Optical Materials最新文献_第6页

Unveiling the role of Gd3+ and Mg2+ co-doping on morphology and upconversion luminescence in NaYbF4: Er3+ particles 揭示了Gd3+和Mg2+共掺杂对NaYbF4: Er3+粒子形态和上转换发光的影响

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.2026.117931

Tamilmani Vairapperumal , Lakshmi Mukhopadhyay , Vineet Kumar Rai

引用次数: 0

Wavelength dependent photocatalytic decolorization of dyes using zinc oxide nanorod catalyst 波长依赖性氧化锌纳米棒催化剂对染料的光催化脱色

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-02 DOI: 10.1016/j.optmat.2026.117938

Myo Tay Zar Myint , Salim Al-Harthi , Zahra Al-Sharji , Tamadher Al-Salmani , Mohammed Al-Abri , Htet Htet Kyaw

{"title":"Wavelength dependent photocatalytic decolorization of dyes using zinc oxide nanorod catalyst","authors":"Myo Tay Zar Myint , Salim Al-Harthi , Zahra Al-Sharji , Tamadher Al-Salmani , Mohammed Al-Abri , Htet Htet Kyaw","doi":"10.1016/j.optmat.2026.117938","DOIUrl":"10.1016/j.optmat.2026.117938","url":null,"abstract":"<div><div>Various wavelengths generate different energies and can serve as excitation sources for the photocatalysis process. In this research, a step-by-step process was employed to fabricate zinc oxide (ZnO) nanorods by wet chemical synthesis method on a glass surface. Different colors of light-emitting diodes (LEDs) excited the ZnO photocatalyst and degraded two dyes, namely methylene blue (MB) and Congo red (CR). The highest degradation efficiency of 95% for CR dye, as well as the fastest reaction kinetics (0.0089 min<sup>−1</sup>), was achieved under blue LED irradiation. For MB dye, the red LED yielded the highest degradation (72%), and the fastest degradation kinetics (0.0024 min<sup>−1</sup>) was observed under white LED irradiation. Energy matching between defect states of ZnO nanorods and the blue LED emission, together with the spectral overlap between the dye and the excitation source, enhances reactive oxygen species generation. This improves dyes degradation. Time-dependent photon efficiency estimation results showed the maximum efficiency of 11.8% at the 3rd hour of the photocatalytic process for MB dye under red LED excitation. This finding contributes to the understanding of the excitation wavelength-dependent photodegradation phenomenon in color dyes, aiming to maximize the energy efficient degradation process.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117938"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385153","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

Self-powered Ge2Sb2Te5 on n-Si photodiode for UV–Vis detection fabricated by Pulsed Laser Deposition 脉冲激光沉积制备用于紫外可见检测的n-Si自供电Ge2Sb2Te5光电二极管

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-03 DOI: 10.1016/j.optmat.2026.117930

Bhavna Thakur, Anirban Mitra, Rajesh Kumar

{"title":"Self-powered Ge2Sb2Te5 on n-Si photodiode for UV–Vis detection fabricated by Pulsed Laser Deposition","authors":"Bhavna Thakur, Anirban Mitra, Rajesh Kumar","doi":"10.1016/j.optmat.2026.117930","DOIUrl":"10.1016/j.optmat.2026.117930","url":null,"abstract":"<div><div>The self-powered photodiode operates at zero bias and is highly appealing because of its autonomous function without an external source, which makes it sustainable and ideal for eco-friendly uses. The primary objective of this study is to investigate the self-powered heterojunction device composed of p-type crystalline <span><math><mrow><msub><mrow><mtext>Ge</mtext></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mtext>Sb</mtext></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mtext>Te</mtext></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span> (cGST) and n-type silicon (n-Si), where the cGST thin film is deposited using the Pulsed Laser Deposition (PLD) technique. The <span><math><mi>I</mi></math></span>–<span><math><mi>V</mi></math></span> characteristics of the heterojunction were measured under dark and using LED light sources with different wavelengths (365, 455, and 735 nm) under constant illumination power. The ideality factor (<span><math><mi>η</mi></math></span>) was found to be 4.51, under dark condition. Under the self-powered mode, the photodiode exhibited a maximum responsivity (<em>R</em>) of 1.78 mA/W and a detectivity (<span><math><msup><mrow><mi>D</mi></mrow><mrow><mo>∗</mo></mrow></msup></math></span>) of 5.34 <span><math><mo>×</mo></math></span> <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>9</mn></mrow></msup></mrow></math></span> Jones under illumination with 735 nm wavelength light. The photodiode showed responsivity of 29.15 mA/W under an applied reverse bias of <span><math><mo>−</mo></math></span>3 V with a source wavelength of 735 nm. The response time of the device was measured on the order of milliseconds. This work reports for the first time the calculation of key parameters such as junction width (W), response time, noise equivalent power (NEP), and external quantum efficiency (EQE) for the cGST/n-Si self-powered heterojunction device.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117930"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385156","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

