Photonics and Nanostructures-Fundamentals and Applications最新文献_第5页

High-precision alcohol sensing using twin core photonic crystal fiber 基于双芯光子晶体光纤的高精度酒精传感

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2024.101348

Vikash Mourya , Sapana Yadav , Pooja Lohia , Adarsh Chandra Mishra , D.K. Dwivedi , Upendra Kulshrestha

{"title":"High-precision alcohol sensing using twin core photonic crystal fiber","authors":"Vikash Mourya , Sapana Yadav , Pooja Lohia , Adarsh Chandra Mishra , D.K. Dwivedi , Upendra Kulshrestha","doi":"10.1016/j.photonics.2024.101348","DOIUrl":"10.1016/j.photonics.2024.101348","url":null,"abstract":"<div><div>A novel twin-core photonic crystal fiber (TC-PCF) sensor for alcohol detection has been introduced that specifically targets ethanol, propanol, butanol and pentanol. The sensor utilizes silica as a substrate material with circular air holes in the cladding region and operates between 2 µm and 3 µm range of wavelength. Simulations and evaluations are performed on COMSOL Multiphysics software interface. The twin core structure of this sensor contributes to its enhanced or high-precision sensitivity, and the TC-PCF is versatile, making it suitable for detecting four different types of alcohol. This sensor reveals exceptional wavelength sensitivities of 8383.168 nm/RIU, 13759.69 nm/RIU and 14554.26 nm/RIU for ethanol, propanol and butanol respectively for the fiber length of 1600 µm. The amplitude sensitivity for ethanol, propanol, and butanol are 2.95 RIU<sup>−1</sup>, 5.16 RIU<sup>−1</sup> and 5.82 RIU<sup>−1</sup> respectively, while the corresponding resolutions for ethanol, propanol and butanol are 119.2 × 10<sup>−7</sup> RIU, 72.6 × 10<sup>−7</sup> RIU and 68.7 × 10<sup>−7</sup> RIU respectively. The figures of merit (FOM) are 29.50 RIU<sup>−1</sup>, 46.19 RIU<sup>−1</sup> and 53.26 RIU<sup>−1</sup> for ethanol, propanol and butanol respectively. The sensor offers high sensitivity, a compact design and ease of fabrication which offers significant advantages over traditional alcohol detection methods, making it highly suitable for future alcohol sensing applications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101348"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167894","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

Multifunctional light field modulations of composite- phase-based diatomic metasurfaces 复合相基双原子超表面的多功能光场调制

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2025.101353

Yuhan Ge , Zexu Liu , Xueyao Song , Jicheng Wang

引用次数: 0

Nanocomposite based electric and magnetic material enhancing electromagnetic characteristics of cotton substrate radiator 纳米复合材料增强棉基辐射器电磁特性

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2025.101367

Abhilash S. Vasu , T.K. Sreeja , N.R. Lakshmi , Silpa Ajith Kumar

{"title":"Nanocomposite based electric and magnetic material enhancing electromagnetic characteristics of cotton substrate radiator","authors":"Abhilash S. Vasu , T.K. Sreeja , N.R. Lakshmi , Silpa Ajith Kumar","doi":"10.1016/j.photonics.2025.101367","DOIUrl":"10.1016/j.photonics.2025.101367","url":null,"abstract":"<div><div>A novel method is proposed for improving electromagnetic radiation of antenna in two distant bands independently and consists of nanocomposite based electric, magnetic materials coating on radiator suitable for flexible antenna design. Coplanar waveguide (CPW) fed flexible radiator is designed and fabricated on thin cotton substrate, the radiating patch consists of heptagon ring, rigid structure and printed on surface of substrate. CPW antenna consists of a signal strip placed in between two rectangular ground plane at one side of the substrate and suitable for flexible conformal designs. The rigid strip radiates upper band signal due to its smaller dimension and heptagon strip generate lower band due to its longer structure. A nanocomposite based electric material Graphene Quantum Dots (GQDs) is coated on rigid radiating patch that enhance radiation of upper band and nanocomposite based magnetic material nickel (Ni) nanoparticles on heptagon ring patch to improve lower band characteristics of antenna. GQDs offer high conductivity and low loss tangent through sp²-hybridized carbon atoms, quantum confinement, and edge effects, making them ideal for transparent, flexible antennas with superior signal transmission. Ni has unpaired 3d-electrons that produce magnetic moments due to their spin and orbital angular momentum, enabling high conductivity, permeability, and frequency-dependent properties ideal for antenna. Nanocomposite coated antenna has gain, bandwidth enhancement of 96 % and 90 % respectively as compared to antenna without nanocomposite materials. The fabricated antenna attained 2.4/5.2/5.8 GHz WLAN, ISM, 5 G sub 6 GHz, 2.4/5.0 GHz Wi-Fi and 2.5/3.5/5.5 GHz WiMAX bands, suitable for practical wireless applications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101367"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465434","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

Studying the influence of deposition methods on ultrashort pulse generation 研究沉积方法对超短脉冲产生的影响

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2025.101358

Harith Ahmad , Kirubhashni Loganathan , Norazriena Yusoff , Mohamad Zamani Zulkifli

