ACS Applied Optical Materials最新文献

{"title":"Spectral Learning and Inverse Design of Broadband Infrared Absorbers","authors":"Nguyen T. T. Duyen,&nbsp;Ngo T. Que,&nbsp;Quynh Le-Van,&nbsp;Do T. Nga,&nbsp;Vu D. Lam,&nbsp;Harit Keawmuang,&nbsp;Junsuk Rho,&nbsp;Anh D. Phan","doi":"10.1021/acsaom.6c00381","DOIUrl":"https://doi.org/10.1021/acsaom.6c00381","url":null,"abstract":"<p>Designingbroadband metamaterial absorbers with high absorptionover a wide spectral range remains a significant challenge. Here,we develop an integrated simulation and machine-learning frameworkfor the rapid modeling and design of broadband metamaterial absorbers.Electromagnetic simulations are first performed and benchmarked againstprevious studies and experimental data. From these, we find that thedielectric function is crucial for accurate spectral prediction andselect an optimal material system and construct a training dataset.Machine-learning models are then used for forward prediction, inversedesign, and spectral correlation analysis with all tasks achievingaccuracies above 93%. These results show that the proposed frameworkcan reduce the computational effort required for parameter explorationand accelerate the design of broadband infrared absorbers.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2641–2651"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Qualitative Prediction and Quantitative Illustration of Eu3+ → Eu2+ Self-Reduction in Sr4Al14O25:Eu Phosphors Using Preferential Occupancy Site Theory (POST) for Tunable wLED and Ratiometric Temperature Sensing","authors":"Jie Li,&nbsp;Bing Zhao,&nbsp;Yisha Zhang,&nbsp;Shaohai Pang,&nbsp;Ling Li,&nbsp;Xiaoguang Liu,&nbsp;Junpeng Xue","doi":"10.1021/acsaom.6c00398","DOIUrl":"https://doi.org/10.1021/acsaom.6c00398","url":null,"abstract":"<p>A high-temperaturesolid-state method was employed to synthesizepure-phase Sr₄Al₁₄O₂₅:Eu matricesand their phosphors under corresponding conditions, providing a robustexperimental foundation for their promising applications in tunablewhite light-emitting diode (wLED) and ratiometric temperature sensing.The Preferential Occupancy Site Theory (POST) was employed to quantitativelycalculate the preferential occupancy sites of Eu³⁺ andEu²⁺ and to qualitatively predict the Eu³⁺ →Eu²⁺ self-reduction phenomenon in Sr₄Al₁₄O₂₅. The calculation results are in perfect agreementwith experimental facts, as confirmed by photoluminescence (PL) andX-ray photoelectron spectroscopy (XPS) analyses. Firstly, X-ray diffraction(XRD) characterization confirms that the synthesized phosphors possessa single-phase orthorhombic crystal structure with the <em>Pmma</em> space group. Secondly, the influence of Eu³⁺ and Eu²⁺ doping on the luminescent properties was then investigatedvia photoluminescence (PL) spectroscopy. The self-reduction phenomenonof Eu³⁺ to Eu²⁺ in Sr₄Al₁₄O₂₅:Eu³⁺ was confirmed by comparing the PLspectra of samples synthesized under reducing atmosphere versus airatmosphere. The sample prepared in a reducing atmosphere exhibitedimportant emission from Eu²⁺, while for the sample preparedin air, the characteristic emission peaks of Eu³⁺ and Eu²⁺ were observed, confirming the partial self-reduction ofEu³⁺ to Eu²⁺ in samples synthesized under airatmosphere. In addition, X-ray photoelectron spectroscopy (XPS) resultsdemonstrate the coexistence of Eu³⁺ and Eu²⁺, confirming that partial self-reduction of Eu³⁺ to Eu²⁺ occurs within the Sr₄Al₁₄O₂₅ matrix. Lastly, the coexistence of Eu³⁺ and Eu²⁺ in the Sr₄Al₁₄O₂₅ crystal lattice,combined with its temperature-dependent luminescent properties, makesthis material a promising candidate for ratiometric temperature sensing.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2708–2726"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"InN Nanowires on Si⟨111⟩ and Si⟨100⟩ for Monolithic Short-Wave Infrared (SWIR) Photodetectors","authors":"Andrea Orlando-Cunnac,&nbsp;Arthur Arnaud,&nbsp;Martien Den Hertog,&nbsp;Ettore Coccato,&nbsp;Vincent Calvo,&nbsp;Jonathan Steckel,&nbsp;Eva Monroy","doi":"10.1021/acsaom.6c00319","DOIUrl":"https://doi.org/10.1021/acsaom.6c00319","url":null,"abstract":"<p>InN nanowires were grown on Si⟨111⟩ andSi⟨100⟩substrates by plasma-assisted molecular beam epitaxy using a thinAlN buffer layer at temperatures compatible with the thermal budgetlimitation imposed by back-end-of-line processing. Reflection