Optical Materials最新文献_第2页

Spectroscopic study and visible luminescence of Tb3+ ions in CaF2 crystal co-activated with Yb3+

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-23 DOI: 10.1016/j.optmat.2024.116481

Anastasiya V. Nekhoroshikh, Vasily A. Konyushkin, Petr G. Zverev

{"title":"Spectroscopic study and visible luminescence of Tb3+ ions in CaF2 crystal co-activated with Yb3+","authors":"Anastasiya V. Nekhoroshikh, Vasily A. Konyushkin, Petr G. Zverev","doi":"10.1016/j.optmat.2024.116481","DOIUrl":"10.1016/j.optmat.2024.116481","url":null,"abstract":"<div><div>High quality crystals with composition of Ca<sub>0.95</sub>Tb<sub>0.05</sub>F<sub>2.05</sub> and Ca<sub>0.85</sub>Tb<sub>0.05</sub>Yb<sub>0.1</sub>F<sub>2.15</sub> were grown by Bridgman-Stockbarger technique. Yb<sup>3+</sup> ions were used as a sensitizer for Tb<sup>3+</sup> ions. Optical properties were measured, including the absorption spectrum, emission spectrum, and fluorescence decay curves. Judd-Ofelt theory was used to analyze the spectroscopic parameters. Fluorescence branch ratio, transition probability, radiative and fluorescence lifetimes, and quantum efficiency were determined. The emission cross section of Tb<sup>3+</sup> ions in Tb:CaF<sub>2</sub> and Tb/Yb:CaF<sub>2</sub> crystals for the green emission at 544 nm, corresponding to the transitions of <sup>5</sup>D<sub>4</sub>→<sup>7</sup>F<sub>5</sub> were calculated to be 4.61 × 10<sup>−22</sup> cm<sup>2</sup> and 4.60 × 10<sup>−22</sup> cm<sup>2</sup>, respectively. Our experiments have shown that doping with Yb<sup>3+</sup> ions does not significantly affect the spectral properties of Tb<sup>3+</sup> ions in CaF<sub>2</sub> crystal. Quadratic dependence of the emission intensity of Tb<sup>3+</sup> ion in Tb/Yb:CaF<sub>2</sub> crystal on the intensity of a diode laser at 955 nm proved that the excitation of Tb<sup>3+</sup> ion occurs due to the cooperative process of transferring the excitation from two Yb<sup>3+</sup> ions to one neighboring Tb<sup>3+</sup> ion. The Tb/Yb:CaF<sub>2</sub> crystal can be considered as a promising up-converting medium for creating diode-pumped visible phosphorus and active laser media.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116481"},"PeriodicalIF":3.8,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748119","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}

引用次数: 0

Optimization of growth conditions for direct synthesis of SnSe2 thin films via improved atmospheric pressure chemical vapor deposition 优化通过改进型常压化学气相沉积直接合成 SnSe2 薄膜的生长条件

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-23 DOI: 10.1016/j.optmat.2024.116467

Baoqi Wu , Zhihao Wang , Zhanshou Wang , Jianyuan Yu , Hongli Zhao

{"title":"Optimization of growth conditions for direct synthesis of SnSe2 thin films via improved atmospheric pressure chemical vapor deposition","authors":"Baoqi Wu , Zhihao Wang , Zhanshou Wang , Jianyuan Yu , Hongli Zhao","doi":"10.1016/j.optmat.2024.116467","DOIUrl":"10.1016/j.optmat.2024.116467","url":null,"abstract":"<div><div>In this study, high-quality tin diselenide (SnSe<sub>2</sub>) thin films were successfully synthesized using an optimized atmospheric pressure chemical vapor deposition (APCVD) technique. Precise control over key growth parameters, such as substrate temperature and deposition time, enabled the realization of films exhibiting exceptional crystallographic and optical properties. Notably, the growth temperature was found to significantly influence the SnSe<sub>2</sub> film morphology. Under the optimal conditions (250 °C growth temperature and 90 min of deposition), the films exhibited a strong (001) crystal orientation, 24.6 % transmittance, an optical bandgap of 1.55 eV, and an optical thickness of approximately 386.19 nm. Additionally, the films demonstrated N-type semiconductor behavior, making them highly suitable for use in electronic and optoelectronic applications. This study provides valuable insights for the large-scale production of high-performance SnSe<sub>2</sub> thin films suitable for electronic and optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116467"},"PeriodicalIF":3.8,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723749","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}

