiO3: x Er3+ (1% ≤ x ≤ 6%) phosphors using the solution combustion method. To address charge compensation issues, alkali metal ions (Li+, Na+, and K+) were co-doped into the SrTiO3: 3%Er3+ phosphor. Characterization of the synthesized phosphor included phase identification and morphology analysis using powder X-ray Diffraction and field emission scanning electron microscopy, respectively. Additionally, fourier transform infrared spectroscopy was employed for vibrational studies. Photoluminescence (PL) emission spectra revealed green emission attributed to the transitions of Er3+ ions. Concentration quenching was observed beyond a 3 mol % doping level, and Dexter’s theory was applied to elucidate the interaction mechanisms responsible for this phenomenon. Lifetime studies were conducted on the synthesized phosphors to evaluate various decay parameters. An enhancement in PL emission due to charge compensation was observed when SrTiO3:Er3+ was co-doped with alkali metal ions such as Li+, Na+, and K+. Maximum PL emission was observed in SrTiO3: 3% Er3+, 3% Na+ phosphor. Color coordinates (CIE coordinates) were determined for SrTiO3:Er3+ and SrTiO3:Er3+, Na+ phosphors. The observed high color purity (~ 80%) suggests that the synthesized phosphor could be effectively used as a green component in solid-state lighting applications.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 6","pages":"2033 - 2042"},"PeriodicalIF":1.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Design and analysis of low-loss and low-dispersion hybrid cladding tube antiresonant fiber for the THz regime 太赫兹区低损耗低色散混合包层管抗谐振光纤的设计与分析

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-30 DOI: 10.1007/s12648-024-03422-x

Maharaja Balaji, Sathiyan Samikannu

{"title":"Design and analysis of low-loss and low-dispersion hybrid cladding tube antiresonant fiber for the THz regime","authors":"Maharaja Balaji, Sathiyan Samikannu","doi":"10.1007/s12648-024-03422-x","DOIUrl":"10.1007/s12648-024-03422-x","url":null,"abstract":"<div>This article aims to highlight the development of a novel antiresonant fiber with a hollow core and four elliptical and circular cladding tubes for terahertz communication applications. The fiber substrate material is Zeonex, and its performance is analyzed using COMSOL Multiphysics software with an operating frequency of 0.5(-)2.8 THz. Based on the variation of cladding tube dimensions, the fiber performance is analyzed with distinct tube thicknesses (t) of 0.08, 0.10, and 0.12 mm. This fiber model has been revealed low confinement loss (CL) of 1.02(times 10^{-6}) (dBcm^{-1}) at a tube thickness of 0.10 mm, negligible effective material loss (EML) of 6.36(times 10^{-6}) (dBcm^{-1}), propagation loss of 9.50(times 10^{-6}) (dBcm^{-1}) and a broad low-loss transmission bandwidth of 0.9 THz. Additionally, it exhibits a near-flat zero dispersion bandwidth of 1.3 THz, a maximum power fraction of 99.9(%), and a higher order mode extinction ratio (HOMER) of 220. Analysis was also made of confinement loss for the proposed fiber’s higher-order modes (HOMs).</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 5","pages":"1899 - 1908"},"PeriodicalIF":1.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

One sided sequential sharing of tripartite nonlocality for pure and mixed three-qubit states 纯和混合三量子位态的三方非定域的单向顺序共享

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-28 DOI: 10.1007/s12648-024-03331-z

Sk Sahadat Hossain

{"title":"One sided sequential sharing of tripartite nonlocality for pure and mixed three-qubit states","authors":"Sk Sahadat Hossain","doi":"10.1007/s12648-024-03331-z","DOIUrl":"10.1007/s12648-024-03331-z","url":null,"abstract":"<div>Tripartite nonlocality holds significant theoretical value and has numerous applications in quantum information and computation. With dichotomic measurement settings, several aspects of tripartite nonlocality are identified by violations of the Svetlichny inequality, Mermin inequality, the 46 facet inequalities of Sliwa, and the inequalities established by Bancal et al. Silva et al. explored the concept of nonlocality sharing among multiple copies of a party. This paper focuses on determining the number of observers who can simultaneously share distinct tripartite nonlocal correlations under a one-sided sequential measurement formalism. Specifically, we examine a scenario where three spatially separated parties-Alice, Bob, and multiple Charlies-share three spin- (frac{1}{2}) particles. For multiple Charlies, we have identified constraints on (theta) (pure state) and p (mixed state), demonstrating the sequential sharing of various forms of tripartite nonlocality with a single Alice and Bob. Notably, under sequential measurement formalism, a non-maximally pure entangled state exhibits the same sharing capacity as a maximally entangled state.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 2","pages":"581 - 590"},"PeriodicalIF":1.6,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Superparamagnetism in the decorated square and triangular Blume-Capel Ising systems by mean-field theory 用平均场理论研究装饰方形和三角形Blume-Capel - Ising系统的超顺磁性

