Optical Materials最新文献

{"title":"Linear polarization restoration using electro-tunable 90° twisted nematic liquid crystals for precision light manipulation","authors":"Yi-Xuan Liu,&nbsp;Pravinraj Selvaraj,&nbsp;Yun-Jen Tsai,&nbsp;Ko-Ting Cheng","doi":"10.1016/j.optmat.2025.117253","DOIUrl":"10.1016/j.optmat.2025.117253","url":null,"abstract":"<div><div>This study proposed a linear polarization restorer using an electro-tunable 90°-twisted nematic liquid crystal (90°-TNLC) cell. This approach can modulate linearly polarized light with a deviant polarization direction to a specific direction by applying corresponding AC electric stimuli. In addition, the device provides ∼80 % light transmittance while precisely correcting the deviation of the transmitted light's linear polarization, as demonstrated through experimental data and 1D-DIMOS simulation. Furthermore, the prepared device exhibits low light loss, a low threshold voltage, a low operating voltage, and a simple optical configuration. These distinct advantages indicate the great application potential of the proposed device in fiber-optic technologies, spatial light modulators, and other systems that rely on optical activity.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117253"},"PeriodicalIF":3.8,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322266","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}

{"title":"Ag2S/NiCo2S4 heterojunction photodetector for high-sensitivity visible-NIR detection","authors":"Sameera Tanooj Chamarty,&nbsp;Sushmee Badhulika","doi":"10.1016/j.optmat.2025.117252","DOIUrl":"10.1016/j.optmat.2025.117252","url":null,"abstract":"<div><div>A high-performance Ag₂S/NiCo₂S₄ heterojunction photodetector was fabricated using a low-cost SILAR process on a flexible cellulose paper substrate for wearable and broadband optoelectronic applications. XRD pattern guaranteed monoclinic Ag₂S and cubic spinel NiCo₂S₄ formation, and SEM images revealed a well-defined nanostructured morphology. UV–Vis spectroscopy revealed broad spectral absorption with bandgaps of 1.2 eV (Ag₂S) and 2.4 eV (NiCo₂S₄) to ensure efficient photodetection in visible and NIR regime. The device showed large responsivities of 57.17 mA/W (visible) and 1.669 A/W (NIR), and fast response and recovery times of 7.34s (NIR) and 13.85s (visible). The staggered band alignment efficiently separates charge carriers, minimizing recombination losses The device also exhibits excellent mechanical stability and continues to operate after 1100 cycles of bending, suggesting its suitability at wearable and flexible electronics. Due to the broadband response, high responsivity, and mechanical stability, this Ag₂S/NiCo₂S₄ heterojunction photodetector is promising for diverse optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117252"},"PeriodicalIF":3.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322268","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}

{"title":"CsPbBr3 perovskite nanocrystals embedded in boro-silicate glasses doped with Pr2O3 for green color converters","authors":"Devarajulu Gelija,&nbsp;Hyun-ah Kim,&nbsp;Woon Jin Chung","doi":"10.1016/j.optmat.2025.117251","DOIUrl":"10.1016/j.optmat.2025.117251","url":null,"abstract":"<div><div>Borosilicate-based CsPbBr₃ perovskite nanocrystal embedded glasses (PNEGs) and glass ceramics doped with Pr³⁺ were successfully synthesized using a melt-quench technique and subsequent heat-treatment process as an inorganic color converter for display applications. The glass ceramics were doped with Pr₂O₃ to manipulate the spectral and optical characteristics of the PNEGs and thereby extend the application of PNEGs as an efficient color converter for various display devices. The influence of Pr₂O₃ on the photo-luminescence (PL) and time-resolved PL characteristics was investigated. The formation of CsPbBr₃ perovskite nano-crystals (PNCs) within the glass matrix was examined by X-ray diffraction (XRD) and transmission electron microscope (TEM). The Pr³⁺-doped CsPbBr₃ PNEG and K₂SiF₆:Mn⁴⁺ (phosphor) were utilized as green and red color converters, respectively, to obtain a white light emission with a remote phosphor in silicone (PiS) structure, which achieved a wide color gamut of up to ∼136.8 % of the national television system committee (NTSC) defined area.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117251"},"PeriodicalIF":3.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322267","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}

