Optical Materials最新文献

{"title":"Space-charge waves due to hole-electron competition in a photorefractive material","authors":"Ivan de Oliveira ,&nbsp;Varese Salvador Timóteo","doi":"10.1016/j.optmat.2025.117152","DOIUrl":"10.1016/j.optmat.2025.117152","url":null,"abstract":"<div><div>We report on space-charge waves due to the hole-electron competition in an undoped Bi₁₂TiO₂₀ photorefractive crystal generated during holographic recording with a laser light of 532 nm wavelength and the reflection geometry. A nonlinear relation between the angular velocity of the resonant space-charge waves and the light intensity, as well as the photovoltaic effect, is demonstrated. The experimental data is in good agreement with the theoretical model, thus supporting the mathematical model reported here.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117152"},"PeriodicalIF":3.8,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178607","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":"Photorefractive properties of double-doped Sn2P2S6 ferroelectrics","authors":"V.Yu. Voloshyn,&nbsp;K.E. Glukhov,&nbsp;M.V. Tsyhyka,&nbsp;A.A. Kohutych,&nbsp;A.A. Grabar","doi":"10.1016/j.optmat.2025.117151","DOIUrl":"10.1016/j.optmat.2025.117151","url":null,"abstract":"<div><div>The photorefractive parameters of Sn<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>P<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>S<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span> (SPS) crystals doped with a combination of Cu and Sb are investigated. It is shown that this composition exhibits improved photorefractive properties, primarily a sufficiently high coefficient of two-wave mixing along with high stability of the photorefractive grating, in contrast to the case of a sample doped with Sb. The advantage of the modified crystals is demonstrated in the scheme of a dynamic interferometer.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117151"},"PeriodicalIF":3.8,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203514","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":"High-mobility and low-roughness IGZO thin films deposited by ion beam deposition","authors":"Zhaoyang Chen ,&nbsp;Jiacheng Wang ,&nbsp;Yongkang Cao ,&nbsp;Zichao Li ,&nbsp;Kaidong Xu ,&nbsp;Shiwei Zhuang","doi":"10.1016/j.optmat.2025.117214","DOIUrl":"10.1016/j.optmat.2025.117214","url":null,"abstract":"<div><div>With the rising demand for high-performance materials in modern electronics, IGZO thin films show great potential in flat panel displays, flexible displays, and next-generation memory applications due to their excellent carrier mobility, optical transparency, and low power consumption. High carrier mobility ensures fast device response and reduced power consumption, while low surface roughness enhances optoelectronic performance and device stability. Fabricating IGZO thin films with high mobility, low roughness, and understanding how plasma energy influences these properties are crucial for advancing electronic devices. This study explores the fabrication of IGZO thin films using ion beam deposition under both oxygen-rich and non-oxygen environments, systematically analyzing how plasma energy affects their optical, electrical, and surface characteristics. The results revealed distinct trends under the two different environments. In the absence of oxygen, films exhibited higher carrier concentration and Hall mobility, but showed reduced visible light transmittance, attributed to In atom precipitation caused by increased plasma energy. In contrast, under oxygen-rich conditions, the films displayed lower carrier concentration and mobility, but maintained optical transmittance above 78 %, primarily regulated by changes in oxygen vacancy concentrations. Additionally, films fabricated under oxygen conditions achieved surface roughness on the angstrom scale. These findings highlight the precision of ion beam deposition in controlling the properties of IGZO thin films. By optimizing deposition parameters, it is possible to tailor these films to either maximize mobility or minimize roughness, offering valuable insights and technical guidance for the design of advanced electronic materials.