high-energyelectron diffraction reveals differences in the AlN nucleation onthe two substrate orientations, with higher structural disorder inthe case of Si⟨100⟩. However, vertically aligned nanowireswith a hexagonal cross section and N polarity are obtained on bothsubstrates. A statistical analysis of nanowire morphology as a functionof growth temperature indicates similar trends (increasing diameterand length, and decreasing density with increasing temperature) onSi⟨111⟩ and Si⟨100⟩, which are explainedby adatom kinetics during growth. Nanowires on Si⟨100⟩exhibit improved uniformity and reduced tapering, attributed to thedifferent nanowire nucleation due to microstructural properties ofthe AlN buffer layer. The results demonstrate the feasibility of growinghigh-quality InN nanowires on Si⟨100⟩, supporting theirpotential for monolithic integration of nanowire-based photodetectorson silicon.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2531–2537"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermally Enhanced Luminescence in Dy3+-Doped Sc2Mo3O12 via 2D-Cell Contraction for pc-LEDs and Thermometric Applications","authors":"Satyam Chaturvedi,&nbsp;Tanika Chauhan,&nbsp;S. Masilla Moses Kennedy,&nbsp;Akhilesh Kumar Singh,&nbsp;Praveen Chandra Pandey","doi":"10.1021/acsaom.6c00311","DOIUrl":"https://doi.org/10.1021/acsaom.6c00311","url":null,"abstract":"<p>Rare-earth-based phosphors exhibit a decrease in thephotoluminescenceintensity with increasing temperature. However, to avoid thermal quenchingin emission, materials with negative thermal expansion are being explored.In this work, a series of Dy³⁺-doped Sc₂Mo₃O₁₂ phosphors have been synthesized via the urea-assistedautocombustion method. Thermal X-ray diffraction and Rietveld refinementhave shown 2-dimensional contraction in cell parameters. This contractionlowers the critical distance and volume, thereby enhancing the energytransfer from MoO₄^2– to Sc³⁺ and Dy³⁺ ions. A temperature-dependent (TD) photoluminescencestudy verifies this theory by showing thermally enhanced emissionspectra over 300–498 K for the synthesized phosphor. The areaunder these thermally enhanced curves has been used to calculate sensitivity.The best relative sensitivity of 1.63% K^–1 is achievedat 300 K. The sensor’s effectiveness is calculated. To meetthe requirements of lighting applications, the feasibility of thismaterial for high-color-rendering solid-state lighting systems wasalso explored. Thermometric properties of the synthesized phosphorsverify that Dy³⁺-doped Sc₂Mo₃O₁₂ is a promising phosphor for optical thermometry and canbe used as a phosphor-converted light-emitting diode (pc-LED), makingit a multifunctional material.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2577–2591"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Engineered Fluorescent Ionic Liquids with Tunable Cationic Architecture for Charge Delocalization-Driven Al3+ Recognition and Real-Sample Analysis","authors":"Swapan Patra,&nbsp;Suraj P. Pise,&nbsp;Nilanjan Dey","doi":"10.1021/acsaom.6c00300","DOIUrl":"https://doi.org/10.1021/acsaom.6c00300","url":null,"abstract":"<p>Fluorescentionic liquids (FILs) provide a versatile platform formetal ion sensing; however, the role of cationic structure in governingsensing efficiency remains underexplored. Herein, we report two 8-hydroxyquinoline-basedFIL probes incorporating imidazolium (compound 1) and pyridinium (compound2) frameworks for selective detection of Al³⁺ and Zn²⁺. Compound 1 exhibited significantly enhanced intramolecularcharge transfer (ICT), resulting in a ∼47-fold fluorescenceenhancement for Al³⁺ compared to ∼12-fold for compound2. UV–vis titration revealed the formation of a LMCT/ICT band(∼367 nm) with a distinct isosbestic point, confirming a well-definedcomplexation process. Computational analysis indicated a higher dipolemoment, improved charge delocalization, and favorable HOMO–LUMOalignment in compound 1, correlating with increased electronic softnessand stronger binding affinity. Mechanistically, Al³⁺ coordinationinduces structural rigidification, coordination-induced rigidificationand stabilization of the emissive ICT state and nonradiative decaypathways, and stabilizes the emissive ICT state, while fluoride-mediatedmasking enables selective discrimination over Zn²⁺. Theprobe exhibited high selectivity, reversibility, and a 1:2 bindingstoichiometry with enhanced fluorescence lifetime. Real sample analysisdemonstrated excellent linear response in soil extracts (R² = 0.993) through spiking experiments, and the method was successfullyextended for quantification of Al³⁺ in pharmaceutical formulations.Furthermore, a paper-based sensing device enabled rapid visual detectionwith smartphone-assisted quantification, highlighting its potentialfor low-cost, on-site Al³⁺ monitoring.