{"title":"Encapsulated multi-resonance TADF dendrimer with AIEE property for efficient solution-processed narrowband deep-blue OLEDs","authors":"Wenhao Zhang ,&nbsp;Xinxin Qian ,&nbsp;Wenli Shi,&nbsp;Jiangqi Jiang,&nbsp;Hai Zhou,&nbsp;Zhijie Wu,&nbsp;Zongyu Yang,&nbsp;Xinxin Ban,&nbsp;Yumeng Xin","doi":"10.1016/j.optmat.2025.117163","DOIUrl":"10.1016/j.optmat.2025.117163","url":null,"abstract":"<div><div>The utilization of multiple resonances (MR) thermally activated delayed fluorescence (TADF) materials for solution-processed organic light-emitting diodes (OLEDs) faced notable challenges in severe aggregation-caused quenching (ACQ) issues. Here, we successfully developed a narrow-band deep blue MR-TADF dendrimer (2CzphQAO) for solution-processed OLEDs by introducing three flexible carbazole branches around carbonyl/N emissive core as encapsulated unit. The branches connected by alkyl chains can not only effectively avoid the severe aggregation quenching of narrowband emission, but also improve its solubility in conventional organic solvents. In addition, 2CzphQAO also exhibits clear aggregation-induced emission enhancement (AIEE) properties in the molecular packaging state, which can effectively promote exciton utilization without causing spectral broadening. The resultant encapsulated MR-TADF dendrimer was able to show bright deep-blue emission peaked at 438 nm with a full width at half maximum (FWHM) of 47 nm. The solution-processed OLEDs based on the dendrimer achieved a maximum external quantum efficiency (EQE max) of 12.1 % with Commission Internationale de l’Eclairage (CIE) coordinate of (0.13,0.14), which is among the promising device efficiency of solution-processed narrowband deep blue OLEDs. This study demonstrates that the encapsulation of rigid MR-TADF molecule will be a feasible strategy for design efficient solution-processable OLEDs with high color purity.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117163"},"PeriodicalIF":3.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298770","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}

{"title":"From laboratory to prototype: the last-mile issue in whispering gallery mode resonator-based devices","authors":"Simone Berneschi,&nbsp;Daniele Farnesi,&nbsp;Gabriele Frigenti,&nbsp;Stefano Pelli,&nbsp;Gualtiero Nunzi Conti,&nbsp;Silvia Soria","doi":"10.1016/j.optmat.2025.117248","DOIUrl":"10.1016/j.optmat.2025.117248","url":null,"abstract":"<div><div>The exceptional confinement, spatial and temporal, of photons inside whispering gallery mode resonators (WGMRs) give them exceptional characteristics across diverse fields, including quantum optics, nonlinear photonics, sensing, and microlasers, owing to their ultra-high quality factors (Q), small modal volumes, and strong light-matter interaction, allowing them to be ideal devices for different applications. Reliable commercial devices or prototypes have been proposed and built in the last decade, however having a packaged WGMR device with vibration isolation, air tightness and/or temperature adaptability is not an easy task.</div><div>In this review we will describe the different types of WGMRs, the emerging strategies for advancing WGMR-based technologies, including scalable integration approaches, and environmental isolation techniques. Moreover, the coupling techniques, and the transition from bulky laboratory setups to more compact prototypes and some successful commercialized devices are explored. By addressing these key challenges, this work outlines a set of guidelines aimed at bridging the gap between high-performance laboratory prototypes and practical, market-ready WGMR-based photonic systems.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117248"},"PeriodicalIF":3.8,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312975","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}

{"title":"Enhanced photoluminescence of a novel red-emitting phosphor of CaLaGaO4:Eu3+ by lithium ion doping","authors":"Yan Zhao,&nbsp;Zhonghui Li,&nbsp;Jiaxu Wang,&nbsp;Xingsheng Zhao,&nbsp;Changli Liu,&nbsp;Jifeng Ban,&nbsp;Xinlong Zhang,&nbsp;Hengwei Zhou,&nbsp;Xiaokang Jiang","doi":"10.1016/j.optmat.2025.117229","DOIUrl":"10.1016/j.optmat.2025.117229","url":null,"abstract":"<div><div>CaLaGaO₄:Eu³⁺ and Li ⁺ -doped CaLaGaO₄:30 %Eu³⁺ series phosphors were synthesized via high-temperature solid-state reactions. The results show that these phosphors can be efficiently excited by near-ultraviolet light at 392 nm and emit intense red light at 609 nm. The red emission at 609 nm corresponds to the hypersensitive electric dipole transition of Eu³⁺ (⁵D₀ → ⁷F₂). Upon reaching 30 % Eu³⁺ doping concentration, a distinct concentration quenching phenomenon emerges. Subsequent Li⁺ co-doping investigation demonstrates that incorporating 0.5 % Li⁺ induces remarkable luminescence enhancement: (1) The room-temperature fluorescence intensity exhibits 1.56-fold augmentation compared to Li⁺-free counterparts; (2) The absolute quantum yield (QY) increases from 11.3 % to 21.6 %, representing 91.2 % relative improvement; (3) Thermal stability characterization reveals 81.9 % intensity retention at 498 K (vs. 75.0 % in undoped system), corresponding to 9.2 % relative enhancement in thermal endurance. These findings suggest that the introduction of Li⁺ can effectively sensitize and enhance the fluorescence properties of the host matrix, offering a promising strategy for improving the performance of fluorescent materials.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117229"},"PeriodicalIF":3.8,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290676","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}

