Pub Date : 2025-06-15DOI: 10.1016/j.photonics.2025.101423
Hang Sun , Zheng-Da Hu , Jingjing Wu , Jicheng Wang
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.
{"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}
Pub Date : 2025-06-13DOI: 10.1016/j.photonics.2025.101421
Shaoyu Jia , Lida Li , Mingjian Ma , Shuguang Li , Hailiang Chen
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 (R) 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.
{"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}
Pub Date : 2025-06-12DOI: 10.1016/j.photonics.2025.101422
Zhenyuan Wang , Heyang Qin , Zheng-Da Hu , Wenyuan Wang , Tianhang Chen , Jingjing Wu , Jicheng Wang
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.
{"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}
Pub Date : 2025-06-11DOI: 10.1016/j.photonics.2025.101420
Kangyong Hu, Jingtong Duan, Yameng Xu, Xin Liu, Mei Kong
In optical circular cavities, backscattering due to refractive index inhomogeneity and sidewall roughness can cause degenerate resonant modes to split. In this paper, a steady-state field model for circular cavities with backscattering is established and solved. The splitting conditions of the reflection and the transmission spectra and for obvious splitting are discussed. The proposed analytical model and the obtained mode splitting conditions are concise and feasible, which will provide great convenience to the evaluation or anticipation of the backscattering-induced mode splitting. The insights provided by this paper will also serve as a valuable reference for circular resonators of other configurations.
{"title":"Model and effect of backscattering on mode splitting in optical circular cavity","authors":"Kangyong Hu, Jingtong Duan, Yameng Xu, Xin Liu, Mei Kong","doi":"10.1016/j.photonics.2025.101420","DOIUrl":"10.1016/j.photonics.2025.101420","url":null,"abstract":"<div><div>In optical circular cavities, backscattering due to refractive index inhomogeneity and sidewall roughness can cause degenerate resonant modes to split. In this paper, a steady-state field model for circular cavities with backscattering is established and solved. The splitting conditions of the reflection and the transmission spectra and for obvious splitting are discussed. The proposed analytical model and the obtained mode splitting conditions are concise and feasible, which will provide great convenience to the evaluation or anticipation of the backscattering-induced mode splitting. The insights provided by this paper will also serve as a valuable reference for circular resonators of other configurations.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101420"},"PeriodicalIF":2.5,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144288824","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}
Pub Date : 2025-06-08DOI: 10.1016/j.photonics.2025.101410
Xiaoyun Wang , Sili Huang , Yan Chen , Shanjun Chen , Wei Dai , Jie Hou , Jingyu Wang , Weimin Yang , Shiyi Song
In this work, we propose a metamaterial perfect absorber based on the toroidal dipole mode. A nanopore is introduced in the center of GaP nanopixel, and a Si nanodisk is placed in it as the pattern layer. The dielectric layer comprising of SiO2 is on top of the substrate of Au. The finite difference time domain (FDTD) method was used to numerically simulate the metamaterial absorber, in which the absorption peak appeared at 1255.3 nm with a peak value of 99.6 % and a Q factor of 154.4. This study also demonstrated the high sensitivity of 339.6 nm/RIU to the environmental refractive index, surpassing previously reported designs and highlighting the potential applications of refractive index sensing. The proposed composite structure narrowband absorber based on Si and GaP has great application potential in perfect absorption, refractive index sensing and nonlinear photonics.
