Photonics and Nanostructures-Fundamentals and Applications最新文献

{"title":"Dual-frequency polarization-insensitive and wide-angle metasurface for electromagnetic energy harvesting","authors":"Zhichao Shen ,&nbsp;Bo Lv ,&nbsp;Zao Yi ,&nbsp;Ye Tian ,&nbsp;Yuxi Jin ,&nbsp;Sijie Wang ,&nbsp;Ting Liu ,&nbsp;Shiyun Xia ,&nbsp;Hongyang Mu ,&nbsp;Xuanrui Zhang ,&nbsp;Jinhui Shi","doi":"10.1016/j.photonics.2024.101328","DOIUrl":"10.1016/j.photonics.2024.101328","url":null,"abstract":"<div><div>Recently, various metamaterial-based harvesters have been investigated for harvesting electromagnetic energy from the ambient environment. However, they suffer from narrow absorption bandwidths and low energy harvesting efficiency. In this paper, we propose a miniaturized dual-layer metasurface designed for harvesting ambient electromagnetic energy, featuring wide-angle responsivity and polarization-insensitivity. The metasurface comprises two metal rings and two layers of dielectric substrates. The results demonstrate that the harvester functions within the S- and C-bands, resonating at frequencies of 2.98 GHz and 4.32 GHz, respectively. These resonant frequencies induce electric dipole oscillations, facilitating strong absorption of electromagnetic waves. The harvesting efficiency can reach to 92.5 % and 93.4 % at the two frequencies. Moreover, the harvester performance over a wide range of incidence angles and various polarized angles of the incident wave is analyzed. The harvester can be used for harvesting the redundant electromagnetic energy of communications or radars in the future.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101328"},"PeriodicalIF":2.5,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720533","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}

{"title":"Improving the label-free rapid semi-quantification of E.coli by AgNPs-decorated hydrogel inverse opal photonic crystals","authors":"Pham Hong Phong ,&nbsp;Tran Hong Minh ,&nbsp;Vu Thi Thuy Linh ,&nbsp;Nguyen Trong Nghia ,&nbsp;Nghiem Thi Ha Lien ,&nbsp;Nguyen Duc Toan ,&nbsp;Do Tien Phat ,&nbsp;Le Minh Thanh ,&nbsp;Nguyen Thi Hanh","doi":"10.1016/j.photonics.2024.101330","DOIUrl":"10.1016/j.photonics.2024.101330","url":null,"abstract":"<div><div>Using photonic crystal materials for colorimetric sensing, the influences of structure and composition on the photonic bandgap (PBG) of materials are always vital to detection. In this work, the effects of pores in the structure of polyethylene diacrylate-based inverse opal photonic crystal (PEGDA-based IOPC) and the concentration of silver nanoparticles (AgNPs) used for decoration of the IOPC by chemical reaction on the shift of PBG center (λ_rp) have been studied for rapid semi-quantification of <em>Escherichia coli</em> (<em>E. coli</em>). We found that pores in the structure of PEGDA-based IOPC significantly increased the amount of AgNPs attached to this material compared with the structure created by the ordered self-assembly of spherical SiO₂ particles of the parent template, leading to a pronounced red-shift of λ_rp. At the concentration of 20 µg/L AgNPs (<em>C</em>_AgNPs) used for decoration, the shift of λ_rp reached 80 nm due to the increase in the average refractive index (<em>n</em>_{<em>aver</em>.}) of the material. It thus enabled us to observe changes in the color of the reflected light with the naked eye. In addition, since the increase in the concentration of <em>E.coli</em> (<em>C</em>_E.coli) also caused a red-shift of the λ_rp, the <em>C</em>_AgNPs, thus, could be reduced but still give a sufficiently strong shift of λ_rp to detect <em>E.coli</em> at a high level. The spectral position of the reflectance peak changed from green to red with increasing the <em>C</em>_{<em>E.coli</em>} from 50 cfu/mL to 10⁶ cfu/mL at the <em>C</em>_AgNPs = 10 µg/L. These results indicated the potential application of AgNPs decorated PEGDA-based IOPC in rapid semi-quantification of <em>E.coli</em> by the naked eye.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101330"},"PeriodicalIF":2.5,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720534","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}

