Results in Optics最新文献_第6页

Plasmon-enhanced photodetector based on chemical-free laser-synthesized carbon nanofibers decorated with ultralow-concentration gold nanoparticles 基于无化学物质激光合成碳纳米纤维装饰超低浓度金纳米粒子的等离子体增强光电探测器

IF 3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-05-25 DOI: 10.1016/j.rio.2026.101056

Noor luay Hussein AL-Awsaj , Amaal M. Qnewa , Rawa Khalil Ibrahim , Rasha S. Fayadh , Hadeel M. Rasheed , Marwa K. Mustafa , Haider Matrood , Zahraa M. Saleh

{"title":"Plasmon-enhanced photodetector based on chemical-free laser-synthesized carbon nanofibers decorated with ultralow-concentration gold nanoparticles","authors":"Noor luay Hussein AL-Awsaj , Amaal M. Qnewa , Rawa Khalil Ibrahim , Rasha S. Fayadh , Hadeel M. Rasheed , Marwa K. Mustafa , Haider Matrood , Zahraa M. Saleh","doi":"10.1016/j.rio.2026.101056","DOIUrl":"10.1016/j.rio.2026.101056","url":null,"abstract":"<div><div>photodetectors based on laser-synthesized carbon nanofibers (CNFs) decorated with ultralow-concentration gold nanoparticles (AuNPs). Carbon nanostructures were prepared via pulsed laser ablation in liquid (LAL) using a Q-switched Nd:YAG laser (1064 nm), enabling morphology tuning by controlling the pulse without chemical additives or surfactants. To enhance photodetection performance, trace-level AuNPs (0.00001 mM) were integrated onto the CNFs surface, forming a CNFs@AuNPs/p-Si heterojunction. Structural and morphological analyses confirmed the formation of nanofibrous carbon networks with well-dispersed Au nanoparticles. Optical characterization revealed pulse-dependent band gap modulation and pronounced localized surface plasmon resonance (LSPR) of AuNPs. Electrical measurements demonstrated rectifying heterojunction behavior with significantly enhanced photocurrent under illumination. The hybrid CNFs@AuNPs device exhibited improved spectral responsivity (99.6 mA/W at 808 nm), high specific detectivity (1.59 × 10<sup>13</sup> cm·Hz<sup>1</sup>/<sup>2</sup>·W⁻<sup>1</sup>), and external quantum efficiency exceeding 150%. The EQE values above 100% indicate a photoconductive gain mechanism, attributed to plasmon-assisted carrier generation, hot-electron injection from AuNPs, and extended carrier lifetime relative to transit time. Furthermore, the device showed fast and stable photoresponse with sub-second rise and fall times. The simultaneous enhancement of responsivity, detectivity, and temporal response at ultralow Au loading highlights the effectiveness of plasmon-induced carrier engineering in a simple laser-based platform. These results demonstrate a low-complexity, environmentally benign route for developing high-sensitivity carbon-based photodetectors for optoelectronic and sensing applications.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101056"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148167806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gold/vanadium dioxide bilayer for optical modulation upon laser short pulse excitation 激光短脉冲激发光调制的金/二氧化钒双分子层

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-08-03 DOI: 10.1016/j.rio.2026.101113

Francesco Scotognella

引用次数: 0

Simultaneous multi-frame deformation measurement using deep learning with temporal continuity 基于时间连续性的深度学习多帧同步变形测量

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-08-03 DOI: 10.1016/j.rio.2026.101115

Jiao Zhang, Lianpo Wang

{"title":"Simultaneous multi-frame deformation measurement using deep learning with temporal continuity","authors":"Jiao Zhang, Lianpo Wang","doi":"10.1016/j.rio.2026.101115","DOIUrl":"10.1016/j.rio.2026.101115","url":null,"abstract":"<div><div>Digital Image Correlation (DIC) serves as a non-contact optical metrology technique for quantifying object deformation, with widespread deployment in industrial inspection and intelligent manufacturing. Conventional DIC approaches commonly exploit the spatial–temporal continuity of object deformation to boost measurement precision and robustness. While existing deep learning-based DIC methods have effectively leveraged spatial continuity, delivering marked improvements in accuracy, efficiency, and anti-interference capability, they remain limited by underutilization of temporal continuity. Specifically, current DIC networks only take a reference image and a deformed image as input, disregarding historical deformation sequences. To overcome this constraint, this work presents Temporal-DICnet, a sequential-image-input network that incorporates temporal information for multi-frame deformation field estimation. The proposed framework comprises three core modules: a feature encoder that extracts image features and constructs 4D correlation cost volumes between the reference and each deformed frame; a motion encoder that enables inter-frame motion feature propagation and fusion; and a deformation prediction module with convolutional residual blocks used to refine the output deformation field. Experimental results on synthetic datasets reveal that Temporal-DICnet reduces the mean absolute error (MAE) by more than 50% relative to the ALDIC method. Physical uniaxial tensile tests further validate the accuracy and generalization of the proposed network in real-world deformation measurement scenarios.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101115"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148737316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cryo-tunable graphene terahertz antenna with electrostatic reconfigurability and Q-factor enhancement 具有静电可重构性和q因子增强的低温可调谐石墨烯太赫兹天线

