Optical Materials最新文献_第5页

Radiochromic responses of Gafchromic EBT3 film under neutron exposure 中子辐照下钆致变色EBT3薄膜的放射变色响应

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-12 DOI: 10.1016/j.optmat.2026.117957

Omar M. Kotb , Elsayed K. Elmaghraby , M. El Ghazaly , Amal Mohamed

{"title":"Radiochromic responses of Gafchromic EBT3 film under neutron exposure","authors":"Omar M. Kotb , Elsayed K. Elmaghraby , M. El Ghazaly , Amal Mohamed","doi":"10.1016/j.optmat.2026.117957","DOIUrl":"10.1016/j.optmat.2026.117957","url":null,"abstract":"<div><div>The response of Gafchromic<sup>TM</sup> EBT3 films to moderated and fast neutron fields was systematically investigated to assess their potential for neutron detection. The reliability of the EBT3 films in high-resolution neutron dosimeters makes them suitable for applications in neutron-based radiotherapy, where accurate neutron fluence mapping is critical for treatment planning and verification. The film responses were quantified by flatbed scanning using color channel analysis and UV–Vis absorption spectroscopy for the determination of optical properties such as band gaps and Urbach energy. Both moderated and fast neutrons induced a measurable change in optical density, demonstrating the intrinsic neutron sensitivity of the film through internal conversion mechanisms (proton recoils and <span><math><mrow><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup><mtext>Li</mtext><mrow><mo>(</mo><mi>n</mi><msup><mrow><mo>,</mo></mrow><mrow><mn>3</mn></mrow></msup><mtext>H</mtext><mo>)</mo></mrow><mi>α</mi></mrow></math></span> reaction). Flatbed scanning analysis demonstrated a useful dynamic range in the Red, Green, and weighted Gray channels that was highly correlated with neutron fluence. The moderated neutron setup exhibited a significantly higher response and faster transition to saturation compared to the fast neutron setup. This elevated sensitivity is attributed to the coincident dose contribution from associated prompt and delayed gamma radiation inherent in the moderated field, highlighting a challenge for neutron-only dosimetry. Results showed that Urbach energy is a highly sensitive parameter, superior to that from standard optical density and band gap measurements, for characterizing the structural effects of neutron irradiation, offering an adjunct technique to complement traditional fluence estimation.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117957"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384786","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

Controlling copper zinc tin sulfide (CZTS) absorber layer properties through pneumatic spray pyrolysis deposition parameters 通过气动喷雾热解沉积参数控制硫化铜锌锡（CZTS）吸收层性能

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-01-23 DOI: 10.1016/j.optmat.2026.117878

Mohammad Arab, Akbar Eshaghi, Ehsan Mohammad Sharifi

{"title":"Controlling copper zinc tin sulfide (CZTS) absorber layer properties through pneumatic spray pyrolysis deposition parameters","authors":"Mohammad Arab, Akbar Eshaghi, Ehsan Mohammad Sharifi","doi":"10.1016/j.optmat.2026.117878","DOIUrl":"10.1016/j.optmat.2026.117878","url":null,"abstract":"<div><div>CZTS is considered a strong contender for third-generation solar cell technologies due to its composition of Earth abundant, low-cost, and non-toxic elements. However, achieving high quality CZTS thin films through scalable and economically viable synthesis routes remains a considerable challenge. This study addresses that gap by optimizing three key fabrication parameters using a practical and cost effective pneumatic spray pyrolysis technique. The process optimization was guided by the Taguchi method, which systematically evaluated the effects of three variables substrate temperature, annealing temperature, and annealing time each tested at three levels. After deposition, all samples were characterized using X-ray diffraction (XRD), and the data were thoroughly analyzed using specialized software. The analysis identified the optimal synthesis conditions for obtaining a pure CZTS phase, a substrate temperature of 300 °C, an annealing temperature of 510 °C, and an annealing duration of 70 min. To validate these optimal parameters, a CZTS sample was fabricated under the defined conditions and subjected to comprehensive characterization, including XRD, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), and diffuse reflectance spectroscopy (DRS). The results confirmed that the sample exhibited structural integrity and favorable optical and electrical characteristics suitable for photovoltaic applications. Notably, DRS analysis showed that the optimized CZTS film had strong absorption throughout the visible spectrum and featured a direct band gap of 1.61 eV an ideal value for solar energy conversion. These findings reinforce the potential of this synthesis route for producing high performance CZTS absorber layers on a commercial scale.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117878"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080243","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

