Photonics and Nanostructures-Fundamentals and Applications最新文献

Unveiling the potential of non-toxic Ge based perovskite material for all inorganic solar cells using multiple ETLs 揭示了无毒的Ge基钙钛矿材料在使用多个etl的所有无机太阳能电池中的潜力

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-07-08 DOI: 10.1016/j.photonics.2025.101425

Fozlur Rayhan , Md Hamidur Rahman , Sohel Rana , Dipika Das Ria , Jannati Islam Chy , Md Shakib Hosen , Tanzir Ahamed , Jerry Sarpong , Kelly Yegbe , Md Shihab Uddin

{"title":"Unveiling the potential of non-toxic Ge based perovskite material for all inorganic solar cells using multiple ETLs","authors":"Fozlur Rayhan , Md Hamidur Rahman , Sohel Rana , Dipika Das Ria , Jannati Islam Chy , Md Shakib Hosen , Tanzir Ahamed , Jerry Sarpong , Kelly Yegbe , Md Shihab Uddin","doi":"10.1016/j.photonics.2025.101425","DOIUrl":"10.1016/j.photonics.2025.101425","url":null,"abstract":"<div><div>This study optimizes all-inorganic Pb-free CsGeI<sub>3</sub>-based perovskite solar cells. CsGeI<sub>3</sub> forms four structures with four electron transport layers (ZnOS, BaSnO<sub>3</sub>, PC<sub>61</sub>BM, and ZnSe) and one hole transport layer of Copper Tin Ferrite Sulfide (CFTS). The thickness of the absorber layer is optimized by assessing the effects of the electron transport layer and hole transport layer thicknesses, along with the acceptor and defect densities in the absorbers, donor and defect densities in the electron transport layers, and acceptor and defect densities in the hole transport layers. After optimization, the FTO/ZnOS/CsGeI<sub>3</sub>/CFTS/Au configuration achieved optimal performance with a <em>V</em><sub>OC</sub> of 1.07 V, <em>J</em><sub>SC</sub> of 24.39 mA/cm², FF of 82.49 % and efficiency of 21.72 %. The influences of series and shunt resistance, temperature, voltage-current density, quantum efficiency, and generation and recombination rates are examined to determine structural stability. This study aims to improve understanding of CsGeI<sub>3</sub>-based perovskite solar cell’s experimental research potential.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101425"},"PeriodicalIF":2.5,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inter-mode backward stimulated Brillouin scattering in lithium niobate core fiber 铌酸锂芯光纤中的模间反向受激布里渊散射

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-07-06 DOI: 10.1016/j.photonics.2025.101426

Yafei Hou , Wenjun He , Songquan Yan , Zepeng Wu , Yi Liu , Yajun You , Jian He , Xiujian Chou

{"title":"Inter-mode backward stimulated Brillouin scattering in lithium niobate core fiber","authors":"Yafei Hou , Wenjun He , Songquan Yan , Zepeng Wu , Yi Liu , Yajun You , Jian He , Xiujian Chou","doi":"10.1016/j.photonics.2025.101426","DOIUrl":"10.1016/j.photonics.2025.101426","url":null,"abstract":"<div><div>Brillouin sensing in multimode optical fibre enables the simultaneous modal transmission of multiple modulus, such as temperature and strain, and helps to promote the development of simultaneous multi-property sensing techniques. Among these, intermodal backward Brillouin scattering induced by higher order modes (HOMs) is of great importance for understanding the phonon-photon interaction in multimode fibre. In addition, lithium niobate (LiNbO<sub>3</sub>) materials have potential applications in sensing due to their excellent electro-optical properties, which are expected to provide higher sensitivity and accuracy. In this paper, the inter-mode BSBS induced by higher order optical modes in micron scale LiNbO<sub>3</sub> optical fibre is investigated. The inter-mode excited Brillouin scattering characteristics of the first 10 LP modes in the fibre are simulated and analysed by finite element simulation. During backward Brillouin scattering, several longitudinal acoustic modes (LAMs) are excited. However, only a few specific low-order LAMs are involved in the interaction between different optical mode pairs, resulting in Brillouin amplification. In this paper, we elucidate the differences in the gain characteristics of the Brillouin gain spectra between different modes and reveal the acoustic mode law that contributes most to the BGS in the inter-mode BSBS. The results show that both the effective refractive index (2.1847–2.2072) and the Brillouin scattering frequency shift (20.6–20.9 GHz) decrease with the increase of mode order in this structure. And the Brillouin gain reaches 0.4244 m<sup>−1</sup>·W<sup>−1</sup>, which is a significant improvement compared with the conventional SiO<sub>2</sub> fiber, predicting the improvement of sensitivity in sensing.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101426"},"PeriodicalIF":2.5,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on light absorption efficiency of P3HT:PCBM-based solar cells improved by triple grating structure 三光栅结构提高P3HT: pcbm基太阳能电池光吸收效率的研究

