Optical Materials最新文献

{"title":"Fabrication of Ag/ZnO composite nanoflowers for ultrasensitive and recyclable SERS detection toward Rhodamine 6G","authors":"Yanfen Wang ,&nbsp;Pengfei Jia ,&nbsp;Jie Ai ,&nbsp;Gangzheng Liu ,&nbsp;Shuangshuang Liu ,&nbsp;Juan Gao ,&nbsp;Zhaoqi Sun","doi":"10.1016/j.optmat.2025.117485","DOIUrl":"10.1016/j.optmat.2025.117485","url":null,"abstract":"<div><div>Novel Ag/ZnO composite nanoflowers (CNFs) had been designed as a surface-enhanced Raman scattering (SERS) substrate for organic molecule detection. Flower-like ZnO architecture was firstly synthesized by a low-temperature precipitation method, and subsequently Ag nanoparticles were decorated on ZnO nanoflowers through a photochemical reaction. The optimal Ag component was investigated by changing the photo-reduction time of Ag⁺ in the ZnO precursor solution. It is found that the Ag nanoparticles with suitable size and crystallinity are significantly related to the light absorption and Raman signals for Ag/ZnO substrate. For Rhodamine 6G (R6G) as probe molecules, the optimal Ag/ZnO-40 min CNFs achieve a low detection limit of 1.0 × 10⁻¹² M and a high enhanced factor (EF) of 1.74 × 10⁶. Due to its excellent photocatalytic activity, the Ag/ZnO active substrate effectively degrades R6G molecules adsorbed on the surface, displaying an excellent self-cleaning property and stable recyclability. Such a superior SERS performance can be attributed to the synergy effect of two components (Ag nanoparticles and ZnO nanoflowers) such as its unique architecture, charge transfer and high-density hot spots.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117485"},"PeriodicalIF":4.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009990","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":"Thermally stimulated recombination processes in the YPO4:Bi system","authors":"I.N. Ogorodnikov,&nbsp;Yu.A. Kuznetsova,&nbsp;D.V. Raikov","doi":"10.1016/j.optmat.2025.117486","DOIUrl":"10.1016/j.optmat.2025.117486","url":null,"abstract":"<div><div>The 10-trap model for describing thermally stimulated recombination processes in the YPO₄:Bi system was developed. In addition to the six Bi-related centers, the model includes two shallow unidentified traps and two deep unidentified traps. The model was parameterized (FOM = 5.5 %) using previous experimental data on spectrally selective thermoluminescence (TL) recorded monitoring emission at 3.6 and 5.1 eV. For each trap, the best-fit parameters were obtained: activation energy, frequency factor, trapping and recombination factors; signs of delocalizing charge carriers. The origin of the observed TL glow peaks and the main channels of recombination processes leading to luminescence at 3.6 and 5.1 eV were revealed. The parameterized model was applied to the analysis of the origin of long-lasting afterglow in the YPO₄:Bi system. It was found that at room temperature the first relatively fast component of the afterglow decay kinetics is caused by detrapping charge carriers from shallow traps, manifesting itself as a TL glow peak closest to room temperature: trapped electron center with TL glow peak maximum at about 340 K, which is caused predominantly by electron recombination luminescence; the temperature dependence of the fast component of the afterglow decay kinetics was studied and the origin of the apparent wide TL glow peaks III, revealed earlier by processing the experimental data on YPO₄:Bi, was established. The origin of the second slow component of the afterglow decay kinetics is attributed to processes beyond the scope of this model; only the final stages of the recombination processes that cause the slow afterglow component are discussed.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117486"},"PeriodicalIF":4.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009989","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":"Selective optical excitation of high and low-frequency oscillation modes in NiO using double pump optical pulses","authors":"Yuwen Li,&nbsp;Yifei Dai,&nbsp;Yan Liu","doi":"10.1016/j.optmat.2025.117383","DOIUrl":"10.1016/j.optmat.2025.117383","url":null,"abstract":"<div><div>Antiferromagnetic materials have the potential to enable high-speed processing in spintronic devices within the terahertz range owing to their ultrafast spin dynamics. NiO has attracted significant attention due to its Néel temperature being above room temperature in recent years. However, separating its two resonance modes remains a critical challenge, which is expected to be achieved by optical excitation. Micromagnetic simulations reveal that selective excitation of NiO resonance modes can be controlled via the polarization and time interval of the double pump optical pulse. The two oscillation modes can be probed by measuring the charge current components along different NiO/Pt heterostructure axes with the inverse spin Hall effect. This work unravels the physical conditions for the excitation of individual resonance modes in NiO, laying the foundation for the development of ultrafast opto-spintronic devices based on antiferromagnetic materials.