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-28 DOI: 10.1007/s12648-024-03396-w

Aqeel Raad Ghafel, Hadey K. Mohamad

{"title":"Superparamagnetism in the decorated square and triangular Blume-Capel Ising systems by mean-field theory","authors":"Aqeel Raad Ghafel, Hadey K. Mohamad","doi":"10.1007/s12648-024-03396-w","DOIUrl":"10.1007/s12648-024-03396-w","url":null,"abstract":"<div>In the molecular mean-field approximation, comparable studies have been done for decorated ferrimagnetic mixed spin square and triangular systems. Based on the Blume-Capel Ising model, it has been evaluated the results of the study. The proposed research paper has tested the square and triangular lattices for the effect of crystal fields and external magnetic fields on ferrimagnetic mixed spin-3/2 and spin-7/2 decorated devices, respectively. It is worth noting that spin-3/2 ions are located as nodal, and in the surroundings of the lattice, there are four or six other spin-7/2 ions. Therefore, one can create superparamagnetic behaviors by altering exchange interactions with various crystal fields or external magnetic fields. New features have been found that the mixed spin square or triangular decorated ferrimagnets make superparamagnetism in the different values of (K_{B} T/left| {J_{2} } right|), with fixed values of DA/|J2|= 8, DB/|J2|= − 11, and J1 = − 0.5, J2 = 1, for mixed spin square and triangular lattices, respectively.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 4","pages":"1347 - 1359"},"PeriodicalIF":1.6,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Dual-functional grating splitter with high efficiency at the second-order Littrow incidence 具有二阶利特罗入射高效率的双功能光栅分频器

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-26 DOI: 10.1007/s12648-024-03418-7

Xuantong Shi, Bo Wang, Zherui Cui, Jinjie Li, Hongwei Zhan

引用次数: 0

Dynamic waveforms of the new Hamiltonian amplitude model using three different analytic techniques 新哈密顿振幅模型的动态波形采用三种不同的分析技术

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-26 DOI: 10.1007/s12648-024-03426-7

Noor Alam, Ali Akbar, Mohammad Safi Ullah, Md. Mostafa

引用次数: 0

Physical and optical properties of Nd3+ co-doped Al in sol–gel silicate glasses Nd3+共掺Al在溶胶-凝胶硅酸盐玻璃中的物理光学性质

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-26 DOI: 10.1007/s12648-024-03430-x

K. M. S. Dawngliana, S. Rai

{"title":"Physical and optical properties of Nd3+ co-doped Al in sol–gel silicate glasses","authors":"K. M. S. Dawngliana, S. Rai","doi":"10.1007/s12648-024-03430-x","DOIUrl":"10.1007/s12648-024-03430-x","url":null,"abstract":"<div>The optical properties of varying concentrations of Nd3 + ions co-doped with Al in the chemical compositions (80-x)SiO2 + 20Al2O3 + xNdF3 (SiAlNd), where x = 0.6, 1.2, 1.8, and 2.4 mol%, were investigated using the sol–gel method. Structural characterization was carried out using XRD and FTIR techniques. It was found that the polarizability of oxide ions increased with the concentration of rare earth ions, as evidenced by the observed values of density, refractive index, and Nd3+ ion concentration in the glasses. Even after heating to 800 °C, XRD results indicated that the prepared glass samples remained amorphous. FTIR was employed to identify the functional groups present in the synthesized sol–gel silica glass. The UV–Vis-NIR absorption spectra revealed seven peaks, corresponding to the excitation of electrons from the ground state 4I9/2 to 4G9/2 (~ 513 nm), 4G7/2 (~ 528 nm), 4G5/2 + 2G7/2 (~ 585 nm), 2H11/2 (~ 622 nm), 4F9/2 (~ 684 nm), 4F7/2 + 4S3/2 (~ 747 nm), 4F5/2 + 2H9/2 (~ 807 nm), and 4F3/2 (~ 878 nm). The Judd–Ofelt intensity parameters were derived from the absorption spectra of Nd3+-co-doped alumino-silicate glass. The fluorescence properties were also examined by assessing the radiative lifetime (τR), luminescence branching ratio (βR), and spontaneous transition probability (AR).</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 6","pages":"2231 - 2240"},"PeriodicalIF":1.6,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Hierarchical microstructure in mesoporous SnO2 beads 介孔二氧化锡珠中的分层微结构