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-06-27 DOI: 10.1016/j.photonics.2025.101380

Ruijie Xie , Aodi Shi , Fanghao Shui , Hengdi Wang , Xiaokang Yang

{"title":"Research on light absorption efficiency of P3HT:PCBM-based solar cells improved by triple grating structure","authors":"Ruijie Xie , Aodi Shi , Fanghao Shui , Hengdi Wang , Xiaokang Yang","doi":"10.1016/j.photonics.2025.101380","DOIUrl":"10.1016/j.photonics.2025.101380","url":null,"abstract":"<div><div>In this paper, a novel triple-layer grating structure is proposed to improve light absorption efficiency of P3HT:PCBM-based solar cell. The periodic Ag grating is fabricated at bottom of P3HT:PCBM photosensitive layer and Ag electrode to excite surface plasmons (SPs). The excited SPs can greatly enhance electromagnetic field intensity around Ag grating, which can improve chance and efficiency of interaction between photons and photosensitive layer, and enhance light absorption efficiency of solar cell. The periodic indium tin oxide (ITO) grating and PEDOT:PSS grating is fabricated by etching rectangular grooves on top of ITO layer and depositing PEDOT:PSS layer. The light-trapping effect generated by grating allows light to be reflected and refracted multiple times inside solar cell, which can further increase chance of interaction between photons and photosensitive layer, and enhance light absorption efficiency of solar cell. The COMSOL software is used to simulate and optimize parameters of the novel structure. The light reflectivity, light transmissivity and metal absorption loss of photons at different structural parameters are obtained, and the light absorption efficiency is calculated. The simulation results show that light absorption efficiency of the novel structure is almost above 90 % at wavelength range of 400–500 nm in TM mode and almost above 90 % at wavelength range of 450–500 nm in TE mode. This research provides a reliable foundation for development of the novel P3HT:PCBM-based solar cell with high light absorption efficiency.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101380"},"PeriodicalIF":2.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of robust topological edge states clock-shaped multiplexer in anisotropic photonic crystals enhanced by neural networks 神经网络增强各向异性光子晶体鲁棒拓扑边缘态时钟型多路复用器的设计

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-06-15 DOI: 10.1016/j.photonics.2025.101423

Hang Sun , Zheng-Da Hu , Jingjing Wu , Jicheng Wang

{"title":"Design of robust topological edge states clock-shaped multiplexer in anisotropic photonic crystals enhanced by neural networks","authors":"Hang Sun , Zheng-Da Hu , Jingjing Wu , Jicheng Wang","doi":"10.1016/j.photonics.2025.101423","DOIUrl":"10.1016/j.photonics.2025.101423","url":null,"abstract":"<div><div>Topological edge states have demonstrated significant potential in controlling light propagation. This paper presents a high-degree anisotropic photonic crystal based on a combination of convolutional and fully connected neural networks. The model accurately predicts the asymmetry parameters and band structure in both directions. We achieve topological edge state transmission over a broader frequency range compared to traditional valley photonic crystal array channels. We precisely predict accurate results for both wide-frequency boundary state outputs and topological bandgaps. We design a clock-shaped wavelength division multiplexer to enable precise optical channel selection. Our deep learning model demonstrates robust performance against input variations, and the structure remains highly resilient to disturbances. The deep learning-assisted anisotropic structure demonstrates precise selectivity, wideband high-intensity transmission and strong robustness in topological edge states significantly enhancing the application potential and development efficiency of topological edge states.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101423"},"PeriodicalIF":2.5,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-resolution fiber laser sensor for strain and temperature measurements using matrix demodulation 高分辨率光纤激光传感器应变和温度测量使用矩阵解调