{"title":"Research on terahertz bessel beams based on metasurface","authors":"Haoxiang Li ,&nbsp;Da Mu ,&nbsp;Zongyu Cui ,&nbsp;Jiaojiao Ren ,&nbsp;Jianli Ma ,&nbsp;Yu Zhou ,&nbsp;Zihao Lin","doi":"10.1016/j.photonics.2024.101329","DOIUrl":"10.1016/j.photonics.2024.101329","url":null,"abstract":"<div><div>Traditional terahertz imaging systems are constrained by a limited depth of field, which leads to blurry images outside the focal point. To address this limitation, we designed a metasurface with rectangular pillar-structured units based on the transmission phase using a ceramic slurry. Using the finite-difference time-domain method for calculations and simulations, the arranged metasurface unit cells in a ring configuration produced a Bessel beam with a non-diffracting distance of 30 mm. The study found that the phase gradient, light source divergence angle, material refractive index variation, and processing errors influenced the beam propagation characteristics. Notably, the phase gradient and light source divergence angle are directly proportional to the non-diffracting distance and significantly affect the performance of imaging system. The metasurface designed in this study enhances the depth of field of terahertz imaging systems and offers novel insights into the manipulation and application of terahertz beams. This innovation has potential applications in fields such as terahertz imaging and nondestructive testing.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101329"},"PeriodicalIF":2.5,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747888","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}

{"title":"Long-range over-a-meter NFC link budget with distributed large-area coils","authors":"Anton Kharchevskii ,&nbsp;Ildar Yusupov ,&nbsp;Dmitry Dobrykh ,&nbsp;Mikhail Udrov ,&nbsp;Sergey Geyman ,&nbsp;Yulia Grigorovich ,&nbsp;Alexander Zolotarev ,&nbsp;Mikhail Sidorenko ,&nbsp;Irina Melchakova ,&nbsp;Anna Mikhailovskaya ,&nbsp;Pavel Ginzburg","doi":"10.1016/j.photonics.2024.101327","DOIUrl":"10.1016/j.photonics.2024.101327","url":null,"abstract":"<div><div>Near-field communication is considered to have a high level of hardware security protection owing to its natural short-range wireless operation, which makes a man-in-the-middle attack impossible. Here we question this statement by demonstrating a several-meter range NFC communication channel, supported by resonance-tuned large-area distributed coils. Typical NFC antenna architectures encompass multi-turn wires, forming flat resonant coils. Being several centimeters across, those devices cannot provide reliable communication between items, situated more than a fraction of a meter apart. An appealing approach to the range extension is to enlarge the coil area, thus spreading the magnetic field over larger distances. However, in this case, the overall length of folded conducting wires becomes wavelength comparable, nevertheless, the overall size of the coil remains electrically small, considering the 13.56 MHz operation frequency. Here we demonstrate several coil designs and establish a reliable NFC channel over several-meter distances. Adaptive impedance matching is implemented to maintain an energy power transfer between resonant coils, thus further extending the communication channel and making it robust to clutter. The ability for long-range NFC communication raises security concerns in sensitive contactless operations like wireless payments, prompting the need for enhanced countermeasures due to potential hardware vulnerabilities.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101327"},"PeriodicalIF":2.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747889","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}