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117214"},"PeriodicalIF":3.8,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178606","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":"High-efficiency and high-tolerance fiber-to-chip edge coupler based on tilted periodically segmented waveguides","authors":"Pan Pan ,&nbsp;Zhonghua Jia ,&nbsp;Zhihao Zhang ,&nbsp;Shenlong Zha ,&nbsp;Xuanbin Qiu ,&nbsp;Hongliang Ma ,&nbsp;Qilei Zhang ,&nbsp;Lihua Zhang ,&nbsp;Lingli Li ,&nbsp;Chuanliang Li","doi":"10.1016/j.optmat.2025.117159","DOIUrl":"10.1016/j.optmat.2025.117159","url":null,"abstract":"<div><div>Silica planar lightwave circuit (PLC) chips are widely used in quantum key distribution, optical sensing, and other precision photonic systems. Since silica is not a light-emitting material, fiber-to-chip coupling loss is a critical factor affecting chip performance. In this paper, a tilted periodically segmented waveguide (PSW) fiber-to-chip edge coupler is designed and fabricated on a PLC platform to minimize coupling loss and enhance misalignment tolerance. Within the 1200–1800 nm wavelength range, simulation results indicate that the coupling losses of the tilted PSW coupler remain below 0.26 dB (<span><math><msub><mrow><mi>TE</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> mode) and 0.25 dB (<span><math><msub><mrow><mi>TM</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> mode), demonstrating excellent polarization insensitivity. Furthermore, due to the mode field expansion effect of the PSW structure, the coupling misalignment tolerance is significantly improved. When the horizontal and vertical offsets reach <span><math><mo>±</mo></math></span> <span><math><mrow><mn>2</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>, the coupling losses increase by only 0.03 dB and 0.14 dB, respectively. The designed chip was fabricated in the laboratory, and the experimental results within the 1530–1600 nm wavelength range reveal that the <span><math><msub><mrow><mi>TE</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> mode coupling loss ranges from 0.18 dB to 0.52 dB, while the <span><math><msub><mrow><mi>TM</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> mode coupling loss varies from 0.40 dB to 0.59 dB. Multiple tests on different chips show that the coupling losses consistently remain below 0.58 dB at 1550 nm wavelength. These results confirm that the proposed tilted PSW coupler offers a highly efficient and robust solution for fiber-to-chip coupling in photonic integrated circuits (PICs).</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117159"},"PeriodicalIF":3.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144166455","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":"Methylammonium bismuth bromide perovskite single crystal growth and its application as saturable absorber for mode-locked fiber laser","authors":"M. Mansor ,&nbsp;N.H. Zainol Abidin ,&nbsp;J.Y.C. Liew ,&nbsp;A.R. Md Zain ,&nbsp;M.T. Alresheedi ,&nbsp;E.K. Ng ,&nbsp;M.A. Mahdi","doi":"10.1016/j.optmat.2025.117212","DOIUrl":"10.1016/j.optmat.2025.117212","url":null,"abstract":"<div><div>This study investigates the morphology, structure and optical properties of methylammonium bismuth bromide, MA₃Bi₂Br₉ (MBB) perovskite single crystals grown via slow evaporation method with different molar ratios of methylammonium bromide to bismuth bromide (3:1, 3:2, 3:3 and 3:4). Comparative analysis of the crystals produced under the different molar ratios revealed distinct differences in crystal morphology. The structural characterization confirmed the perovskite phase formation and exhibited favorable optical properties for saturable absorption. The MBB saturable absorber demonstrated a modulation depth of 9.75% and when employed in an erbium-doped fiber laser, it was able to generate mode-locked pulses with an average duration of 942.8 fs. The generated pulses were stable even when operated at high humidity for long periods. These results showcase the potential of MBB perovskite crystals as effective saturable absorbers for ultrashort pulses generation in fiber lasers and for other potential optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117212"},"PeriodicalIF":3.