引用次数: 0

Effect of amino and amido group on fluorescent, viscosity sensitive, thermally stable, NLOphoric thiophene fused acenaphthene derivatives 氨基和酰胺基对荧光、粘度敏感、热稳定性和 NLO 发光的噻吩融合苊衍生物的影响

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-23 DOI: 10.1016/j.optmat.2024.116490

Zeba Khan, Nagaiyan Sekar

引用次数: 0

Photocatalytic performance and solar cell simulations of TiO2–SnO2:F mixed oxide thin films grown by spray pyrolysis method

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-23 DOI: 10.1016/j.optmat.2024.116491

Wafa Naffouti, Najoua Kamoun-Turki

{"title":"Photocatalytic performance and solar cell simulations of TiO2–SnO2:F mixed oxide thin films grown by spray pyrolysis method","authors":"Wafa Naffouti, Najoua Kamoun-Turki","doi":"10.1016/j.optmat.2024.116491","DOIUrl":"10.1016/j.optmat.2024.116491","url":null,"abstract":"<div><div>Mixed oxide titanium dioxide (TiO<sub>2</sub>) and fluorine doped tin oxide (SnO<sub>2</sub>:F) thin films have been grown, using spray pyrolysis technique, at various substrate temperatures (Ts) ranging from 250 to 400 °C with a step of 50 °C. Samples were examined using X-ray diffraction (XRD), optical microscopy, spectrophotometry and spectrofluorimetry, with special emphasis on the evolution of their physico-chemical properties versus substrate temperature. In fact, X-ray diffraction analysis showed that a substrate temperature of about 350 °C exhibits the presence of both anatase phase of TiO<sub>2</sub> and tetragonal structure of SnO<sub>2</sub>:F compounds. A direct band gap of about 3.91 eV was obtained. Envelope method, based on transmission spectrum, was investigated in order to estimate the film thickness and some optical parameters such as real and imaginary parts of dielectric constant. Wemple Di-Dominico and Spizer Fan models were applied in order to determine the effect of substrate temperature on some dispersion parameters. Photoluminescence spectra showed different emissions in the visible region. The photodegradation mechanism of both Rhodamine B (RhB) and Malachite Green (MG) pollutants using TiO<sub>2</sub>–SnO<sub>2</sub>:F coupled oxide layer, grown at 350 <sup>°</sup>C, was discussed and an efficiency of about 90 %, after 3 h of sun irradiation, was achieved. Additionally, the layer exhibits good stability, recoverability and reusability after a cyclic test of 9 h, making it suitable for industrial applications. As a secondary application, a numerical simulation of TiO<sub>2</sub>–SnO<sub>2</sub>:F/CdS/CIGS solar cell, using SCAPS-1D software, was investigated for the first time. An open circuit voltage of about 613 mV was obtained, the current density Jsc was in the order of 33.49 mA/cm<sup>2</sup>, the Fill Factor FF and the efficiency were in the order of 79.13, 16.23 %, respectively.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116491"},"PeriodicalIF":3.8,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748118","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}

引用次数: 0

One pot synthesis of donor-acceptor carbon nitride with distinct thiophene rings accelerate photocatalytic hydrogen evolution 一锅合成具有不同噻吩环的供体-受体氮化碳，加速光催化氢气进化

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-23 DOI: 10.1016/j.optmat.2024.116482

Shigen Watanabe , Hideyuki Katsumata , Monir Uzzaman , Ikki Tateishi , Mai Furukawa , Satoshi Kaneco