{"title":"Processes accompanying ablation in thin-film and bulk chalcogenide glass As2Se3 under multipulse femtosecond laser irradiation","authors":"Alexandra Shamova ,&nbsp;Dmitry Polyakov ,&nbsp;Vladimir Golubkov ,&nbsp;Dmitrii Pankin ,&nbsp;Alexander Shimko ,&nbsp;Galina Shandybina","doi":"10.1016/j.optmat.2025.117232","DOIUrl":"10.1016/j.optmat.2025.117232","url":null,"abstract":"<div><div>This paper studies the physicochemical processes accompanying ablation in thin-film and bulk arsenic selenide (As₂Se₃) under multipulse femtosecond laser irradiation in the visible and near-IR ranges. The morphological features of the irradiated samples and the chemical composition of the laser ablation products were studied using digital optical microscopy and Raman spectroscopy. For the first time, self-organized microstructures with a period on the order of the wavelength oriented parallel to the polarization vector were experimentally observed on As₂Se₃ thin films. Numerical modelling of the spatiotemporal distribution of As₂Se₃ complex refractive index allowed us to propose a formation mechanism for these structures based on the dynamic waveguide model. For bulk samples, the analysis of Raman spectra and assessments of the influence of the incubation effect and accumulative surface heating revealed that in the megahertz repetition rate range of femtosecond laser pulses, redox processes develop in the vapor phase, facilitating the formation of amorphous selenium (<em>a</em>-Se) and toxic arsenolite (As₂O₃) crystals in the deposited products. The results obtained are of interest for the fabrication of chalcogenide optical functional devices for IR photonics and the development of chalcogenide glass-based components in high-power laser systems.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117232"},"PeriodicalIF":3.8,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144510932","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}

{"title":"Highly visible photoluminescence in biocompatible liquids obtained by rehydration of Saccharina latissima algae at room temperature","authors":"L. Torrisi ,&nbsp;G. Genovese ,&nbsp;D. Spagnuolo ,&nbsp;D. Lombardo ,&nbsp;A. Torrisi ,&nbsp;M. Cutroneo","doi":"10.1016/j.optmat.2025.117245","DOIUrl":"10.1016/j.optmat.2025.117245","url":null,"abstract":"<div><div>The rehydration process of air-dried algae <em>Saccharina latiss</em>ima, obtained with distilled water and/or with phosphate-buffered saline solution (PBS), led to the formation of a highly photoluminescent liquid. The structure-function relationships for the bioactivities of these algae are still little known and undisclosed. The aim of this work is twofold: to describe the surprising behavior of the <em>Saccharina latiss</em>ima when it is rehydrated at room temperature and to attempt its release in liquids that appear photoluminescent under UV excitation.</div><div>Rehydration seems to release nanometric-sized molecules into the liquid, making it absorbent in the near UV. Polysaccharides and phenols, released by the algae, act as quantum dots dispersed in the liquid. The absorption of UV light by the liquid, at 365 nm, induces luminescence in the visible wavelength region with high emission in the blue band, around 478 nm. Further release removes larger nanoparticles that emit first in the green-yellow regions and subsequently in the brown-orange-red regions.</div><div>Characterization measurements of the biocompatible luminescent liquid were performed by considering optical spectroscopies in the UV, Visible, and IR ranges, and electron microscopy.</div><div>Possible applications, such as bioimaging, diagnostics, and therapy, together with the possibility to realize luminescent films and devices, are proposed, and some are described as well.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117245"},"PeriodicalIF":3.8,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290674","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}