IF 3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-06-01 DOI: 10.1016/j.rio.2026.101059

Ritesh Kumar Kushwaha , Niraj Kumar Dewangan

引用次数: 0

Bend-insensitive optical vortex guiding enabled by dual-ring photonic crystal fiber engineering 双环光子晶体光纤工程实现弯曲不敏感光涡旋引导

IF 3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-05-27 DOI: 10.1016/j.rio.2026.101060

Arabinda Mandal , Ardhendu Sekhar Patra , Bibhatsu Kuiri

{"title":"Bend-insensitive optical vortex guiding enabled by dual-ring photonic crystal fiber engineering","authors":"Arabinda Mandal , Ardhendu Sekhar Patra , Bibhatsu Kuiri","doi":"10.1016/j.rio.2026.101060","DOIUrl":"10.1016/j.rio.2026.101060","url":null,"abstract":"<div><div>This work presents a detailed numerical analysis of a Bend-Insensitive Dual-Ring OAM Photonic Crystal Fiber (BIDRO-PCF) engineered for stable guidance of HE<sub>m,1</sub> and OAM-like modes. The fiber incorporates a hollow core surrounded by two high-index functional rings of LiNbO<sub>3</sub> and B<sub>2</sub>O<sub>3</sub>-modified silica, embedded within a silica PCF lattice. Simulations across 1.32–1.62 μm band show that all guided modes maintain effective indices in the 2.080–2.123 range with modal separation below 0.01, while the imaginary part of the index remains on the order of 10<sup>−10</sup>, confirming low intrinsic loss. The effective area increases from 31.9 to 35.1 μm<sup>2</sup> over the band, corresponding to nonlinear coefficients decreasing from 3.88 to 3.03 W<sup>−</sup><sup>1</sup> km<sup>−1</sup>. Dispersion calculations reveal strictly normal behaviour, with chromatic dispersion varying from, 95 to 33 ps nm<sup>−1</sup> km<sup>−1</sup> and higher-order terms β<sub>2</sub>, β<sub>3</sub>, and β<sub>4</sub> following smooth, well-structured trends. Bend modelling demonstrates strong robustness, bend-modified effective index remains near 2.092 for radii <span><math><mrow><msub><mi>R</mi><mi>B</mi></msub><mo>≥</mo><mn>3</mn></mrow></math></span> cm, and significant distortion appears only at extreme curvature, where <span><math><mrow><msub><mi>R</mi><mi>B</mi></msub><mo>=</mo><mn>0.01</mn></mrow></math></span> cm produces n<sub>eff</sub> values up to 2.167 for higher-order modes. These results confirm that the BIDRO-PCF supports stable multi-mode and OAM-compatible operation with high bend tolerance, making it suitable for advanced optical communication and nonlinear photonic applications.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101060"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148167807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Switchable dual-, triple- and four-wavelength Nd:SRA laser on the 4F3/2 → 4I13/2 transition 可切换双、三、四波长Nd:SRA激光器在4F3/2→4I13/2跃迁

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-07-11 DOI: 10.1016/j.rio.2026.101084

Chu Chu, Zhenhua Du, Nguyentuan Anh, Yuzhao Li

引用次数: 0

Design and ANN-based optimization of a photonic crystal half adder using air holes in a silicon substrate 利用硅衬底空气孔的光子晶体半加法器的设计及基于人工神经网络的优化

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-06-24 DOI: 10.1016/j.rio.2026.101063

Fawwaz Hazzazi, Salah I. Yahya, Maher Assaad, Fawnizu Azmadi Hussin, Saeed Roshani, Sobhan Roshani