{"title":"Tuneability and optimum functionality of plasmonic transparent conducting oxide-Ag core-shell nanostructures","authors":"Mohamed K. Zayed ,&nbsp;Hesham Fares ,&nbsp;Jamal Q.M. Almarashi ,&nbsp;Samar Moustafa","doi":"10.1016/j.photonics.2024.101326","DOIUrl":"10.1016/j.photonics.2024.101326","url":null,"abstract":"<div><div>Tunning localized surface plasmon resonance (LSPR) in transparent conducting oxides (TCO) has a great impact on various LSPR-based technologies. In addition to the commonly reported mechanisms used for tunning LSPR in TCOs (e.g., size, shape, carrier density modifications via intrinsic and extrinsic doping), integrating them in core-shell structures provides an additional degree of freedom to expand its tunability, enhance its functionality, and widen its versatility through application-oriented core-shell geometrical optimization. In this work, we explore the tuneability and functionality of two TCO nanostructures; indium doped tin oxide (ITO) and gallium doped zinc oxide (GZO) encapsulated with silver shell within the extended theoretical Mie theory formalism. The effect of core and shell sizes on LSPR peak position and line width as well as absorption and scattering coefficients is numerically investigated. Simulations showed that LSPRs of ITO-Ag and GZO-Ag core-shell nanostructures have great tunning capabilities, spanning from VIS to IR spectral range including therapeutic window of human tissue and essential solar energy spectrum. Potential functionality as refractive index sensor (RIS) and solar energy absorber (SEA) are examined using appropriate figure of merits <span><math><mrow><mo>(</mo><mi>FoM</mi><mo>)</mo></mrow></math></span>. Simulations indicate that a geometrically optimized core-shell architecture with exceptional <span><math><mi>FoMs</mi></math></span> for RIS and SEA can be realized. Contrary to carrier density manipulation, integrating TCO cores to metallic shells proves to be an effective approach to enhance tunability and optimize functionality for high performance TCO-based plasmonic devices, with minimum impact on the inherited physical and chemical properties of the used TCO-core materials.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"62 ","pages":"Article 101326"},"PeriodicalIF":2.5,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656408","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}

{"title":"Plasmonic MIM waveguide based FR sensors for refractive index sensing of human hemoglobin","authors":"Lokendra Singh ,&nbsp;Bukya Balaji ,&nbsp;Yogesh Tripathi ,&nbsp;Roshan Kumar ,&nbsp;Sameer Yadav","doi":"10.1016/j.photonics.2024.101325","DOIUrl":"10.1016/j.photonics.2024.101325","url":null,"abstract":"<div><div>Fano resonance (FR) is a universal phenomenon that is used to attain electromagnetic-induced transparency (EIT), high absorption and sensitivity, and low-power photonic devices. This work presents dual FR refractive index (RI) sensor models on a plasmonic metal-insulator-metal (MIM) waveguide system. The FR phenomenon is attained by including circular and elliptic nanorod defects in the bus waveguides. The resonances originate from the defect's narrow discreteness and the rectangular resonator's broad state. Analytical methods such as finite difference time domain (FDTD) and multimode interference coupled mode theory are adopted to analyze the FRs. The shapes of the Fano line and resonance peak amplitude can be tuned independently by controlling the diameter of the defects, the separation between the defects, and the coupling (between the resonator and the bus waveguide) distance. Moreover, the proposed structures detect the RI (human hemoglobin) variation in the bus waveguide and resonator. The obtained results with circular nanorod defect verify the autocorrelation coefficient of 99.92 %, ensuring the device's linearity and high performance. However, an autocorrelation of 99.7 % is attained by using two elliptic nanorod defects.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"62 ","pages":"Article 101325"},"PeriodicalIF":2.5,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656409","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}

{"title":"224-fs soliton pulses generation at 1μm from ytterbium-doped fiber laser with CoTe2 nanosheets as an ultrafast modulator","authors":"Jian-Xiang Zhang ,&nbsp;Qian Wang ,&nbsp;Kelei Miao","doi":"10.1016/j.photonics.2024.101324","DOIUrl":"10.1016/j.photonics.2024.101324","url":null,"abstract":"<div><div>Transition metal ditellurides (TMDTs) have numerous attractive properties, making them suitable for a wide range of applications. In this study, cobalt ditelluride (CoTe₂) nanosheets, a promising TMDT for photonic applications, were prepared using an ultrasound-enhanced liquid phase exfoliation (LPE) method. A novel saturable absorber (SA) employing CoTe₂ nanosheets was then fabricated by optically depositing them on microfiber. The nonlinear optical modulation properties of the CoTe₂ SA were investigated. A high-performance 1 μm ultrafast fiber laser was demonstrated by incorporating newly developed CoTe₂ nanosheets-based SA in a ring cavity ytterbium-doped fiber laser (YDFL). The dynamical behaviour of the proposed passively mode-locked YDFL in response to variations in pump optical power was investigated. The findings reveal that the device achieved a modulation depth of 2.5 %, and saturation light intensity of 30.6 MW/cm². Moreover, a stable and robust mode-locked soliton optical pulse sequence with a fundamental repetition frequency of 3.089 MHz, and a pulse duration of 224 fs was generated at 1032 nm. The proposed YDFL, being all-fiber, compact, and cost-effective, is set to find extensive applications in various domains, including optical fiber communication, sensing, and biomedical imaging.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"62 ","pages":"Article 101324"},"PeriodicalIF":2.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593162","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}