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-06-13 DOI: 10.1016/j.photonics.2025.101421

Shaoyu Jia , Lida Li , Mingjian Ma , Shuguang Li , Hailiang Chen

{"title":"High-resolution fiber laser sensor for strain and temperature measurements using matrix demodulation","authors":"Shaoyu Jia , Lida Li , Mingjian Ma , Shuguang Li , Hailiang Chen","doi":"10.1016/j.photonics.2025.101421","DOIUrl":"10.1016/j.photonics.2025.101421","url":null,"abstract":"<div><div>Structural health monitoring demands high-resolution and demodulation measurements of strain and temperature simultaneously. Here, we propose an erbium-doped fiber ring laser (EDFRL) which is integrated with a polarization maintaining fiber inserted Sagnac interferometer (PMF-SI) and a fiber Bragg grating (FBG) to achieve this purpose. Leveraging the narrow full width at half maximum (FWHM) and high coherence of the EDFRL, the proposed sensor achieves ultrahigh resolution (<em>R</em>) of 0.015 °C for temperature measurement and 1.96 με for strain measurement respectively, surpassing most reported fiber laser-based sensors. A matrix is utilized to decouple the cross-sensitivity between temperature and strain owing to the e differential responses of PMF-SI and FBG. The detection errors are < 0.183 °C for temperature measurement and < 15 με for strain measurement, respectively. Owing to the high-resolution and decoupling method, the proposed sensor can measure temperature and strain simultaneously with good performance.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101421"},"PeriodicalIF":2.5,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Switchable fractional perfect composite vortex encryption based on double-layer metasurface 基于双层超表面的可切换分数完美复合涡旋加密

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-06-12 DOI: 10.1016/j.photonics.2025.101422

Zhenyuan Wang , Heyang Qin , Zheng-Da Hu , Wenyuan Wang , Tianhang Chen , Jingjing Wu , Jicheng Wang

{"title":"Switchable fractional perfect composite vortex encryption based on double-layer metasurface","authors":"Zhenyuan Wang , Heyang Qin , Zheng-Da Hu , Wenyuan Wang , Tianhang Chen , Jingjing Wu , Jicheng Wang","doi":"10.1016/j.photonics.2025.101422","DOIUrl":"10.1016/j.photonics.2025.101422","url":null,"abstract":"<div><div>We propose a double-layer metasurface to realize the polarization switching of fractional perfect composite vortex beams (FPCVBs). The metasurface is designed by the Jones matrix formalism and optimized through the “Random Forest” machine learning algorithm, achieving high polarization switching efficiency. The grafted-FPCVBs are presented with featuring multivariate topological charges, and double-ring FPCVBs are achieved with independent on/off modulation and shaping transformation of inner and outer ring intensities. These capabilities unlock orbital angular momentum density modulation and light field reconfiguration in composited light architectures. Moreover, we design an optical encryption protocol inspired by the hierarchical structure of chinese characters, where semantic radicals are mapped to polarization-encoded FPCVBs. These innovations present significant potential for applications in optical information security, particle manipulation, and next-generation photonic communications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101422"},"PeriodicalIF":2.5,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Model and effect of backscattering on mode splitting in optical circular cavity 光学圆腔中后向散射对模式分裂的模型及影响

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-06-11 DOI: 10.1016/j.photonics.2025.101420

Kangyong Hu, Jingtong Duan, Yameng Xu, Xin Liu, Mei Kong

引用次数: 0

Perfect absorber based on toroidal dipole in metamaterial of silicon and gallium phosphide 基于硅和磷化镓超材料环向偶极子的完美吸收体

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-06-08 DOI: 10.1016/j.photonics.2025.101410

Xiaoyun Wang , Sili Huang , Yan Chen , Shanjun Chen , Wei Dai , Jie Hou , Jingyu Wang , Weimin Yang , Shiyi Song

引用次数: 0

Optical fiber localized surface plasmon resonance sensor based on dense gold trisoctahedra 基于致密金三八面体的光纤局域表面等离子体共振传感器

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-06-07 DOI: 10.1016/j.photonics.2025.101411