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117383"},"PeriodicalIF":4.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026900","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 multi-colorimetric sensor based on silver triangular nanoplates for rapid and sensitive vitamin C detection","authors":"Indah Nursyamsi Handayani ,&nbsp;Nursama Heru Apriantoro ,&nbsp;Amanda Aurelia ,&nbsp;Muhammad Rizki Nugroho ,&nbsp;Yudhistira Tirtayasri Amrillah ,&nbsp;Ferry Anggoro Ardy Nugroho ,&nbsp;Adhi Harmoko Saputro ,&nbsp;Vivi Fauzia","doi":"10.1016/j.optmat.2025.117487","DOIUrl":"10.1016/j.optmat.2025.117487","url":null,"abstract":"<div><div>Colorimetric sensors have emerged as promising alternatives for vitamin C detection due to their simplicity, speed, and ease of use. However, conventional single-color indicators often suffer from limited sensitivity and are challenging for naked-eye detection. This study presents a simple, rapid, and reliable multi-colorimetric method for vitamin C detection using silver triangular nanoplates (AgTNPs) as the sensing platform. By investigating the effect of varying potassium chloride (KCl) concentrations (2, 4, 8, and 10 mM), the results reveal that an optimal KCl concentration of 8 mM significantly enhances the sensor's performance. The enhanced sensor achieved a high sensitivity of 4.57 nm/μM ± 0.35 nm/μM with a correlation coefficient of 96 %, and lowest LOD was 0.52 μM enabling accurate quantification of vitamin C across a concentration range of 0–40 μM. Furthermore, the sensor demonstrated an ultra-fast response time (as low as 27 s), making it suitable for real-time applications. To further improve usability, a novel visual detection approach using Euclidean distance (<span><math><mrow><mi>d</mi></mrow></math></span>) analysis was introduced, facilitating direct visual observation of vitamin C concentrations. The sensor achieved Euclidean distance values exceeding 0.020 units for vitamin C concentrations above 20 μM, providing a clear and distinguishable color change visible to the naked eye. These findings establish the enhanced AgTNP-based colorimetric sensor as a highly effective tool for vitamin C detection in food samples, offering a practical solution for quality control and nutritional analysis.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117487"},"PeriodicalIF":4.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009988","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":"Optimization of synthesis techniques and characterization of AgBr0.7I0.3 – TlBr0.46I0.54 optical ceramics and single crystals","authors":"Alexander Lvov,&nbsp;Anastasia Yuzhakova,&nbsp;Vladislav Kostrov,&nbsp;Polina Pestereva,&nbsp;Sofya Barykina,&nbsp;Aleksey Ishchenko,&nbsp;Dmitrii Salimgareev,&nbsp;Liya Zhukova","doi":"10.1016/j.optmat.2025.117479","DOIUrl":"10.1016/j.optmat.2025.117479","url":null,"abstract":"<div><div>Single crystals and optical ceramics based on the AgBr_0.7I_0.3 – TlBr_0.46I_0.54 system exhibit not only high optical transparency but also promising luminescent properties. To synthesize these materials, a comprehensive study of their physicochemical transformations, synthesis technology, and optical properties was conducted. Phase diagram analysis revealed the possibility of growing single crystals with compositions of 0–3 mol. % and 94–100 mol. % AgBr_0.7I_0.3 in TlBr_0.46I_0.54, while ceramic synthesis was feasible in the range of 3–11 mol. % and 72–94 mol. % AgBr_0.7I_0.3 in TlBr_0.46I_0.54. The optimal synthesis conditions were determined and verified using XRD and SEM analyses. By optimizing acid concentrations and compositions, high-purity raw materials were obtained, enabling the successful synthesis of a series of single crystals and ceramics. The resulting materials demonstrated a broad transmission range (0.44–41.7 μm) without absorption bands, along with high transparency. All samples exhibited luminescence in the visible to near-IR range. The most intense emission was observed in ceramic samples lightly doped with 3 mol. % and 7 mol. % AgBr_0.7I_0.3 in TlBr_0.46I_0.54, corresponding to the rhombic phase. The developed materials show potential for applications as optical and luminescent solids.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117479"},"PeriodicalIF":4.