Sm2+-doped CsEuI3 crystals with highly efficient near-infrared emission and X-ray radioluminescence 具有高效近红外发射和x射线辐射发光的Sm2+掺杂CsEuI3晶体

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-01-29 DOI: 10.1016/j.optmat.2026.117932

Fan Xu, Qinhua Wei, Chang Shu, HaoHan Wang, Hang Yin, Suyin Zhang, Gao Tang, Laishun Qin

{"title":"Sm2+-doped CsEuI3 crystals with highly efficient near-infrared emission and X-ray radioluminescence","authors":"Fan Xu, Qinhua Wei, Chang Shu, HaoHan Wang, Hang Yin, Suyin Zhang, Gao Tang, Laishun Qin","doi":"10.1016/j.optmat.2026.117932","DOIUrl":"10.1016/j.optmat.2026.117932","url":null,"abstract":"<div><div>Near-infrared (NIR)-emitting scintillators coupled with high-quantum-efficiency silicon-based photodetectors are an effective strategy to improve the radiation detection properties. In this study, the highly efficient broad NIR-emitting CsEuI<sub>3</sub> halide scintillator is developed via Sm<sup>2+</sup> doping. The centimeter-scale CsEuI<sub>3</sub>:Sm<sup>2+</sup> scintillation crystals were successfully grown using the Bridgman method. The crystal structure and composition were analyzed and discussed using Inductively Coupled Plasma Mass Spectrometry (ICP-MS), X-ray Diffraction (XRD), and X-ray Photoelectron Spectroscopy (XPS), revealing that Sm<sup>2+</sup> successfully replaces Eu<sup>2+</sup> in the crystal lattice. Under ultraviolet (UV) and X-ray excitation, the broad 5d - 4f emission band of Sm<sup>2+</sup> and Eu<sup>2+</sup> are observed, peaking at 825 and 452 nm, respectively. The CsEuI<sub>3</sub>:Sm crystal presents a high NIR photoluminescence quantum yield (PLQY) of 80.5 %. The energy transfer processes between Eu<sup>2+</sup> and Sm<sup>2+</sup> are investigated by using photoluminescence (PL) spectra and decay kinetics. The scintillation mechanism, luminescence thermal stability and defect are discussed based on thermoluminescence (TL) and variable-temperature X-ray luminescence (XEL). This work provides a novel NIR scintillation material with excellent performance for applications in radiation detection, NIR spectroscopy and night vision.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117932"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385146","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 multilayer SnO2 architectures on charge transport and optical properties in triple-cation perovskite solar cells 多层SnO2结构对三阳离子钙钛矿太阳能电池电荷输运和光学性质的影响

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-12 DOI: 10.1016/j.optmat.2026.117947

Nur Farah Hanun Wira , Kai Jeat Hong , Chi Chin Yap , Kok-Keong Chong , Josephine Ying Chyi Liew , Hock Beng Lee , Jae-Wook Kang , Mohammad Hafizuddin Hj Jumali , Mohd Hafiz Mohd Zaid , Sin Tee Tan

{"title":"Effect of multilayer SnO2 architectures on charge transport and optical properties in triple-cation perovskite solar cells","authors":"Nur Farah Hanun Wira , Kai Jeat Hong , Chi Chin Yap , Kok-Keong Chong , Josephine Ying Chyi Liew , Hock Beng Lee , Jae-Wook Kang , Mohammad Hafizuddin Hj Jumali , Mohd Hafiz Mohd Zaid , Sin Tee Tan","doi":"10.1016/j.optmat.2026.117947","DOIUrl":"10.1016/j.optmat.2026.117947","url":null,"abstract":"<div><div>Triple-cation halide perovskites have emerged as highly promising absorbers for perovskite solar cells (PSCs) owing to their excellent intrinsic optoelectronic properties. Nevertheless, challenges such as device instability and current-voltage hysteresis, often originating from hydroxyl-rich electron transport layers (ETLs) like ZnO and TiO<sub>2</sub>, continue to hinder device performance. In this work, SnO<sub>2</sub>-based ETLs with different layer architectures were engineered and integrated into planar PSCs (FTO/SnO<sub>2</sub>/perovskite/Spiro-OMeTAD/Ag) to mitigate these limitations. Three ETL configurations were investigated: a reference bilayer comprising one amorphous and one crystalline SnO<sub>2</sub> layer (1A1C), a single amorphous layer with a double crystalline stack (1A2C), and a double amorphous layer with a single crystalline layer (2A1C). Comprehensive structural, optical, and photovoltaic analyses revealed that the 1A2C configuration delivered the best performance, achieving a power conversion efficiency (PCE) of 15.33% (V<sub>OC</sub> = 1.04 V, J<sub>SC</sub> = 15.46 mA cm<sup>−2</sup> and FF = 71.50%), compared to 12.16% for the 1A1C reference. The superior efficiency of the 1A2C device is attributed to improved charge transport layer and suppressed carrier recombination at the ETL/perovskite interface, arising from optimized ETL architecture. This study demonstrates a simple yet effective route for enhancing PSC efficiency and stability, offering valuable insights for advancing perovskite device engineering.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117947"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385255","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