{"title":"One pot synthesis of donor-acceptor carbon nitride with distinct thiophene rings accelerate photocatalytic hydrogen evolution","authors":"Shigen Watanabe , Hideyuki Katsumata , Monir Uzzaman , Ikki Tateishi , Mai Furukawa , Satoshi Kaneco","doi":"10.1016/j.optmat.2024.116482","DOIUrl":"10.1016/j.optmat.2024.116482","url":null,"abstract":"<div><div>Graphitic carbon nitride (g-CN) with a donor-acceptor structure was synthesized by urea and cross-linking thiophene precursors at the terminal sites, achieved through calcination of urea with four different thiophene-based precursors under atmospheric conditions. Among these, UDB-2-1, which incorporates dibenzothiophene-2-carboxyaldehyde (DB-2) 1 mg, demonstrated a hydrogen evolution activity of 650 μmol/g·h, approximately six times higher than pristine graphitic carbon nitride (U). The apparent quantum yield (AQY) was measured to be 4.01 %, 4.89 %, and 3.72 % at 400 nm, 420 nm, and 450 nm, respectively, in the presence of potassium hydrogen phosphate (KPH). This enhanced performance is attributed to increased visible light absorption from the n-π∗ transition introduced by the thiophene ring and enhanced charge separation due to the donor-acceptor (DA) structure, with DB-2 acting as an electron donor. Prepared photocatalysts were characterized by XRD, XPS, FTIR, SEM, TEM, BET, ESR, EIS, Mott-Schottky, DRS, PL, and TRPL measurement. This study provides a simple and effective strategy to improve carbon nitride performance and underscores the importance of functional group positioning and structural isomers in molecular design for solar-energy applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116482"},"PeriodicalIF":3.8,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724058","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}

引用次数: 0

Preparation of Ba4Lu3F17:Tb3+ fluorescent sensor and its detection for MnO4‐ and 4-NP

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-23 DOI: 10.1016/j.optmat.2024.116480

Jie Yang, Huimin Du, Yue Deng, Meifang Liu, Xingzuo Liu, Jun Yang, Shanshan Hu

{"title":"Preparation of Ba4Lu3F17:Tb3+ fluorescent sensor and its detection for MnO4‐ and 4-NP","authors":"Jie Yang, Huimin Du, Yue Deng, Meifang Liu, Xingzuo Liu, Jun Yang, Shanshan Hu","doi":"10.1016/j.optmat.2024.116480","DOIUrl":"10.1016/j.optmat.2024.116480","url":null,"abstract":"<div><div>Quantitative detection of permanganate (<span><math><mrow><msubsup><mtext>MnO</mtext><mn>4</mn><mo>‐</mo></msubsup></mrow></math></span>) and 4-nitrophenol (4-NP) is essential for environmental safety. Fluorescence detection technology is one of the most widely used detection technologies, which can be used for the detection of various anions and organic pollutants. In this paper, Ba<sub>4</sub>Lu<sub>3</sub>F<sub>17</sub>:Tb<sup>3+</sup> phosphors were successfully obtained by hydrothermal method. The morphology transition of Ba<sub>4</sub>Lu<sub>3</sub>F<sub>17</sub> crystal from nanoparticles through octahedron to hexagonal prism was realized in the pH range of 3–11. The best luminescent samples were obtained by changing the type of additives and the doping concentration of Tb<sup>3+</sup> ions. The obtained Ba<sub>4</sub>Lu<sub>3</sub>F<sub>17</sub>:Tb<sup>3+</sup> has high selectivity and anti-interference for <span><math><mrow><msubsup><mtext>MnO</mtext><mn>4</mn><mo>‐</mo></msubsup></mrow></math></span> and 4-NP detection, with the detection limits being 0.79 μM and 1.28 μM, respectively.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116480"},"PeriodicalIF":3.8,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748123","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}

引用次数: 0

Optimizing Light Sensing Capabilities of WSe2 FETs through Chemical Modulation of Carrier Dynamics 通过载流子动力学化学调制优化 WSe2 FET 的光传感能力

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-23 DOI: 10.1016/j.optmat.2024.116489

Sobia Nisar , Ghulam Dastgeer , Muhammad Shahzad Zafar , Muhammad Wajid Zulfiqar , Amina Musarat , Iqra Rabani , Muhammad Zahir Iqbal