Growth and optical characterizations of LaCa4O(BO3)3 and Sm0.3:La0.7Ca4O(BO3)3 nonlinear optical crystals LaCa4O(BO3)3和Sm0.3:La0.7Ca4O(BO3)3非线性光学晶体的生长和光学特性

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-01-22 DOI: 10.1016/j.optmat.2026.117918

Jianglin Wang , Linwen Jiang , Chen Yang , Yanqing Zheng , Liejia Qian , Shuai Wang , Zhigang Sun

{"title":"Growth and optical characterizations of LaCa4O(BO3)3 and Sm0.3:La0.7Ca4O(BO3)3 nonlinear optical crystals","authors":"Jianglin Wang , Linwen Jiang , Chen Yang , Yanqing Zheng , Liejia Qian , Shuai Wang , Zhigang Sun","doi":"10.1016/j.optmat.2026.117918","DOIUrl":"10.1016/j.optmat.2026.117918","url":null,"abstract":"<div><div>To expand nonlinear optical crystal variety for quasi-parametric chirped pulse amplification (QPCPA), a scheme for constructing a parametric amplification process equivalent to the dynamic behavior of an energy-level laser amplifier by applying strong dissipative modulation to idle light, Sm<sub>0.3</sub>:La<sub>0.7</sub>Ca<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> (Sm:LaCOB) is designed and grown. In this study, LaCa<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> (LaCOB) and Sm:LaCOB single crystals are grown by Bridgman method, with their structural, thermal, and optical properties systematically characterized. Research results indicate that the incorporation of Sm<sup>3+</sup> into LaCOB enhances the thermal performance, thereby improving thermal stability in QPCPA system. LaCOB exhibits a high transmittance of up to 83 % across the 200–2400 nm wavelength range. Sm:LaCOB displays strong absorption peaks near 1229 nm, 1366 nm, 1474 nm, and 1534 nm and maximum absorption cross-section of 8.31 × 10<sup>−21</sup> cm<sup>2</sup> (@1480 nm). Additionally, Sm:LaCOB emits orange-red luminescence at 618 nm, featuring a luminescence decay time (τ) of 0.14 ms. First-principles calculations determine that the band gap of LaCOB is 4.38 eV. Collectively, these data and analyses demonstrate the significant application potential of Sm:LaCOB in QPCPA systems.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117918"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080244","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

A water-stable formamidinium lead bromide perovskite nanocrystals@molecularly imprinted polymers fluorescent sensor for ultrasensitive detection of sulfadiazine 水稳定型甲脒基溴化铅钙钛矿nanocrystals@molecularly印迹聚合物荧光传感器超灵敏检测磺胺嘧啶

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-01-28 DOI: 10.1016/j.optmat.2026.117926