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-25 DOI: 10.1007/s12648-024-03419-6

Suresh Koppoju, Tarun Babu Mangalarapu, Easwaramoorthi Ramasamy

{"title":"Hierarchical microstructure in mesoporous SnO2 beads","authors":"Suresh Koppoju, Tarun Babu Mangalarapu, Easwaramoorthi Ramasamy","doi":"10.1007/s12648-024-03419-6","DOIUrl":"10.1007/s12648-024-03419-6","url":null,"abstract":"<div>Tin oxide (SnO2) mesoporous beads are a significant category of nanostructured materials with extensive applications in sensors and energy storage. In this study, we report the microstructural evolution of the mesoporous SnO2 beads, particularly focusing on the formation of primary SnO2 particles. The beads were synthesized through a solvothermal method and subsequently underwent heat treatment (calcination). The beads maintained a spherical shape regardless of the solvothermal temperature, which varied between 140 and 180 °C, causing the average bead size to increase from 120 to 550 nm. Initially, the beads were amorphous but became crystalline post-calcination at temperatures of 400 °C and above. SAXS data analysis indicated that the as-prepared beads contain a heterogeneous structure consisting of a tin-rich organic complex network with particle sizes ranging from 1.2 to 1.4 nm. Upon calcination at 300 °C and above, the size of these primary crystalline SnO2 particles increases. It was determined from combined SAXS and XRD studies that these primary crystalline particles originate from an amorphous precursor in the as-prepared beads. The mesoporous structure forms only after calcination of the beads at 400 °C or higher due to the dissociation and evaporation of polyvinyl pyrrolidone (PVP), leaving empty spaces between the primary crystalline SnO2 particles.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 5","pages":"1709 - 1719"},"PeriodicalIF":1.6,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Investigation of chirped solutions in optical metamaterials having parabolic law nonlinearity and space-time dispersion 具有抛物律非线性和时空色散的光学超材料啁啾解的研究

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-25 DOI: 10.1007/s12648-024-03425-8

Shuang Li, Xing-Hua Du

引用次数: 0

Optimizing the performance of perovskite-based organic solar cells via graphene integration as the hole transport layer: a comprehensive analysis 通过石墨烯集成作为空穴传输层优化钙钛矿基有机太阳能电池的性能：综合分析

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-25 DOI: 10.1007/s12648-024-03420-z

M. ElMasfioui, S. Bahsine, M. M. Shabat, F. Lmai, A. Elbiyaali, F. Allali

{"title":"Optimizing the performance of perovskite-based organic solar cells via graphene integration as the hole transport layer: a comprehensive analysis","authors":"M. ElMasfioui, S. Bahsine, M. M. Shabat, F. Lmai, A. Elbiyaali, F. Allali","doi":"10.1007/s12648-024-03420-z","DOIUrl":"10.1007/s12648-024-03420-z","url":null,"abstract":"Perovskite solar cells ((PSCs)), despite achieving efficiencies above (25text{%}), face concerns about structural stability due to organic compounds. This study focuses on modeling a stable, inorganic PSC using (Cs{GeI}_{3}) within the SCAPS-1D framework. Employing carbon-based electron transport layers and copper-based hole transport layers, along with graphene integration, enhances electrical and thermal conductivity. Among four configurations, the n-perovskite/perovskite/CZTSSe/Gr arrangement exhibits promising results: (1.1377 V) ({V}_{oc}), (22.62 mA/c{m}^{2}) ({J}_{sc}), (87.42text{%}) fill factor, and a (22.50text{%}) power conversion efficiency. The analysis explores factors impacting performance, such as quantum efficiency, electric field strength, interface properties, layer characteristics, doping concentration, and temperature. It also evaluates resistance factors, interface defects, and the influence of reflection coatings, presenting a comprehensive understanding of the introduced efficient (PSC) configuration in the context of inorganic materials, especially those with cesium incorporation.","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 5","pages":"1721 - 1737"},"PeriodicalIF":1.6,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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