Eco-friendly Ag2S QDs/PDPP3T inorganic-organic hybrid heterostructures for broadband photodetection 用于宽带光探测的环保Ag2S量子点/PDPP3T无机-有机杂化异质结构

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-18 DOI: 10.1016/j.optmat.2026.117975

Hanjia Hu , Shangbing He , Mengfei He , Haocheng He , Daxiu Tang , Xiaoning Guan , Guoxiang Wang , Chenjie Gu , Xiang Shen

{"title":"Eco-friendly Ag2S QDs/PDPP3T inorganic-organic hybrid heterostructures for broadband photodetection","authors":"Hanjia Hu , Shangbing He , Mengfei He , Haocheng He , Daxiu Tang , Xiaoning Guan , Guoxiang Wang , Chenjie Gu , Xiang Shen","doi":"10.1016/j.optmat.2026.117975","DOIUrl":"10.1016/j.optmat.2026.117975","url":null,"abstract":"<div><div>Photodetectors featuring broadband detection capability, along with a facile and environmentally friendly preparation process, are critical and highly desirable for diverse optoelectronic applications. Herein, an environmentally friendly, easily fabricated Ag<sub>2</sub>S QDs/PDPP3T inorganic-organic hybrid heterojunction was constructed to develop the 0D/2D broadband photodetector. In the experiment, the Ag<sub>2</sub>S QDs were first synthesized by a microwave-heating method, and the photoresponse of the pure Ag<sub>2</sub>S QDs detector was optimized via tuning the microwave power and reactant ratio. Subsequently, the PDPP3T was deposited on the Ag<sub>2</sub>S QDs thin film to construct the heterostructure, aiming to further enhance the photo-sensing performance. The measurement results revealed that the device exhibited excellent performance within the visible to near-infrared wavelength region. Under laser illumination at 400, 532, and 900 nm, the responsivity, detectivity, and external quantum efficiency (EQE) reached 274.3 A/W, 4.62 × 10<sup>13</sup> Jones, 849.4%; 225.8 A/W, 3.79 × 10<sup>13</sup> Jones, 524.4%; and 280.7 A/W, 4.72 × 10<sup>13</sup> Jones, 429.7%, respectively. Whereas the maximum responsivity, detectivity and EQE of the device reach 393.4 A/W 6.62 × 10<sup>13</sup> Jones and 871%, respectively, which were measured at a wavelength of 700 nm. Moreover, the detector also demonstrated excellent response dynamics, with rise/fall times of 33.6/45.1 ms. In essence, these achievements were attributed to the enhanced light absorption of PDPP3T and optimized band alignment, which ultimately facilitated efficient carrier separation and collection.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117975"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385263","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 photonic crystal microspheres with highly saturated structural color through W/O/W multiple emulsion as the soft template 以W/O/W复合乳剂为软模板制备结构色高饱和光子晶体微球

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-16 DOI: 10.1016/j.optmat.2026.117979

Xiaoyu Bai, Qiang Zhao, Tongtong Cao, Ming Li, Yuhua Cao

{"title":"Preparation of photonic crystal microspheres with highly saturated structural color through W/O/W multiple emulsion as the soft template","authors":"Xiaoyu Bai, Qiang Zhao, Tongtong Cao, Ming Li, Yuhua Cao","doi":"10.1016/j.optmat.2026.117979","DOIUrl":"10.1016/j.optmat.2026.117979","url":null,"abstract":"<div><div>The cured photonic crystal microspheres was prepared through a soft template of water-in-oil-in-water (W/O/W) multiple emulsion, where poly(styrene/methacrylic acid)@polydopamine (P(St/MAA)@PDA) nanoparticles dispersed in water to build liquid colloidal crystals (LCCs) as the inner water phase. P(St/MAA)@PDA nanoparticles were prepared by in situ polymerization of dopamine (DA) on the surface of P(St/MAA) nanoparticles. P(St/MAA)@PDA LCCs with highly saturated colors were obtained owing to PDA absorbing incoherent scattered light. As the mass ratio of PDA to P(St/MAA) nanoparticles increased from 0.1 to 0.5, the arrangement of P(St/MAA)@PDA nanoparticles changed from long-range ordering to short-range ordering, and the angular dependence of the LCCs color gradually disappeared. As the mass fraction of P(St/MAA)@PDA nanoparticles ranged from 20% to 40%, the LCCs had angular dependent and bright color. The content of W/O emulsifier influenced the color phase and brightness of the cured microspheres. The cured microspheres with different sizes were obtained through adjusting the second emulsifying time to form W/O/W emulsion. Finally, the cured microspheres with blue, green and red colors were prepared by controlling the particle size of P(St/MAA) nanoparticles. P(St/MAA)@PDA microspheres with highly saturated structural colors can be directly applied as photonic crystal pigments in coatings and cosmetics without secondary assembly.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117979"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385383","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