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018663","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":"Controlled growth of single-crystal ZnS nanoparticles with preferential (111) orientation: Low dislocation density and its impact on luminescence properties","authors":"Debojyoti Nath ,&nbsp;Sanghita Basak ,&nbsp;Ratan Das","doi":"10.1016/j.optmat.2025.117481","DOIUrl":"10.1016/j.optmat.2025.117481","url":null,"abstract":"<div><div>Here, single-crystal ZnS semiconductor nanoparticles were synthesized via a wet chemical method, exhibiting a spherical morphology with an average size of 26 nm. XRD profile revealed diffraction peaks along the (111), (220), and (311) planes, with an exceptionally strong intensity along (111). The texture coefficient confirmed a preferential orientation along this plane. Microstructural analysis based on XRD data revealed lower strain and dislocation density compared to previously reported works, strongly suggesting that the lower defect density in (111) preferentially oriented ZnS compared with other polycrystalline ZnS structures. Finally, the influence of the (111) preferential orientation on the emission properties of ZnS was examined through photoluminescence (PL) spectroscopy. The PL spectra show a lower intensity of the blue emission peak at 416 nm, further suggesting that ZnS semiconductor nanoparticles with a (111) preferential orientation have fewer defects and vacancies.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117481"},"PeriodicalIF":4.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009985","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":"Structural, luminescent properties and Sm3+ → Sm2+ reduction in H2 gas atmosphere of Tb3+/Sm3+ co-activated lithium sodium borate glasses","authors":"Nguyen Thi Thai An ,&nbsp;Ho Van Tuyen ,&nbsp;Tran Thi Hong ,&nbsp;Trinh Ngoc Dat ,&nbsp;Phan Tien Dung ,&nbsp;Phan Van Do","doi":"10.1016/j.optmat.2025.117445","DOIUrl":"10.1016/j.optmat.2025.117445","url":null,"abstract":"&lt;div&gt;&lt;div&gt;This work presents the impact of lithium sodium borate (BLN) glasses with the molar composition &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;69&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;25&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;B&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;O&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mn&gt;15&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;Li&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;O&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mn&gt;15&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;Na&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;O&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;75&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;Tb&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;O&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;Sm&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;O&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;75&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;25&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, and 1.75 mol%) on the structure and optical properties. The amorphous nature of the fabricated glasses was confirmed by XRD patterns and SEM images. The glass samples reached a density from 2.38 to 2.61 g/cm&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; and their molar volumes decreased from 27.20 to 26.67 cm&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;/mol with the increase of the Sm&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;O&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; concentrations. FTIR and Raman spectra analysis confirmed the main vibrations located around 600, 1300, and 1600 cm&lt;sup&gt;−1&lt;/sup&gt; assigned to the bending vibration B-O-B bridges, asymmetric stretching of BO&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;, and B–O&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; stretching, respectively. Analysis of photoluminescence (PL) spectra indicated that Tb&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; shows emission from both &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;D&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;D&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; excited levels, and Sm&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; emits three bands at 563, 600, and 646 nm corresponding to the &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;G&lt;span&gt;&lt;math&gt;","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117445"},"PeriodicalIF":4.2,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009986","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":"All-fiber polarization modulation using Bi2O2S/PVA thin film as modulator","authors":"Xiaoyou Song ,&nbsp;Yun Ye ,&nbsp;Zian Cheak Tiu ,&nbsp;Lili Tao ,&nbsp;Hoong Pin Lee ,&nbsp;Sulaiman Wadi Harun","doi":"10.1016/j.optmat.2025.117468","DOIUrl":"10.1016/j.optmat.2025.117468","url":null,"abstract":"<div><div>In this work, we experimentally demonstrated all-fiber photon-to-photon polarization modulation using Bi<strong>₂</strong>O<strong>₂</strong>S thin