{"title":"Optimizing Light Sensing Capabilities of WSe2 FETs through Chemical Modulation of Carrier Dynamics","authors":"Sobia Nisar , Ghulam Dastgeer , Muhammad Shahzad Zafar , Muhammad Wajid Zulfiqar , Amina Musarat , Iqra Rabani , Muhammad Zahir Iqbal","doi":"10.1016/j.optmat.2024.116489","DOIUrl":"10.1016/j.optmat.2024.116489","url":null,"abstract":"<div><div>Two-dimensional semiconductor materials demonstrate interesting electronic and optoelectronic properties, which can be further modulated through chemical doping to control carrier concentration and enhance device performance. This study explores the doping process of a few-layer thin WSe<sub>2</sub> using FeCl<sub>3</sub> solution as a dopant. We perform a thorough characterization utilizing Raman analysis and electrical testing to validate the doping of WSe<sub>2</sub>. The investigations reveal the p-type doping effect and a notable rise in hole concentration, further elucidated via the energy band diagram. Additionally, the WSe2 field-effect transistor (FET) operation is investigated under illumination with light of different wavelengths ranging from 220 nm to 514 nm both before and after doping. Following p-type doping, the device exhibited a notable increase in current, indicative of improved performance in photodetection. The responsivity and external quantum efficiency (EQE) are improved significantly after doping. This research confirms the effectiveness of p-type doping in WSe<sub>2</sub> and highlights its impact in enhancing the electronic and optoelectronic characteristics of WSe<sub>2</sub> devices. The results underscore the potential for advancing electronic and optoelectronic applications through such enhancements.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116489"},"PeriodicalIF":3.8,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723748","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}

引用次数: 0

Physical, thermal properties, FTIR and Raman spectroscopies as well as γ-ray attenuation capacity of borate glasses doped with Mn2+ ions: Role of CaO/Al2O3 substitution 掺杂 Mn2+ 离子的硼酸盐玻璃的物理、热性能、傅里叶变换红外光谱和拉曼光谱以及 γ 射线衰减能力：CaO/Al2O3 取代的作用

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-22 DOI: 10.1016/j.optmat.2024.116461

Mohamad Raheem Ahmed , Norah A.M. Alsaif , Nazima Siddiqui , A.S. Sai Prasad , Mudavat Srinivas , Shaik Kareem Ahmmad , Kawa M. Kaky , Abed Jawad Kadhim , Y.S. Rammah

{"title":"Physical, thermal properties, FTIR and Raman spectroscopies as well as γ-ray attenuation capacity of borate glasses doped with Mn2+ ions: Role of CaO/Al2O3 substitution","authors":"Mohamad Raheem Ahmed , Norah A.M. Alsaif , Nazima Siddiqui , A.S. Sai Prasad , Mudavat Srinivas , Shaik Kareem Ahmmad , Kawa M. Kaky , Abed Jawad Kadhim , Y.S. Rammah","doi":"10.1016/j.optmat.2024.116461","DOIUrl":"10.1016/j.optmat.2024.116461","url":null,"abstract":"<div><div>Calcium aluminium borate glasses (CABM glasses) doped with Mn<sup>2+</sup> ions were prepared by the melt quenching process. XRD, physical, thermal features, FTIR, and Raman spectroscopic measurements were performed. Also, the radiation attenuation capacity was evaluated. The following conclusions are drawn from the present study. The amorphous state of CABM glasses was proved by XRD measurements. Density (ρ) of samples varied from 3.827 g/cm<sup>3</sup> to 2.766 g/cm<sup>3</sup>. The refractive index increased as Al concentration increased. The glass transition temperature (Tg) decreased with the presence of aluminium oxide from 5 to 15 mol%. The structural elements BO<sub>3</sub> and BO<sub>4</sub> were located using the FTIR spectra. The bond vibrations of Ca<sup>2+</sup>, Mn–O, and Al were supported by their FTIR and Raman band assignments. It has been shown that the lengthening of the Al–O bond in AlO<sub>4</sub> is connected with an increase in molar volume. Mass (MAC) attenuation coefficient confirmed the following trend: (CABM0)<sub>MAC</sub> > (CABM1)<sub>MAC</sub> > (CABM2)<sub>MAC</sub> > (CABM3)<sub>MAC</sub> > (CABM4)<sub>MAC</sub>. Half (HVL) value layer verified the following order: CABM0 < CABM1 < CABM2 < CABM3 < CABM4. Results concluded that the suggested CABM glasses can be applied for solid state devices and radiation attenuation applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116461"},"PeriodicalIF":3.8,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724057","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}