Zhiqun Xu , Bo Hou , Pingping Fan , Zhonghua Pan , Guobin Huang , Teng Gao

{"title":"A water-stable formamidinium lead bromide perovskite nanocrystals@molecularly imprinted polymers fluorescent sensor for ultrasensitive detection of sulfadiazine","authors":"Zhiqun Xu , Bo Hou , Pingping Fan , Zhonghua Pan , Guobin Huang , Teng Gao","doi":"10.1016/j.optmat.2026.117926","DOIUrl":"10.1016/j.optmat.2026.117926","url":null,"abstract":"<div><div>The widespread use of sulfadiazine (SDZ) in veterinary medicine and its subsequent accumulation in environmental waters necessitate the development of sensitive and selective monitoring tools. This study presents a novel hierarchical core-shell fluorescent nanocomposite, FAPbBr<sub>3</sub> PNCs@SiO<sub>2</sub>@MIP, for the ultrasensitive and selective detection of SDZ. The sensor was constructed by encapsulating water-sensitive formamidinium lead bromide perovskite nanocrystals (FAPbBr<sub>3</sub> PNCs) with a protective silica shell, followed by the grafting of a molecularly imprinted polymer (MIP) layer. The silica coating markedly improved the aqueous stability of the PNCs, while the MIP layer provided specific recognition cavities for SDZ, enabling detection through a photoinduced electron transfer-mediated fluorescence quenching mechanism. Under optimal conditions, the sensor demonstrated a wide linear response from 0.1 to 200 ng/mL and a remarkably low detection limit of 0.03 ng/mL. It also exhibited excellent selectivity against structurally analogous sulfonamides and common interfering ions (Imprinting factor is 3.9), along with high reproducibility and stability in complex media (94.3–100.9 % for the same batch, 98.9–101.4 % and 99.2–104.2 % for different batches). The practical applicability was validated through the successful detection of SDZ in real water and pork samples (Recovery was 99.2–112.0 %, RSD was 2.3–8.9 %), yielding results in good agreement with those from the standard liquid chromatography coupled with mass spectrometry (LC-MS) method. This work establishes a robust and reliable sensing platform for trace-level SDZ monitoring in environmental and food safety applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117926"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080207","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

Synthesis and characterization of Lu2O3:Eu3+@SiO2-pABA hybrid nanoparticles: Enhanced luminescence and biocompatibility Lu2O3:Eu3+@SiO2-pABA杂化纳米颗粒的合成与表征：增强发光和生物相容性

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.2026.117956

María Luz Carrera-Jota , Ana Leticia Arregui Mena , Carlos Felipe Hernández-Fuentes , Pedro Adrián Martínez-Montoya , Fernando Juarez-López , Ángel de Jesús Morales-Ramírez

{"title":"Synthesis and characterization of Lu2O3:Eu3+@SiO2-pABA hybrid nanoparticles: Enhanced luminescence and biocompatibility","authors":"María Luz Carrera-Jota , Ana Leticia Arregui Mena , Carlos Felipe Hernández-Fuentes , Pedro Adrián Martínez-Montoya , Fernando Juarez-López , Ángel de Jesús Morales-Ramírez","doi":"10.1016/j.optmat.2026.117956","DOIUrl":"10.1016/j.optmat.2026.117956","url":null,"abstract":"<div><div>This study presents the synthesis and comprehensive characterization of novel hybrid nanomaterials based on europium-doped lutetium oxide (Lu<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup>) embedded within a silica matrix (SiO<sub>2</sub>) and covalently functionalized with 4-aminobenzoic acid (pABA) via sol-gel and reflux processes. Structural, morphological, and thermal analyses—performed using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA)—confirmed the successful formation of highly stable hybrid systems. Photoluminescence studies revealed a marked enhancement in emission intensity, attributed to efficient energy transfer from the organic ligand to Eu<sup>3+</sup> ions and improved stabilization provided by the <em>p</em>ABA covalent bonding. The optimized Lu<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup>@SiO<sub>2</sub>-<em>p</em>ABA hybrids exhibited strong visible emission under UV excitation and superior luminescence efficiency compared to unfunctionalized systems. Cytotoxicity assays using MDA-MB-231 breast cancer cells demonstrated excellent biocompatibility, underscoring the potential of these nanomaterials for biomedical applications such as bioimaging and optical diagnostics. Overall, these findings highlight the effectiveness of <em>p</em>ABA functionalization in producing thermally stable, highly luminescent, and biocompatible hybrid nanostructures, expanding their applicability in advanced materials engineering and biotechnological devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117956"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384683","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