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2562–2576"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evanescent Absorption Spectroscopy of Transition Metal Dichalcogenide Materials Using Guided Photoluminescence in Si3N4 Photonic Waveguides","authors":"Víctor Gonzalez-Morote,&nbsp;Marianna Sledzinska,&nbsp;Arkadiusz P. Gertych,&nbsp;Syed Hassan Abbas Jaffery,&nbsp;Mariusz Zdrojek,&nbsp;Daniel Navarro-Urrios","doi":"10.1021/acsaom.6c00415","DOIUrl":"https://doi.org/10.1021/acsaom.6c00415","url":null,"abstract":"<p>On-chip integration of two-dimensional transition metaldichalcogenides(TMDs) with photonic waveguides underpins a growing class of compactoptoelectronic and sensing devices, whose performance depends on theoptical absorption of the two-dimensional (2D) material in this integratedenvironment. We demonstrate a source-free, on-chip evanescent absorptionspectroscopy of MoS₂ and WS₂ flakes integratedon Si₃N₄ waveguides, in which the broadbanddefect-related photoluminescence of the Si₃N₄ core itself acts as the internal probe. Light generated inside thecore propagates under the TMD flake and is spectrally attenuated byevanescent interaction with the 2D material, and normalizing the transmittedspectrum to a reference waveguide without TMD yields the energy-dependentabsorption response without requiring an external broadband probe.The extracted guided absorption agrees with Raman and local micro-photoluminescencecharacterization and resolves differences between spatially uniformand non-uniform flakes. A complementary top-pumping scheme recoversguided WS₂ photoluminescence, whose spectral reshapingduring propagation is quantitatively reproduced by the measured absorption.This source-free platform qualifies 2D materials in their integratedphotonic environment and provides a direct route toward waveguide-integratedTMD photodetectors and sensors.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2765–2773"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lanthanide-Doped Transparent Glass-Ceramics: Enabling Compact Laser Sources through Nanostructure Engineering","authors":"Weiwei Chen,&nbsp;Xiongjian Huang,&nbsp;Shengda Ye,&nbsp;Junhao Xu,&nbsp;Guoping Dong","doi":"10.1021/acsaom.6c00460","DOIUrl":"https://doi.org/10.1021/acsaom.6c00460","url":null,"abstract":"<p>Lanthanide-doped transparent glass-ceramics (GCs) haveemergedas versatile gain media by combining the spectroscopic advantagesof crystalline hosts with the processing flexibility of amorphousglasses. Through controlled precipitation of nanoscale crystals, GCsprovide tailored local environments for lanthanide ions while maintainingoptical transparency and glass-based fabrication advantages, providingopportunities for compact and wavelength-tailored laser sources. ThisSpotlight on Applications reviews recent advances in lanthanide-dopedtransparent GCs for application-oriented laser technologies, withparticular emphasis on whispering-gallery-mode microcavity lasersand fiber lasers. By correlating fabrication strategies, microstructuralevolution, and optical performance, we highlight how nanocrystal engineeringregulates optical gain and enables laser operation across visible,near-infrared, and ∼2 μm spectral regions. The rolesof crystal size control, crystal-glass interface engineering, anddopant redistribution in balancing spectroscopic enhancement and opticallosses are further discussed. Remaining challenges in predictive crystallizationcontrol, low-loss device fabrication, and scalable integration aresummarized, together with future opportunities for developing compact,wavelength-diverse, and multifunctional photonic laser platforms.