film as a modulator. A CW pump laser functions as a controller to heat the Bi<strong>₂</strong>O<strong>₂</strong>S thin film and induce a thermo-optic effect. The polarization state of the signal light rotated linearly as the refractive index of Bi<strong>₂</strong>O<strong>₂</strong>S thin film changed with the increase of the pump. As the pump power increased from 0 mW to 420 mW, the azimuth angle of the signal light rotated linearly from 0° to 40.35°. The performance of the proposed polarization modulator is highly linear, with the R² of 0.986 and a sensitivity of 0.1024°/mW. This work demonstrated a simple and practical method to control the polarization state of light, which exhibits great potential to solve the polarization impairment issue in optical communication systems and lays a foundation for industrial growth in all-optical systems.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117468"},"PeriodicalIF":4.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988616","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":"Antireflective-to-mirror-like all-solid-state electrochromic devices","authors":"Martin Crouan,&nbsp;Bill Baloukas,&nbsp;Oleg Zabeida,&nbsp;Jolanta-Ewa Klemberg-Sapieha,&nbsp;Ludvik Martinu","doi":"10.1016/j.optmat.2025.117464","DOIUrl":"10.1016/j.optmat.2025.117464","url":null,"abstract":"<div><div>Inorganic electrochromic (EC) materials, capable of transitioning between bleached and colored states under an applied current, hold significant potential for smart windows and eyewear industries. These materials can be integrated into all-solid-state devices (ASSDs) consisting of two electrodes, with tungsten trioxide (WO₃) and nickel oxide (NiO) as complementary EC layers, separated by an ion conductor. While standard architectures enable significant transmission and absorption modulation, their ability to achieve a substantial reflection increase upon coloration remains limited, which can be of interest for enhanced aesthetics and improved user comfort. To address this limitation, an EC Bragg mirror composed of alternating layers of WO₃ and indium tin oxide (ITO) was implemented to replace the single WO₃ layer in the standard architecture. This improved design enabled enhanced ASSD reflection modulation, effectively transitioning from an antireflective to a mirror-like state by reaching a 7.6 % increase in reflection. Simplifying the ASSD structure by omitting the antireflective constraints, the devices were able to reach an even greater reflection modulation of up to 17.9 %. A modeling approach based on transfer matrix calculations was employed to predict the optical behavior of the fabricated ASSDs in both their bleached and colored states. Despite some discrepancies in the spectral fitting, the presence of a distinct peak confirmed the effectiveness of Bragg mirror-integrated EC devices. Finally, durability testing revealed that the cycling stability of the enhanced devices strongly depends on the applied electrode potentials, highlighting their critical role in maintaining performance over time.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117464"},"PeriodicalIF":4.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009984","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":"UV-guided enhanced green luminescence in Y2O3/ZnO:Tb3+ composite via induced defect state and applied for latent fingerprinting application","authors":"Prince Kumar ,&nbsp;P.K. Vishwakarma ,&nbsp;S.B. Rai ,&nbsp;A. Bahadur","doi":"10.1016/j.optmat.2025.117466","DOIUrl":"10.1016/j.optmat.2025.117466","url":null,"abstract":"<div><div>The Y₂O₃/ZnO:Tb³⁺ composite was synthesized through the solid-state reaction method. XRD analysis confirms the phase formation corresponding to JCPDS #36–1451 (ZnO) and #43–1036 (α-Y₂O₃), revealing nano order crystallinity, negative strain, and 76:24 % occupancy of Y₂O₃/ZnO. The submicron-sized particles subsequently increased upon Tb³⁺ doping as shown in FE-SEM images. Elemental mapping and XPS analyses confirm the composition, oxidation state, and presence of oxygen vacancies. The DRS spectra show that the band gaps of Y₂O₃ &amp; ZnO are 5.28 eV and 3.27 eV, respectively. An intense green emission at 520 nm due to ZnO defect states and at 543 nm due to ⁵D₄→⁷F₅ transition was observed under λ_Ex = 378 and 305 nm, respectively. Interestingly, ZnO emits a broad band from 385 to 700 nm region through 378 or 340 nm excitations. The Tb³⁺ ion-induced tunability due to modification in defects, is well supported by decay analysis. The intense green and whitish green emission of Tb³⁺ ion and composite has been successfully applied in latent fingerprint detection.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"168 ","pages":"Article 117466"},"PeriodicalIF":4.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010122","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}