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203688","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 SERS sensing of nitrite via Al-coated porous, pre-etched, and activated silicon hybrid structures","authors":"Intisar A. Naseef ,&nbsp;Layla A. Wali ,&nbsp;Mehdi Q. Zayer ,&nbsp;Alwan M. Alwan","doi":"10.1016/j.optmat.2025.117211","DOIUrl":"10.1016/j.optmat.2025.117211","url":null,"abstract":"<div><div>In this study, the creation of novel pathways was examined for three different silicon (Si) surface configurations (Al/Si hybrid structures) including Porous Si (PSi), pre-etched Si, and activated Si, coated with a thin layer of aluminum nanoparticles (AlNPs) using immersion plating as the deposition technique. These three Al/Si hybrid structures have been tested as SERS chemical sensors by detecting sodium nitrite compound (NaNO₂) at a low concentration level of (5 × 10<strong>⁻</strong>⁶) M. The morphology, deposition levels, and SERS sensing performance of the hybrid structures were characterized by: Field Emission Scanning Electron Microscopy (FESEM), Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectroscopy (SEM-EDS) elemental mapping, X-ray diffraction (XRD), photoluminescence (PL), and Raman measurements. The Al/Si hybrid structures showed a significant response to the deposition process with different AlNP sizes and uniform distributions due to the unique morphology nature of each structure. Moreover, these substrates proved to be reliable and efficient SERS sensors with enhancement factor (EF) values of (6.91 × 10⁷, 7.01 × 10⁹, and 6.27 × 10⁷) for the PSi, pre-etched Si, and activated Si samples respectively. The pre-etched Si showed the highest enhancement factor value which represents an indicator that the pre-etched samples are the best SERS sensors resulted in this work. It was demonstrated that the immersion plating method provides an easy and less time-consuming approach with high passivation and uniform distribution of AlNPs on the surface of the three prepared silicon substrates.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117211"},"PeriodicalIF":3.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144166454","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":"Oxygen vacancies generation in Ceria via Eu(III)-doping for accelerated charge separation UV-driven photodegradation of hazardous Rose Bengal dye","authors":"Vasundhara Madaan ,&nbsp;Vinita Bhankar ,&nbsp;Permender Singh ,&nbsp;Brij Mohan ,&nbsp;Krishan Kumar","doi":"10.1016/j.optmat.2025.117213","DOIUrl":"10.1016/j.optmat.2025.117213","url":null,"abstract":"<div><div>Wastewater treatment plays a crucial role in enhancing the water quality and diminishing diseases caused by excessive discharge of organic dyes from various textile industries. Synthesizing efficient photocatalysts and enhancing its properties to degrade dyes has attracted attention globally. Herein, we are reporting the synthesis of europium-doped cerium oxide via sol-gel technique for photocatalytic degradation of Rose Bengal (RB) dye and its ferromagnetic behaviour. The introduction of europium enhanced its photocatalytic behaviour by facilitating hydroxyl radical generation. Moreover, 8 % Eu³⁺-doped CeO₂ (CeEu8) shows highest RTFM and can degrade RB dye under UV irradiation with an efficiency of 96.02 % which attributes to fast electron transfer, large surface area and better electron-hole separation. Present work provides an approach for the synthesis of an efficient photocatalyst for textile dye degradation and establishing an environment friendly catalytic system.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117213"},"PeriodicalIF":3.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203508","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":"Corrigendum to: “TeO2–BaO–Bi2O3 tellurite optical glasses I. - Glass formation, structural, thermal and optical properties,” [Opt. Mater. 157 (2024) 116331]","authors":"J. Hrabovsky ,&nbsp;R. Svoboda ,&nbsp;B. Frumarova ,&nbsp;L. Benes ,&nbsp;S. Slang ,&nbsp;V. Dedic","doi":"10.1016/j.optmat.2025.117166","DOIUrl":"10.1016/j.optmat.2025.117166","url":null,"abstract":"","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117166"},"PeriodicalIF":3.