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2487–2502"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Confined Synthesis of Carbon Dots with Red Room-Temperature Phosphorescence and Dual-Modal Imaging","authors":"Runkai Sun,&nbsp;Jiancheng Liu,&nbsp;Chao Li,&nbsp;Wendi Liu,&nbsp;Cheng Cui,&nbsp;Yanjun Lin","doi":"10.1021/acsaom.6c00385","DOIUrl":"https://doi.org/10.1021/acsaom.6c00385","url":null,"abstract":"<p>Redafterglow-emitting nanomaterials are in great demand for bioimagingand advanced luminescent technologies and applications, but currentcandidates suffer from high fabrication costs, poor biocompatibility,and low luminescence efficiency. To address these challenges, aminoacid was intercalated into layered double hydroxides (LDHs) as a carbonsource, enabling the synthesis of a red-emitting room-temperaturephosphorescence (RTP) material (Mn@CDs-LDH) with Mn²⁺.This material exhibits phosphorescence centered at 660 nm with a phosphorescencequantum yield (PQY) of 2.28%. Structural and energy-level analysesreveal that the phosphorescence arises from the energy transfer processbetween carbon dots (CDs) and Mn²⁺ octahedra. Notably,LDH not only prevents the oxidation of Mn²⁺ but also facilitatesradiative transitions to enhance phosphorescence efficiency. Withdesirable optical properties and stability, Mn@CDs-LDH demonstratesapplication potential in multicolor displays and in vivo dual-modeimaging.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2727–2737"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultra-Long Organic Room-Temperature Phosphorescence from a Single-Water-Solvent Sodium Alginate Matrix","authors":"Shengwen Bao,&nbsp;Xiaodong Pu,&nbsp;Jianbiao Hu,&nbsp;Danfeng Ye,&nbsp;Yunhui Wan,&nbsp;Deli Sun,&nbsp;Ying Liu","doi":"10.1021/acsaom.6c00408","DOIUrl":"https://doi.org/10.1021/acsaom.6c00408","url":null,"abstract":"<p>To address the toxicity and solvent-dependent processingof conventionalroom-temperature phosphorescence (RTP) materials, coronene tetracarboxylate(CS)@SA biocomposites were fabricated by incorporating phosphorescent(CS) molecules into a sodium alginate (SA) matrix through a simpleaqueous doping strategy using water as the sole solvent. The hydrogen-bondingnetwork of SA stabilizes triplet excitons by restricting molecularmotion, while CS enhances intersystem crossing (ISC), enabling excitation-independentyellow-green afterglow lasting approximately 20 s under ambient conditions.The verified doping compatibility and single-water-solvent processabilitydemonstrate the potential of CS@SA for sustainable RTP applicationsin information encryption and display technologies.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2738–2745"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Study on the Luminescence Properties of Zero-Dimensional Organic–Inorganic Antimony Bromide Single Crystals and Glasses for Scintillators","authors":"Toranosuke Tsubokawa,&nbsp;Naoki Kawano,&nbsp;Yuuki Kitagawa,&nbsp;Kenji Shinozaki,&nbsp;Daisuke Nakauchi,&nbsp;Takumi Kato,&nbsp;Toshiaki Kunikata,&nbsp;Haruaki Ezawa,&nbsp;Keishi Yamabayashi,&nbsp;Shota Otake,&nbsp;Keita Miyajima,&nbsp;Ryosei Takahashi,&nbsp;Noriaki Kawaguchi,&nbsp;Takayuki Yanagida","doi":"10.1021/acsaom.6c00396","DOIUrl":"https://doi.org/10.1021/acsaom.6c00396","url":null,"abstract":"<p>Organic–inorganichybrid antimony bromide compounds witha zero-dimensional quantum nanostructure have gained research attentiontoward the development of scintillators. Herein, single crystals andglasses of the hybrid compounds were synthesized, and the luminescenceproperties were compared. Both the single crystals and glasses showedbroadband photoluminescence and scintillation from the [SbBr₅]^2– unit. Temperature-dependent photoluminescencespectra suggested that the origin of the broadband emission shouldbe self-trapped excitons (STE) in the inorganic part. Based on thesingle-crystal structure analysis and high-energy synchrotron X-raydiffraction measurements, glass formation preserved local coordinationwhile primarily disrupting intermediate- and long-range structuralordering. In addition to the broadened distribution of interunit distance,minor modifications of the surrounding environment of the [SbBr₅]^2– unit by glass formation influenced theSTE properties, leading to an enhanced photoluminescence quantum yield.Furthermore, the scintillation light yield (SLY) upon excitation byα-ray was measured, and the (amyltriphenylphosphonium)₂SbBr₅ glass showed a higher SLY than the single-crystalcounterpart.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"4 9","pages":"2687–2697"},"PeriodicalIF":3.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}