Optical absorption and nonstoichiometry of YAG crystals grown by the HDC method in reducing atmosphere 还原气氛中HDC法生长YAG晶体的光学吸收和非化学计量学研究

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-16 DOI: 10.1016/j.optmat.2026.117973

N.S. Sidelnikova, Yu V. Siryk, S.V. Nizhankovskyi

{"title":"Optical absorption and nonstoichiometry of YAG crystals grown by the HDC method in reducing atmosphere","authors":"N.S. Sidelnikova, Yu V. Siryk, S.V. Nizhankovskyi","doi":"10.1016/j.optmat.2026.117973","DOIUrl":"10.1016/j.optmat.2026.117973","url":null,"abstract":"<div><div>The features of the optical and spectral characteristics (190-1100 nm), and the mechanism of the formation of nonstoichiometry of yttrium-aluminum garnet (YAG) crystals during growth by the horizontal directional crystallization method in a reducing atmosphere containing CO, H<sub>2</sub> and annealing in environments with different redox potentials were investigated. It has been established that the two-tone coloration of the crystals with the formation of broad absorption bands (380-500 nm, 550-750 nm) is determined by the intrinsic centers arising as a result of nonstoichiometric evaporation of YAG, and include antistructural defects (Y<sub>Al</sub>), cationic and anionic vacancies, as well as the associated F<sup>+</sup>–Y<sub>Al</sub>, O<sup>−</sup>–Y<sub>Al</sub> complexes, which are unevenly distributed in the crystal along the growth direction. The role of polyvalent impurities (Ti, Fe and С in the concentration range ≤0,1 wt%) is mainly to generate intrinsic defects, which ensure the electroneutrality of the lattice and lead to an increase in the intensity of the absorption without the formation of additional impurity bands. It is shown that the addition of excess Al<sub>2</sub>O<sub>3</sub> (≤2 wt%) to the mixture leads to a noticeable decrease in the color and absorption intensity of the crystals in the entire spectral range studied.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117973"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385387","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

GaN surface micro-nanostructures induced by femtosecond vector beams for high-sensitivity SERS applications 飞秒矢量光束诱导GaN表面微纳结构的高灵敏度SERS应用

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-16 DOI: 10.1016/j.optmat.2026.117972

Shengbin Zhao, Shutong Wang, Zhenxing Xu, Mengtao Yang, Lufan Qi, Quan Chen, Hao Zhou, Guoliang Deng

{"title":"GaN surface micro-nanostructures induced by femtosecond vector beams for high-sensitivity SERS applications","authors":"Shengbin Zhao, Shutong Wang, Zhenxing Xu, Mengtao Yang, Lufan Qi, Quan Chen, Hao Zhou, Guoliang Deng","doi":"10.1016/j.optmat.2026.117972","DOIUrl":"10.1016/j.optmat.2026.117972","url":null,"abstract":"<div><div>Fabricating rich surface micro/nanostructures on gallium nitride (GaN)-based surface-enhanced Raman scattering (SERS) substrates represents a critical approach to boosting their detection performance. In this study, we propose a method of fabricating hierarchical micro-nanostructures on GaN surfaces using femtosecond vector light fields, while systematically assessing its potential applications in SERS. By modulating the polarization state of vector beams, diverse microstructures were induced on the GaN thin film surfaces. Additionally, by varying the overlap ratio of adjacent laser spots, we successfully fabricated three types of periodic surface structures, namely micropillar arrays, hybrid arrays, and micropit arrays. Experimental results reveal that depositing a 50 nm-thick silver film on these structures leads to the formation of abundant electromagnetic field hotspots, thereby significantly enhancing SERS performance. Among these structures, the hybrid structure prepared with a 15% spot overlap rate exhibits the optimal SERS enhancement effect, attributed to its richer nanoscale features. This structure achieves a detection limit of 10<sup>−11</sup> M for methylene blue (MB) solution, and an enhancement factor (EF) of 1.43 × 10<sup>9</sup>. Furthermore, the Ag/GaN SERS substrate demonstrated excellent signal uniformity and temporal stability. This work provides a new insight into the functionalizing GaN surfaces and holds substantial potential applications in biochemical sensing and optoelectronic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117972"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385389","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