引用次数: 0

Solvent effect on chiroptical properties of chiral atomically thin CdSe nanoplatelets capped with enantiomeric ligands 溶剂对以对映配体封端的手性原子级薄 CdSe 纳米片的光电特性的影响

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-22 DOI: 10.1016/j.optmat.2024.116483

Daria A. Kurtina , Hui Long , Shuai Chang , Roman B. Vasiliev

{"title":"Solvent effect on chiroptical properties of chiral atomically thin CdSe nanoplatelets capped with enantiomeric ligands","authors":"Daria A. Kurtina , Hui Long , Shuai Chang , Roman B. Vasiliev","doi":"10.1016/j.optmat.2024.116483","DOIUrl":"10.1016/j.optmat.2024.116483","url":null,"abstract":"<div><div>Chiral semiconductor nanostructures have growing interest due to applications in enantioselective catalyst and separation, chiral sensing, photonics and spintronics. Here, we have studied solvent effect on the optical and chiroptical properties of atomically thin 2 and 3 monolayers (0.6 and 0.9 nm) thick CdSe nanoplatelets (NPLs) grown by a colloidal method and capped with chiral N-acetyl-<span>l</span>-cysteine ligand. An analysis of the dependence of circular dichroism on the dielectric constants of organic solvents demonstrates an order-of-magnitude increase in the dissymmetry factor for heavy-hole (HH) and light-hole (LH) excitons with a decrease in the dielectric constant of the solvent achieving 2‧10<sup>−2</sup> for the thinnest 2 ML NPLs. It was supplemented by a change in the contributions of HH and LH excitons to the absorption spectra and variation in the spectral position of excitons, which can be explained by the effect of dielectric screening of 2D excitons. Our study demonstrates approaches to control the rotational strength of 2D excitons in chiral semiconductor NPLs simply by changing the surrounding environment, which is important for chiroptical applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116483"},"PeriodicalIF":3.8,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724131","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}

引用次数: 0

High-temperature stability and decoding of large field-of-view observable color codes prepared by femtosecond laser on titanium alloy 飞秒激光在钛合金上制备的大视场可观测色码的高温稳定性和解码性

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-11-22 DOI: 10.1016/j.optmat.2024.116472

Xiaoyun Sun , Wenjun Wang , Xuesong Mei , Chuanwei Zhang

{"title":"High-temperature stability and decoding of large field-of-view observable color codes prepared by femtosecond laser on titanium alloy","authors":"Xiaoyun Sun , Wenjun Wang , Xuesong Mei , Chuanwei Zhang","doi":"10.1016/j.optmat.2024.116472","DOIUrl":"10.1016/j.optmat.2024.116472","url":null,"abstract":"<div><div>This study reported on the large field-of-view observable color code obtained by femtosecond laser-induced oxidation on titanium alloy. The simulation results showed that simultaneous roughening of the oxide layer and metal layer could effectively increase the color rendering range of the structural colors. Based on the diffraction effect of the diaphragm, the laser energy was periodically distributed. In addition, the simultaneous formation of the oxide layer and the micro/nano structures was attributed to the periodic distribution of laser energy. Compared to the substrate, the increase in oxygen content of the colored area ranged from 5 % to 11 %, indicating that the infiltration of oxygen inside the material was increased. Additionally, the surface chemical composition of the upper oxide layer of the colored areas was TiO<sub>2</sub>. XRD analysis showed that laser-induced surface coloring did not affect the phase composition of the alloy except for the generation of a small amount of carbon. Moreover, different scanning numbers affected the color difference <em>ΔE∗ ab</em> of adjacent scanning speeds. High-temperature experiments showed that the color code prepared by femtosecond laser-induced oxidization of titanium alloy was reliable in use at less than 100 °C. Since the color code could still be clearly obtained at a field angle of 77.3°, the angle insensitivity of the color code could be effectively improved by selective roughening of the oxide layer prepared by femtosecond laser. Furthermore, the decoding of color code was the inverse encoding process. Therefore, the angle insensitivity of the color code was improved and the temperature range of the structural color was clarified.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"158 ","pages":"Article 116472"},"PeriodicalIF":3.8,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724125","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}

引用次数: 0