{"title":"Studying the influence of deposition methods on ultrashort pulse generation","authors":"Harith Ahmad , Kirubhashni Loganathan , Norazriena Yusoff , Mohamad Zamani Zulkifli","doi":"10.1016/j.photonics.2025.101358","DOIUrl":"10.1016/j.photonics.2025.101358","url":null,"abstract":"<div><div>This study investigates the influence of deposition methods on the laser performance of Erbium-doped fiber lasers (EDFL). Two deposition methods, namely the drop-casting and airbrush-sprayed techniques, were employed. The reduced graphene oxide/magnesium oxide (rGO/MgO) composite applied using drop-casting on arc-shaped fiber shows a higher modulation depth of 3.27 %, surpassing the 2.12 % achieved by the airbrush-sprayed version. Both composites' structures ensure high thermal stability, allowing for continuous operation for 5 hours without performance degradation. The generation of mode-locking in the EDFL occurred when the incident light interacted with the rGO/MgO composite through the evanescent wave, reaching the threshold pump power of 389.69 mW. Integrating the saturable absorber (SA) in the cavity and adjusting the polarization controller (PC) enables stable pulse generation with a pulse duration of 0.91 ps for drop-casted arc-shape fiber and 1.32 ps for sprayed arc-shape fiber with a fundamental frequency of 18.10 MHz. The difference in modulation depth and laser performance is due to the condensed deposition achieved using drop-casting, resulting in improved interaction between light and matter and better saturable absorption properties. The results of this research provide a compelling alternative for ultrafast fiber lasers that are both compact and efficient, and they have the potential to be utilized in high-speed optical communication as well as medicinal imaging technologies.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101358"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167030","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

Bimetal-wrapped nanowire structure for improved efficiency and unidirectional emission of single-photon sources 双金属包裹纳米线结构用于提高单光子源的效率和单向发射

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2024.101349

Youngsoo Kim, Seung Hyeon Hong, Seokhyeon Hong, Soon-Hong Kwon

{"title":"Bimetal-wrapped nanowire structure for improved efficiency and unidirectional emission of single-photon sources","authors":"Youngsoo Kim, Seung Hyeon Hong, Seokhyeon Hong, Soon-Hong Kwon","doi":"10.1016/j.photonics.2024.101349","DOIUrl":"10.1016/j.photonics.2024.101349","url":null,"abstract":"<div><div>To meet the increasing demand for wavelength scaled light-emitting devices, this study developed a novel dielectric nanowire configuration comprising two distinct metals. This structure is expected to function as a unidirectional light source owing to the reflection occurring at the junctions of the two metals. The performance of this structure as a unidirectional nanosized light source was validated using finite-difference time-domain (FDTD) simulations. With a minimal waveguide width of w = 115 nm, this structure mitigates the risks associated with free-space radiation and interference from other wavelength modes. The subwavelength-sized surface plasmon polariton waveguide caused substantial field concentration, resulting in a spontaneous emission enhancement rate approximately 50 times higher than that of the bulk material. The exceptional characteristics and significantly elevated spontaneous emission enhancement rate of the proposed structure suggest its potential as a single-photon light source.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101349"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167886","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 a compact atto-joule-per-bit bus-coupled photonic nanocavity switch 一种紧凑的阿焦耳/比特总线耦合光子纳米腔开关的设计

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2024.101346

Jianhao Shen, Swapnajit Chakravarty

{"title":"Design of a compact atto-joule-per-bit bus-coupled photonic nanocavity switch","authors":"Jianhao Shen, Swapnajit Chakravarty","doi":"10.1016/j.photonics.2024.101346","DOIUrl":"10.1016/j.photonics.2024.101346","url":null,"abstract":"<div><div>We experimentally demonstrate an array of bus-coupled compact one-dimensional photonic crystal nanocavities with large extinction, high-quality factor, and large free spectral range (FSR) exceeding 300 nm centered on the telecom wavelength at 1550 nm. We present designs for an oxide-clad bus-coupled PC switch with 0.96 dB insertion loss, 4.33 dB extinction, and ∼260 aJ/bit switching energy by careful control of the cavity geometry as well as p-n junction doping. We also demonstrate that air-clad bus-coupled PC switches can operate with 1 dB insertion loss, 3 dB extinction, and ∼80 aJ/bit switching energy. We present a design route integrating phase change materials that can undergo a controlled transition between amorphous to crystalline material phases of the PCMs for a large change in refractive index. The large index change can overcome fabrication imperfections to effectively align the PC nanocavity resonance to the source laser wavelength thereby enabling true atto-joule per bit operation without the need for active power-consuming thermal heaters.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101346"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167888","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

Deformable time-modulated wire media resonators 可变形时调线介质谐振器

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2024.101343

Mykola Khobzei , Vladyslav Tkach , Dmytro Vovchuk , Anna Mikhailovskaya , Serhii Haliuk , Andrii Samila , Jurgis Porins , Toms Salgals , Vjaceslavs Bobrovs , Pavel Ginzburg