Rare-earth doping of AgGaGe3Se8: A pathway to multifunctional materials for tunable optoelectronics 稀土掺杂AgGaGe3Se8：可调谐光电子多功能材料的途径

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-13 DOI: 10.1016/j.optmat.2026.117966

G. Myronchuk , M. Kyrychenko , P. Rakus , J. Jedryka , S. Taboukhat , D. Guichaoua , B. Sahraoui

{"title":"Rare-earth doping of AgGaGe3Se8: A pathway to multifunctional materials for tunable optoelectronics","authors":"G. Myronchuk , M. Kyrychenko , P. Rakus , J. Jedryka , S. Taboukhat , D. Guichaoua , B. Sahraoui","doi":"10.1016/j.optmat.2026.117966","DOIUrl":"10.1016/j.optmat.2026.117966","url":null,"abstract":"<div><div>This study explores the impact of rare-earth ion doping (Nd<sup>3+</sup>, Er<sup>3+</sup>) on the complex optical, photoelectric, and functional properties of advanced AgGaGe<sub>3</sub>Se<sub>8</sub> chalcogenide crystals. The findings demonstrate that Er<sup>3+</sup> doping, in particular, serves as an efficient strategy for band structure engineering, resulting in a reduced band gap (Eg down to 2.20 eV) and a marked increase in static structural disorder (Urbach energy Eu up to 81 meV), while preserving high transparency in the mid infrared region.</div><div>These microscale modifications manifest in a pronounced enhancement of the impurity photoconductivity peak (∼1.65 eV), supporting the formation mechanism of defect centers, notably silver vacancies. Crucially, the altered electronic structure drives a synergistic improvement in the material's functional performance: the piezoelectric coefficient d<sub>33</sub> rises to 35 p.m./V, and second harmonic generation (SHG) efficiency is significantly boosted. Moreover, the study demonstrates the feasibility of optically modulating the piezoelectric response.</div><div>Overall, the results confirm that targeted rare-earth doping is a powerful approach for developing novel multifunctional materials for infrared optoelectronics, offering tunable piezoelectric behavior and enhanced nonlinear optical properties.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117966"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385391","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

Predicting fs-laser-induced NV centers with PCA and neural networks 用PCA和神经网络预测fs激光诱导的NV中心

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-01-23 DOI: 10.1016/j.optmat.2026.117917

Murilo Neco Saraiva, Orlando Marbello Ospina, Lucas Konaka Nolasco, Renan Souza Cunha, Lucas Nunes Sales de Andrade, Sergio Ricardo Muniz, Cleber Renato Mendonca

{"title":"Predicting fs-laser-induced NV centers with PCA and neural networks","authors":"Murilo Neco Saraiva, Orlando Marbello Ospina, Lucas Konaka Nolasco, Renan Souza Cunha, Lucas Nunes Sales de Andrade, Sergio Ricardo Muniz, Cleber Renato Mendonca","doi":"10.1016/j.optmat.2026.117917","DOIUrl":"10.1016/j.optmat.2026.117917","url":null,"abstract":"<div><div>Diamond hosts a variety of lattice defects, among which nitrogen-vacancy (NV) centers stand out due to their relevance in quantum photonics with optically addressable qubits. Yet, the complex laser–material interactions governing its formation are not fully understood, and the influence of laser parameters on NV generation still raises open questions. Here, we investigate the generation of NV centers using principal component analysis (PCA) and artificial neural networks (ANNs) as predictive tools based on femtosecond laser parameters. Experimental results from femtosecond laser micromachining of diamond provided the dataset for our analysis. We employed PCA to reduce data dimensionality and uncover dominant experimental trends, while a multilayer perceptron model was trained to predict NV center generation under simulated conditions. GridSearch optimization and Leave-One-Out cross-validation (LOOCV) ensured the best performance and robustness of the ANN. Our results reveal that NV center generation is directly proportional to laser peak fluence and inversely proportional to pulse duration and excitation wavelength. Notably, PCA and ANN modeling independently converged on consistent trends, reinforcing the reliability of the observed parameter–defect relationships. This convergence supports the development of predictive frameworks for controlled color center generation in diamond with greater precision.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117917"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080306","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