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280373","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":"Synergistic incorporation of MoS2 cocatalyst into ZnIn2S4 nanoflower architectures for efficient photocatalytic H2 production and selective benzyl alcohol oxidation","authors":"Xue Men ,&nbsp;Haiou Liang ,&nbsp;Xiaoye Fan ,&nbsp;Jie Bai","doi":"10.1016/j.optmat.2025.117208","DOIUrl":"10.1016/j.optmat.2025.117208","url":null,"abstract":"<div><div>Construction of efficient catalysts for photocatalytic hydrogen evolution and selective oxidation of coupled organics is an effective way to obtain clean, renewable fuels and high-value chemicals using photogenerated electrons and holes. Here, we successfully introduced the co-catalyst MoS₂ into the ZnIn₂S₄ nanoflower sphere matrix, which can effectively separate electrons and holes, suppress electron-hole recombination, and realize the synergistic coupling of photocatalytic H₂ evolution and selective oxidation of benzyl alcohol. By tuning the MoS₂ loading, we optimized the active site density and charge transfer efficiency of the ZnIn₂S₄ catalyst, thereby enhancing its H₂ evolution performance. It was also found that ZnIn₂S₄ exhibited the highest catalytic activity in the benzyl alcohol oxidation reaction with the addition of 3 wt% MoS₂ and achieved the oxidation of benzyl alcohol to benzaldehyde. In addition, we investigated the effects of different sacrificial reagents on the catalytic performance, and the results further verified the universality and feasibility of the catalytic system. Notably, the catalyst demonstrated excellent photocatalytic degradation performance, achieving removal efficiencies of 98 %, 77 %, 76 %, and 70 % for rhodamine B (RhB), tetracycline (TC), oxytetracycline (OTC), and chlortetracycline (CTC), respectively. This work elucidates the critical role of MoS₂ as a cocatalyst in enhancing charge separation and surface reaction kinetics, providing a viable strategy for designing dual-functional photocatalysts for simultaneous H₂ evolution and organic transformations.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117208"},"PeriodicalIF":3.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146720","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":"Methyl cellulose/amorphous TiO2 biodegradable UV-protective films: An investigation into the impact of annealing on their optical properties","authors":"Fatemah H. Alkallas ,&nbsp;Amira Ben Gouider Trabelsi ,&nbsp;Abdullah F. Al Naim ,&nbsp;Ashraf H. Farha ,&nbsp;Shehab A. Mansour","doi":"10.1016/j.optmat.2025.117203","DOIUrl":"10.1016/j.optmat.2025.117203","url":null,"abstract":"<div><div>Biodegradable polymers, especially cellulose derivatives, are gaining recognition as sustainable options in multiple sectors. Methylcellulose (MC) stands out as a significant cellulose derivative, particularly when integrated with amorphous (a-TiO₂) nanoparticles, which shows potential for the creation of UV-protective films. The MC/a-TiO₂ nanocomposites were synthesized at a weight ratio of 0.05 %, exhibiting uniformity and transparency following annealing at 180 °C. The X-ray diffraction (XRD) analysis of MC and a-TiO₂ nanoparticles reveals important structural characteristics. MC displays broad peaks that suggest a semi-crystalline structure, with a prominent Van der Waals halo around 20.5°, influencing its solubility in water. In contrast, amorphous TiO₂ shows a smooth hump between 18° and 35°, with a peak at 25.8° that corresponds to TiO₂ anatase. High-resolution transmission electron microscopy (HRTEM) further validates the amorphous characteristics of the synthesized TiO₂ nanoparticles. Field emission scanning electron microscopy (FE-SEM) images of the MC/a-TiO₂ nanocomposites reveal effective nanoparticle dispersion and a reduction in particle size in certain samples, indicating a transition from amorphous to crystalline TiO₂. Thermogravimetric analysis (TGA) indicates that the incorporation of a-TiO₂ nanoparticles influences the thermal degradation, thereby enhancing thermal stability. Optical characterization of the films demonstrates a decrease in the transmittance and a shift in their absorption edges with an increase of a-TiO₂ content. To evaluate the sun protection factor (SPF) of the MC/a-TiO₂ nanocomposite films, SPF values were derived from spectrophotometric data. The SPF values illustrate the efficiency of TiO₂ in enhancing UV protection, ranging from 4.05 to 24.37. Collectively, these results highlight the promising attributes of MC/a-TiO₂ nanocomposites for a variety of applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"166 ","pages":"Article 117203"},"PeriodicalIF":3.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144166415","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}