Yu Shi, Zecheng Wei, Gengshuo Ran, Rong Zhang, Mei Kong, Meiling Zhang

{"title":"Optical fiber localized surface plasmon resonance sensor based on dense gold trisoctahedra","authors":"Yu Shi, Zecheng Wei, Gengshuo Ran, Rong Zhang, Mei Kong, Meiling Zhang","doi":"10.1016/j.photonics.2025.101411","DOIUrl":"10.1016/j.photonics.2025.101411","url":null,"abstract":"<div><div>Tuning the plasmonic coupling of noble metal nanoparticles is important for improving the sensitivity and performance of localized surface plasmon resonance (LSPR) sensing. Combining the excellent LSPR performance of gold trisoctahedra (Au TOH) with unique tips, a novel optical fiber LSPR sensor was prepared by uniformly and densely assembling Au TOH on optical fiber using liquid-liquid interface self-assembly method. This method allows for the non-destructive transfer of pre-prepared dense Au TOH monolayer film onto optical fiber in a simple and time-saving manner. The LSPR characteristics of Au TOH on optical fiber with different spacing were simulated by the finite difference time domain (FDTD). Expectedly, the decreasing of the Au TOH spacing can enhance the local electric field strength, and leads to LSPR peak broadening, resonance wavelength redshift, and improving the sensing sensitivity. Meanwhile, the nanoparticle gap of the practically prepared optical fiber LSPR sensor was approximately 5 nm, and such narrow gap ensures the sensitivity of sensor based on the theoretical simulation results. Furthermore, the detection of sucrose solutions with different concentrations was successfully achieved based on the sensor combined with microfluidic technology, with the highest sensitivity up to 200.67 nm/RIU. The remarkable performance and simple preparation strategy make this optical fiber LSPR sensor own excellent potentials for highly sensitive and cost-effective biomedical sensing applications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101411"},"PeriodicalIF":2.5,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization strategy of ultra-compact metasurface-based filter ordering on sensors for improved spectral retrieval 基于超紧凑超表面的传感器滤波排序优化策略，提高光谱检索效率

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-06-03 DOI: 10.1016/j.photonics.2025.101409

Trideeb Bhattacharya , Marie-Anne Burcklen , Mathilde Larché , Mondher Besbes , S. Ram Prakash , Stéphane Monfray , Henri Benisty

{"title":"Optimization strategy of ultra-compact metasurface-based filter ordering on sensors for improved spectral retrieval","authors":"Trideeb Bhattacharya , Marie-Anne Burcklen , Mathilde Larché , Mondher Besbes , S. Ram Prakash , Stéphane Monfray , Henri Benisty","doi":"10.1016/j.photonics.2025.101409","DOIUrl":"10.1016/j.photonics.2025.101409","url":null,"abstract":"<div><div>CMOS technologies can provide miniature filters with few-nm passband in the visible, much suited to on-chip spectrometers and hyperspectral imaging. However, crosstalk can become challenging and degrade spectral retrieval at the smallest sizes. A filter/metasurface bank design is a first demanding step for this scope, playing with in-plane patterns/“atoms”. For a miniature device of 10–100 small pixels, each 1–3 <em>μ</em>m wide, the filters finite extent incurs an extra penalty: cross-talk between neighbor pixels, hard to minimize through electromagnetic tools. A distinct and useful minimization suited to the CMOS context is then to select the arrangement of <em>N</em> filters on the array to privilege the less penalizing neighbor pairs. This amounts to a path selection problem in the <em>N</em>×(<em>N</em>−1) space of the inter-micro-filter cross-talks. We evaluate the resulting benefit in terms of the condition number of the system’s spectral function matrix, the basic ingredient for spectral retrieval. In one dimension, we find that small arrays can be tackled by brute force up to <em>N</em>∼15 filters, but a minimization through a simply weighted proxy, a summed cross-talk combination, is more advantageous beyond. In two-dimensions, the topology only partly changes the trend. Relevant examples of infinite and finite filters based on amorphous silicon and silica are also provided to justify the choice of a rather broad cross-talk distribution in the inter-filter space. Gains of <em>c</em><sup>−1</sup>∕〈<em>c</em><sup>−1</sup>〉=1.5–2.5 on the inverse of the condition number <em>c</em> (and thus the accuracy of spectral retrieval) emerge from the study.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101409"},"PeriodicalIF":2.5,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0