{"title":"Design and ANN-based optimization of a photonic crystal half adder using air holes in a silicon substrate","authors":"Fawwaz Hazzazi, Salah I. Yahya, Maher Assaad, Fawnizu Azmadi Hussin, Saeed Roshani, Sobhan Roshani","doi":"10.1016/j.rio.2026.101063","DOIUrl":"10.1016/j.rio.2026.101063","url":null,"abstract":"<div><div>This paper presents a compact all-optical half adder based on a two-dimensional photonic crystal with air holes in a silicon substrate. Compared with traditional rod-in-air structures, the proposed design is easier to fabricate using CMOS technology, offers better integration potential, and reduces device footprint. Finite-difference time-domain (FDTD) simulations confirm high performance, with a contrast ratio (CR) of 9.89 dB, a response time of 0.48 ps, and a bit rate of 2 Tb/s, outperforming several previously reported designs by achieving high bit rate, small footprint, and good CR. To optimize the structural parameters R<sub>1</sub> and R<sub>2</sub>, which represent the defect holes radii, an artificial neural network (ANN) was trained as a surrogate model to predict the sum of squared error (SSE) between the simulated and ideal logic outputs. The ANN effectively captured the nonlinear relationship between structural parameters and device error, enabling rapid generation of error surfaces and contour maps without repeated full-wave simulations.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101063"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation of the theoretical efficiency limits of CTS (Cu₂SnS₃) solar cells via SCAPS-1D simulation CTS （Cu₂SnS₃）太阳能电池理论效率极限的SCAPS-1D模拟数值研究

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-07-01 DOI: 10.1016/j.rio.2026.101078

Md. Fardous Hasan Bappy, Abdullah-Al-Mazed Khan, Md. Rasel Islam, Md. Saiful Islam Shanto, Md Emran Hossain

{"title":"Numerical investigation of the theoretical efficiency limits of CTS (Cu₂SnS₃) solar cells via SCAPS-1D simulation","authors":"Md. Fardous Hasan Bappy, Abdullah-Al-Mazed Khan, Md. Rasel Islam, Md. Saiful Islam Shanto, Md Emran Hossain","doi":"10.1016/j.rio.2026.101078","DOIUrl":"10.1016/j.rio.2026.101078","url":null,"abstract":"<div><div>Copper Tin Sulfide (CTS) is a promising earth-abundant, non-toxic, and sustainable chalcogenide absorber for next-generation thin-film photovoltaics. Despite its potential, experimental CTS-based solar cells currently face efficiency bottlenecks often attributed to interface recombination and suboptimal band alignment. This study presents a comprehensive numerical investigation into the theoretical performance limits of a fully inorganic heterojunction architecture: ITO/SnO₂/Cu₂SnS₃/Cu₂O/Ni using SCAPS-1D simulation. By systematically optimizing the absorber layer thickness, carrier concentration, and interface defect densities, we establish a roadmap for achieving high-performance CTS devices. Under idealized conditions, including passivated interfaces (defect density of 10<sup>14</sup> cm<sup>−2</sup>) and optimized band offsets, the device achieves a theoretical power conversion efficiency (PCE) of 26.10%, with an open-circuit voltage (Voc) of 0.85 V, short-circuit current density (Joc) of 37.00 mA·cm<sup>−2</sup>, and a fill factor (FF) of 82.90% at a 700 nm absorber thickness. The quantum efficiency remains above 90% across the 300–900 nm spectral range, indicating excellent carrier collection potential. These results represent the upper-bound performance limits of CTS solar cells and highlight that rigorous control of interface recombination and absorber doping is essential to bridging the gap between current experimental outputs and theoretical potential.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101078"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Collective-variable analysis of coupled plasmonic mode dynamics in one-dimensional waveguides 一维波导中耦合等离子体模动力学的集体变量分析

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-06-30 DOI: 10.1016/j.rio.2026.101069

Mamta Kapoor

引用次数: 0

Free space to MIM slit plasmonic waveguide coupling via a quarter-wavelength impedance transformer 自由空间与MIM狭缝等离子波导耦合通过四分之一波长阻抗变压器

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-07-31 DOI: 10.1016/j.rio.2026.101102

Jeong Gyu Lee, Yash Trivedi, Anna Lee, Aftab Ahmed

{"title":"Free space to MIM slit plasmonic waveguide coupling via a quarter-wavelength impedance transformer","authors":"Jeong Gyu Lee, Yash Trivedi, Anna Lee, Aftab Ahmed","doi":"10.1016/j.rio.2026.101102","DOIUrl":"10.1016/j.rio.2026.101102","url":null,"abstract":"<div><div>The power transfer through a slit in a thick gold film has found significant applications such as ultra high-speed modulators, nonlinear optics, and sensing. However, this transfer in plasmonic waveguides is limited by the reflection of light at the surface and inherent losses in the material. Here, we demonstrate an impedance matching approach based on a quarter-wavelength transformer to improve coupling of free-space light into a metal-insulator-metal slit waveguide, by suppressing reflection near the design wavelength. We couple an analytical model for maximum transmission in a single slit with a quarter-wavelength impedance matching cavity, enabling up to over 60% enhancement of transmission from the optimized single slit. The calculations for impedance matching are analogous to traditional transmission line theory, allowing for straightforward and rapid transmission enhancement. This analysis provides physical insight into funneling light through plasmonic slit waveguides for potential optical communications and field enhancement-based sensing applications. Applying this design framework to choose linear taper angles maintains comparable transmission while easing fabrication constraints.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101102"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148737317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0