{"title":"Perfect absorber based on toroidal dipole in metamaterial of silicon and gallium phosphide","authors":"Xiaoyun Wang , Sili Huang , Yan Chen , Shanjun Chen , Wei Dai , Jie Hou , Jingyu Wang , Weimin Yang , Shiyi Song","doi":"10.1016/j.photonics.2025.101410","DOIUrl":"10.1016/j.photonics.2025.101410","url":null,"abstract":"<div><div>In this work, we propose a metamaterial perfect absorber based on the toroidal dipole mode. A nanopore is introduced in the center of GaP nanopixel, and a Si nanodisk is placed in it as the pattern layer. The dielectric layer comprising of SiO<sub>2</sub> is on top of the substrate of Au. The finite difference time domain (FDTD) method was used to numerically simulate the metamaterial absorber, in which the absorption peak appeared at 1255.3 nm with a peak value of 99.6 % and a Q factor of 154.4. This study also demonstrated the high sensitivity of 339.6 nm/RIU to the environmental refractive index, surpassing previously reported designs and highlighting the potential applications of refractive index sensing. The proposed composite structure narrowband absorber based on Si and GaP has great application potential in perfect absorption, refractive index sensing and nonlinear photonics.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101410"},"PeriodicalIF":2.5,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291648","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}
Pub Date : 2025-06-07DOI: 10.1016/j.photonics.2025.101411
Yu Shi, Zecheng Wei, Gengshuo Ran, Rong Zhang, Mei Kong, Meiling Zhang
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.
{"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}
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 μm 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 N filters on the array to privilege the less penalizing neighbor pairs. This amounts to a path selection problem in the N×(N−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 N∼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 c−1∕〈c−1〉=1.5–2.5 on the inverse of the condition number c (and thus the accuracy of spectral retrieval) emerge from the study.
{"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}
Pub Date : 2025-06-03DOI: 10.1016/j.photonics.2025.101408
Alexey Zhizhchenko , Artem Cherepakhin , Eugeny Mitsai , Xiaoqiang Li , Xianshao Zou , Yuri Mezenov , Aleksandr A. Kuchmizhak , Sergey Makarov
Laser ablation of halide perovskites is a powerful tool for precise nanopatterning and formation of various nanophotonic designs supporting unique optical properties or lasing. In this study, we investigate the polarization-dependent effects in femtosecond laser ablation of halide perovskites, providing experimental evidence of their non-symmetrical nanostructuring. Through systematic analysis supported by optical simulations, we demonstrate that the shape of the ablated craters evolving under multi-pulse irradiation exhibits a pronounced dependence on the laser polarization, leading to anisotropic material removal. Our simulations and experiments also reveal that the asymmetric energy deposition due to local redistribution of the absorbed laser energy profile plays a critical role during surface scanning by the laser beam, affecting the resulting track morphology. As a result, we justify the optimal nanostructuring regimes allowing the quasi-uniform and gear-shaped perovskite microdisks to imprint upon them supporting low-threshold lasing upon optical excitation. Our findings provide new insights into laser-matter interactions in halide perovskites and open possibilities for controlled laser nanostructuring of optoelectronic materials.
{"title":"Polarization-dependent direct laser nanostructuring of halide perovskites","authors":"Alexey Zhizhchenko , Artem Cherepakhin , Eugeny Mitsai , Xiaoqiang Li , Xianshao Zou , Yuri Mezenov , Aleksandr A. Kuchmizhak , Sergey Makarov","doi":"10.1016/j.photonics.2025.101408","DOIUrl":"10.1016/j.photonics.2025.101408","url":null,"abstract":"<div><div>Laser ablation of halide perovskites is a powerful tool for precise nanopatterning and formation of various nanophotonic designs supporting unique optical properties or lasing. In this study, we investigate the polarization-dependent effects in femtosecond laser ablation of halide perovskites, providing experimental evidence of their non-symmetrical nanostructuring. Through systematic analysis supported by optical simulations, we demonstrate that the shape of the ablated craters evolving under multi-pulse irradiation exhibits a pronounced dependence on the laser polarization, leading to anisotropic material removal. Our simulations and experiments also reveal that the asymmetric energy deposition due to local redistribution of the absorbed laser energy profile plays a critical role during surface scanning by the laser beam, affecting the resulting track morphology. As a result, we justify the optimal nanostructuring regimes allowing the quasi-uniform and gear-shaped perovskite microdisks to imprint upon them supporting low-threshold lasing upon optical excitation. Our findings provide new insights into laser-matter interactions in halide perovskites and open possibilities for controlled laser nanostructuring of optoelectronic materials.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101408"},"PeriodicalIF":2.5,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241074","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}
Pub Date : 2025-05-30DOI: 10.1016/j.photonics.2025.101405
Renat Sh. Ikhsanov , Igor V. Smetanin , Igor E. Protsenko , Alexander V. Uskov
A model has been developed to calculate the Tamm quasi-level in metal-semiconductor structures with Schottky barrier. The model was used to show that electron resonance tunneling from metal to semiconductor through the Schottky barrier can occur with the Tamm quasi-level at the metal-semiconductor interface. The resonance tunneling with the Tamm quasi-level can strongly affect the electron photoemission in plasmonic structures from the metal to the surrounding semiconductor, lowering the red limit of the photoeffect and significantly increasing the internal quantum efficiency of photoemission and the quantum yield of hot carrier generation in plasmonic structures, especially for photochemistry (photocatalysis).