Highly stable multirod side-pumped Ce:Nd:YAG solar laser with simultaneous multimode and TEM00-mode emission 高稳定的多棒侧泵浦Ce:Nd:YAG太阳能激光器，同时具有多模和tem00模式发射

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-01-14 DOI: 10.1016/j.optmat.2026.117888

Bruno D. Tibúrcio , Dawei Liang , Hugo Costa , Joana Almeida , Anita Haeussler , Emmanuel Guillot , Cláudia R. Vistas

{"title":"Highly stable multirod side-pumped Ce:Nd:YAG solar laser with simultaneous multimode and TEM00-mode emission","authors":"Bruno D. Tibúrcio , Dawei Liang , Hugo Costa , Joana Almeida , Anita Haeussler , Emmanuel Guillot , Cláudia R. Vistas","doi":"10.1016/j.optmat.2026.117888","DOIUrl":"10.1016/j.optmat.2026.117888","url":null,"abstract":"<div><div>The side-pumping of Ce:Nd:YAG solar lasers provides a more uniform solar light distribution inside the active medium compared to end-side-pumping schemes, enabling the enhancement of laser power and beam profile stability. However, to the best of our knowledge, there is no report on a systematic evaluation of solar laser power and beam profile stability simultaneously, as well as the simultaneous emission of multimode and TEM<sub>00</sub>-mode solar laser beams from the same pump cavity, attractive for laser material processing. Therefore, we present the first multirod side-pumped solar laser at 1064 nm in simultaneous multi-regime operation from a single laser head, with enhanced laser power and beam profile stabilities. The solar laser head was sun-pumped by the heliostat-parabolic system of Procédés Matériaux et Energie Solaire – Centre National de la Recherche Scientifique (PROMES-CNRS). A total solar laser power of 7.3 W was measured, of which 5.2 W solar laser power in multimode and 2.1 W in TEM<sub>00</sub>-mode. Laser power stability was improved by factors of 1.07 and 1.05 for multimode emission and for the total multimode/TEM<sub>00</sub>-mode solar laser emissions, respectively, with enhanced beam profile stability 2.5 times higher, compared to the previous scheme. The highly stable solar laser of this work demonstrated versatility for potential applications in industrial decarbonization, such as multi-beam laser and dynamic beam shaping welding processes.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117888"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145993594","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

Tailoring the first hyperpolarizability of acetamide-chalcone derivatives 裁剪乙酰胺-查尔酮衍生物的第一超极化率

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-01-26 DOI: 10.1016/j.optmat.2026.117921

André G. Pelosi , João V.P. Valverde , Carlos H. dos Santos , EliS.A. Ducas , Pablo J. Gonçalves , Cleber Renato Mendonça , Leonardo De Boni

{"title":"Tailoring the first hyperpolarizability of acetamide-chalcone derivatives","authors":"André G. Pelosi , João V.P. Valverde , Carlos H. dos Santos , EliS.A. Ducas , Pablo J. Gonçalves , Cleber Renato Mendonça , Leonardo De Boni","doi":"10.1016/j.optmat.2026.117921","DOIUrl":"10.1016/j.optmat.2026.117921","url":null,"abstract":"<div><div>We employed the femtosecond laser-induced Hyper-Rayleigh Scattering technique to measure the dispersion of the first-order molecular hyperpolarizability (<span><math><mrow><mi>β</mi></mrow></math></span>) of five acetamide-chalcone derivatives containing different electron-donating groups. Our results show that <span><math><mrow><mi>β</mi></mrow></math></span> strongly depends on the excitation wavelength, exhibiting an approximately sevenfold increase at 750 nm compared to the static value, <span><math><mrow><msub><mi>β</mi><mo>∘</mo></msub></mrow></math></span>. We demonstrated that this effect is the result of two-photon resonance enhancement. We also observed that the <span><math><mrow><mi>β</mi></mrow></math></span> dispersion increases with the electron-donating strength of the substituents, reflecting the intensification of intramolecular charge transfer (ICT) along the π-conjugated system. Both <span><math><mrow><mi>β</mi></mrow></math></span> and the two-photon absorption (2 PA) cross-section show a linear increase with the Hammett constant, reinforcing the central role of ICT in the nonlinear optical response. Furthermore, we employed a phenomenological <em>n</em>-level model (<em>n</em>LM) to fit the experimental <span><math><mrow><mi>β</mi></mrow></math></span> dispersion and compared it with the well-known Sum-Over-States model for 2 PA. Both models showed good agreement, resulting in similar photophysical parameters, demonstrating the consistency of the adopted treatment. Thus, this work elucidates an efficient mechanism for optimizing <span><math><mrow><mi>β</mi></mrow></math></span> in acetamide-chalcone derivatives, combining appropriate molecular functionalization with the selection of the excitation spectral region.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117921"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080308","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