{"title":"Construction of 2D/3D biochar modified g-C3N4 for efficient removal of tetracycline hydrochloride via photocatalytic PMS activation","authors":"Fukang Feng ,&nbsp;Xiaoyu Zhang ,&nbsp;Xusheng Xu ,&nbsp;Qianyi Huang ,&nbsp;Haixia Yin ,&nbsp;Ruonan Li ,&nbsp;Guangyu Wu ,&nbsp;Weinan Xing","doi":"10.1016/j.optmat.2025.117246","DOIUrl":"10.1016/j.optmat.2025.117246","url":null,"abstract":"<div><div>The conversion of abundant forestry/agricultural residues into value-added photocatalytic materials represents a sustainable strategy for environmental remediation. This study reports a one-step synthesis of wood flour-derived biochar (BC) coupled with 3D flower-like g-C₃N₄ (3D CN) to address the inherent limitations of rapid charge recombination and poor light absorption in bulk g-C₃N₄. Comprehensive characterization revealed that BC incorporation significantly enhanced both charge separation and light-harvesting capabilities. When applied in peroxymonosulfate (PMS) activation under visible light, the optimized 3D BC-CN60 composite demonstrated remarkable tetracycline hydrochloride (TC) degradation efficiency, achieving a first-order kinetic constant (56.04 × 10⁻³ min⁻¹) 5.27-fold higher than pristine 3D CN. Systematic investigations of operational parameters (catalyst dosage, calcination temperature, TC concentration, PMS content, and pH) yielded optimal conditions achieving 98.04 % TC removal within 60 min. Radical quenching experiments identified ¹O₂, •SO₄⁻ as well as •OH as the predominant reactive species, while intermediate analysis proposed two possible degradation pathways. The significantly improved photocatalytic performance is attributed to BC's dual function as both an electron acceptor and conductive bridge, which effectively suppresses charge recombination while promoting interfacial electron transfer. This work provides fundamental insights into biomass-derived carbon materials for designing efficient photocatalytic systems, demonstrating the potential of agricultural waste utilization in advanced oxidation processes for antibiotic wastewater treatment.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117246"},"PeriodicalIF":3.8,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290675","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}

{"title":"Eu2+/Eu3+ doped Al2O3 coatings formed on tungsten by plasma electrolytic oxidation: photoluminescent properties and application in luminescence thermometry","authors":"Stevan Stojadinović ,&nbsp;Pedro Nelson ,&nbsp;Sanja Kuzman ,&nbsp;Jovana Periša ,&nbsp;Zoran Ristić ,&nbsp;Aleksandar Ćirić","doi":"10.1016/j.optmat.2025.117244","DOIUrl":"10.1016/j.optmat.2025.117244","url":null,"abstract":"<div><div>Plasma electrolytic oxidation (PEO) was employed to synthesize Eu²⁺/Eu³⁺ doped Al₂O₃ coatings on tungsten substrates using an alkaline phosphate electrolyte containing Eu₂O₃ particles at ambient conditions, eliminating the need for high-temperature or reducing atmospheres. The structural, morphological, and photoluminescence (PL) properties of the coatings were investigated. X-ray diffraction (XRD) confirmed the formation of alpha Al₂O₃ as the dominant phase. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) analysis demonstrated uniform coatings with increasing europium content at higher Eu₂O₃ concentrations. The PL spectra exhibited characteristic emissions from both Eu²⁺ (broadband 4<em>f</em>⁶5<em>d</em>¹ → <em>4f</em>⁷) and Eu³⁺ (sharp ⁵<em>D</em>₀ → ⁷<em>F</em>_J) transitions, confirming the coexistence of both valence states. Eu³⁺ excitation spectra feature a charge transfer band and 4<em>f</em>-4<em>f</em> transitions. There is a negligible energy transfer between Eu²⁺ and Eu³⁺ ions. The local coordination of Eu³⁺ and Eu²⁺ ions in Al₂O₃ coatings is analyzed using the PL spectra, showing that both ions are in low-symmetry sites. The luminescence intensity ratio (<em>LIR</em>) of Eu²⁺/Eu³⁺ emissions was utilized for optical thermometry from 300 K to 650 K, showing a quasi-Boltzmann temperature dependence. The temperature-dependent PL studies revealed high absolute sensitivity (0.0008 K⁻¹ @ 575 K), demonstrating the potential of Eu²⁺/Eu³⁺ doped Al₂O₃ coatings for contactless luminescence thermometry applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"167 ","pages":"Article 117244"},"PeriodicalIF":3.8,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289058","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}