{"title":"Effects of Tamm state on electron tunneling through Schottky barrier and on bulk electron photoemission in metal-semiconductor nanostructures","authors":"Renat Sh. Ikhsanov , Igor V. Smetanin , Igor E. Protsenko , Alexander V. Uskov","doi":"10.1016/j.photonics.2025.101405","DOIUrl":"10.1016/j.photonics.2025.101405","url":null,"abstract":"<div><div>A model has been developed to calculate the Tamm quasi-level in metal-semiconductor structures with Schottky barrier. The model was used to show that electron resonance tunneling from metal to semiconductor through the Schottky barrier can occur with the Tamm quasi-level at the metal-semiconductor interface. The resonance tunneling with the Tamm quasi-level can strongly affect the electron photoemission in plasmonic structures from the metal to the surrounding semiconductor, lowering the red limit of the photoeffect and significantly increasing the internal quantum efficiency of photoemission and the quantum yield of hot carrier generation in plasmonic structures, especially for photochemistry (photocatalysis).</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"65 ","pages":"Article 101405"},"PeriodicalIF":2.5,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196188","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}
Pub Date : 2025-05-30DOI: 10.1016/j.photonics.2025.101406
Narjes Kheirabadi , YuanDong Wang
The Berry curvature dipole is well-known to cause Hall conductivity. This study expands on previous results to demonstrate how two- and three-dimensional materials react under a tilted magnetic field in the linear and nonlinear regimes. We show how the Hall effect has a quantum origin by deriving the general form of intrinsic and extrinsic currents in materials under a tilted magnetic field. Our focus is on determining the linear and nonlinear response of two-dimensional materials. We also demonstrate that as a result of the perpendicular component of the magnetic field, a current originating from both velocity and Berry curvature can occur in two-dimensional materials and topological crystalline insulators in second harmonic generation and ratchet responses. The findings of this research may provide insight into the transport characteristics of materials in the semi-classical regime and the linear and nonlinear Hall effects.
{"title":"General solution for the response of materials under radiation and tilted magnetic field: Semi-classical regime","authors":"Narjes Kheirabadi , YuanDong Wang","doi":"10.1016/j.photonics.2025.101406","DOIUrl":"10.1016/j.photonics.2025.101406","url":null,"abstract":"<div><div>The Berry curvature dipole is well-known to cause Hall conductivity. This study expands on previous results to demonstrate how two- and three-dimensional materials react under a tilted magnetic field in the linear and nonlinear regimes. We show how the Hall effect has a quantum origin by deriving the general form of intrinsic and extrinsic currents in materials under a tilted magnetic field. Our focus is on determining the linear and nonlinear response of two-dimensional materials. We also demonstrate that as a result of the perpendicular component of the magnetic field, a current originating from both velocity and Berry curvature can occur in two-dimensional materials and topological crystalline insulators in second harmonic generation and ratchet responses. The findings of this research may provide insight into the transport characteristics of materials in the semi-classical regime and the linear and nonlinear Hall effects.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101406"},"PeriodicalIF":2.5,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212809","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号