Impact of Nd3+ doping and Au-core separation on plasmon assisted optical gain in TeO2–ZnO pedestal waveguides Nd3+掺杂和au核分离对TeO2-ZnO基波导等离子体辅助光学增益的影响

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-28 DOI: 10.1016/j.optmat.2026.117997

Daniel K. Kumada , Igor Y. Abe , Marcos V.M. Nishimura , Marco I. Alayo , Luciana R.P. Kassab

{"title":"Impact of Nd3+ doping and Au-core separation on plasmon assisted optical gain in TeO2–ZnO pedestal waveguides","authors":"Daniel K. Kumada , Igor Y. Abe , Marcos V.M. Nishimura , Marco I. Alayo , Luciana R.P. Kassab","doi":"10.1016/j.optmat.2026.117997","DOIUrl":"10.1016/j.optmat.2026.117997","url":null,"abstract":"<div><div>This work extends a previous investigation on plasmon enhanced optical gain in Nd<sup>3+</sup> doped TeO<sub>2</sub>-ZnO (TZ) pedestal waveguides incorporating gold nanoparticles (Au NPs) for applications at 1064 nm. The influence of Nd<sup>3+</sup> concentration and the role of a SiO<sub>2</sub> spacer layer on the plasmon assisted optical gain of Nd<sup>3+</sup> doped TZ were investigated. Thin films were deposited by RF magnetron sputtering, with the Nd<sup>3+</sup> concentration controlled by varying the number of Nd<sub>2</sub>O<sub>3</sub> pellets (1, 2, and 3). Pedestal waveguides with heights of ∼3.6 μm and widths ranging from 4 to 40 μm were characterized. Optical gain measurements at 1064 nm under 808 nm excitation showed that the lowest Nd<sub>2</sub>O<sub>3</sub> concentration achieved the highest relative gain (G<sub>R</sub>) with enhancement of up to ∼80% due to Au NPs. Although higher Nd<sup>3+</sup> concentrations led to smaller improvements, attributed to self-absorption and non-radiative losses, the positive role of Au-NPs was observed. The introduction of SiO<sub>2</sub> spacer layers (25 or 100 nm) between the active core and Au NPs completely suppressed the plasmonic enhancement, confirming the importance of adequate distances between the rare-earth ions and the metallic NPs. These findings highlights the critical roles of dopant concentration and nanoscale Au NPs-core separation in maximizing plasmon assisted G<sub>R</sub> in Nd<sup>3+</sup> doped TZ based waveguides, providing guidance for the design of compact and efficient on-chip optical amplifiers.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"174 ","pages":"Article 117997"},"PeriodicalIF":4.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385145","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

Concentration-engineered spray-deposited Si/NiO heterojunctions for self-powered UV photodetection 用于自供电紫外光检测的浓度工程喷涂沉积Si/NiO异质结

IF 4.2 3区材料科学

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-03 DOI: 10.1016/j.optmat.2026.117937

Vidyalakshmi V, Gowrish Rao K, Mahesha M. G

引用次数: 0