{"title":"Deformable time-modulated wire media resonators","authors":"Mykola Khobzei , Vladyslav Tkach , Dmytro Vovchuk , Anna Mikhailovskaya , Serhii Haliuk , Andrii Samila , Jurgis Porins , Toms Salgals , Vjaceslavs Bobrovs , Pavel Ginzburg","doi":"10.1016/j.photonics.2024.101343","DOIUrl":"10.1016/j.photonics.2024.101343","url":null,"abstract":"<div><div>Temporal degrees of freedom open new capabilities to control electromagnetic interactions with structured media. While rapid changes in effective material susceptibilities, comparable to the carrier oscillation period, suggest emerging new peculiar phenomena, experimental realizations lag theoretical predictions. However, effects inspired by slow, practically realizable parametric changes in effective media possess both fundamental interest and immediate practical applications. Here we perform comprehensive studies of modal hierarchy in a deformable Fabry-Perot resonator, constructed from a wire array, embedded in a compressible dielectric host. The lattice parameter of the wire media can be adjusted within a 3-fold range (from 10 to 30 mm), resulting in extraordinary electromagnetic tunability. Furthermore, the resonator response demonstrates an extreme sensitivity to mechanical deformation as resonance hierarchy in metamaterial assembly strongly depends on the lattice constant. Specifically, a 0.3 mm change in the lattice constant, being as small as ∼0.002<em>λ</em>, shifts the Fabry-Perot resonance frequency range by 1.7–1.8 GHz. Due to their exceptional responsiveness, deformable electromagnetic metamaterials can function as adaptive components, enabling new types of wireless communications where the frequency, bandwidth, and signal direction can be dynamically adjusted in real-time to accommodate varying environmental conditions and user demands.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101343"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167890","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

Planar infrared double-layer black phosphorus tunable filter independent of polarization and with low angle of incidence dependence 平面红外双层黑磷可调谐滤光片不依赖偏振，低入射角依赖性

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2025.101356

Victor Dmitriev , Cristiano Oliveira , Gildenilson Duarte

{"title":"Planar infrared double-layer black phosphorus tunable filter independent of polarization and with low angle of incidence dependence","authors":"Victor Dmitriev , Cristiano Oliveira , Gildenilson Duarte","doi":"10.1016/j.photonics.2025.101356","DOIUrl":"10.1016/j.photonics.2025.101356","url":null,"abstract":"<div><div>The anisotropic properties of monolayer black phosphorus (BP) allow the creation of plasmonic devices with directional-dependent properties. In this work, we propose an electromagnetic component based on BP for the THz and infrared regions, which is independent of polarization. The proposed device presents a periodic structure with a unit cell that consists of two square coupled BP layers with a thin dielectric sheet of h-BN between them. The two squares are rotated by 90<sup>∘</sup> with respect to each other. Such a structure provides a transmittance curve with one dipole resonant frequency regardless of the incident wave polarization. It is also characterized by a low dependence on the angle of incidence. The results are obtained by finite-element electromagnetic simulations and temporal coupled-mode theory. The suggested BP metasurface can be used as a dynamically tunable filter, switch, modulator, and sensor at frequencies much higher than those of the corresponding graphene structures.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101356"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167032","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

Multilayer homogenization and experimental demonstration of artificial plasma matched with free space 多层均匀化及与自由空间匹配的人工等离子体实验论证

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2024.101344

J.A. Parra , A.G. Zhuravlev , D.V. Zhirihin , A.D. Sayanskiy , S.B. Glybovski , J.D. Baena

{"title":"Multilayer homogenization and experimental demonstration of artificial plasma matched with free space","authors":"J.A. Parra , A.G. Zhuravlev , D.V. Zhirihin , A.D. Sayanskiy , S.B. Glybovski , J.D. Baena","doi":"10.1016/j.photonics.2024.101344","DOIUrl":"10.1016/j.photonics.2024.101344","url":null,"abstract":"<div><div>A multilayer homogenization technique based on a cascade product of three transfer matrices has been proposed for a general artificial medium comprising periodically stacked impedance sheets. This method has been demonstrated to precisely predict the parameters of structures that mimic artificial plasma with different electrical sizes of the unit cell, while the simple Drude plasma model describes well only structures with a unit cell much smaller than the wavelength. Using the multilayer homogenization technique, we have found some effective permeability that is automatically neglected in the conventional Drude plasma approximation which only considers permittivity. It can seriously affect the desired impedance matching with free space above the plasma frequency. To improve the impedance matching, and thus reduce ripples above the plasma frequency, it is necessary to design unit cells with high equivalent self-inductance. According to theoretical and numerical results, we have demonstrated that the replacement of straight strips with zigzag strips of the same width can considerably improve the quality of the impedance matching. This work opens the route to new designs of high-pass filters based on artificial plasmas with flat transmission above the cutoff frequency. A proof-of-concept experiment is shown.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101344"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167889","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

A proposed single-bit planar conformal intelligent reflective surface intended for wireless mm-wave applications 提出了一种用于无线毫米波应用的单比特平面共形智能反射表面

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-02-01 DOI: 10.1016/j.photonics.2025.101359

Nima Ahmadi, Forouhar Farzaneh

引用次数: 0