{"title":"A hybrid mode splitter for separation and excitation of photonic crystal odd and even modes using plasmonic waveguides","authors":"Ehsan Beiranvand,&nbsp;Mohammad Danaie,&nbsp;Majid Afsahi","doi":"10.1016/j.photonics.2024.101323","DOIUrl":"10.1016/j.photonics.2024.101323","url":null,"abstract":"<div><div>This study introduces a mode splitter through a novel coupling mechanism between photonic crystal waveguides and metal-insulator-metal plasmonic waveguides. Notably, the proposed structure demonstrates the capability to excite both odd and even modes within the photonic crystal waveguide. Numerical simulations of this structure were conducted using the finite difference time domain (FDTD) method. Our numerical analysis reveals an exceptional transmittance of 95 % at the waveguide intersection for the wavelength of 1550 nm. The successful coupling of plasmonic waveguides to photonic crystal waveguides unveils a vast array of opportunities for designing innovative devices that harness the synergistic potential arising from the distinctive characteristics of surface plasmons and photonic crystals. An inherent advantage of this design lies in its simple topology, enabling cost-effective and precise manufacturing processes. This device offers the ability to accurately separate and identify output modes. Additionally, we utilize this coupler in the design of a highly efficient power divider that not only achieves high transmittance but also provides adjustable control over the output power level.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"62 ","pages":"Article 101323"},"PeriodicalIF":2.5,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555644","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}

{"title":"Temperature-modulated acetone monitoring using Al2O3-coated evanescent wave fiber optic sensors","authors":"P. Manivannan,&nbsp;Zachariah C. Alex","doi":"10.1016/j.photonics.2024.101322","DOIUrl":"10.1016/j.photonics.2024.101322","url":null,"abstract":"<div><div>This paper presents an experimental study of a fiber-optic-based acetone sensor and its temperature effects for use as a breath analyzer to detect acetone in exhaled breath. The study employs fiber optic evanescent wave-based acetone sensing, utilizing sputter coated Aluminium Oxide (Al₂O₃)-coated probes fabricated via clad modification technique. The optical fibers were coated with Al₂O₃ to achieve thicknesses of 247.03 nm, 334.05 nm, and 468.75 nm. The sensor probes were characterized using, Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD), Ultraviolet-Visible (UV-Vis) Spectroscopy, and Spectroscopic Ellipsometry for uniformity, elemental, optical constants, and thickness of the Al₂O₃. The spectral responses of the probes were analyzed for acetone concentrations ranging from 0 to 100 ppm, with temperature modulation from room temperature to 100 °C. The probe with a ∼334 nm thick Al₂O₃ coating exhibited the highest response, reaching 6.2 % at 100 °C in 100 ppm acetone. Linear regression revealed that the ∼334 nm coated probe had the highest sensitivity at 5.98 counts/ppm. The sensor showed response and recovery times of approximately 12 and 17 seconds, respectively. This study underscores the stability and repeatability of temperature-modulated Al₂O₃-coated fiber optic sensors for selective acetone detection in various non-invasive applications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"62 ","pages":"Article 101322"},"PeriodicalIF":2.5,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555643","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}

{"title":"Cage-like micro-scaffolds fabricated by DLW method for cell investigation","authors":"A.V. Pisarenko ,&nbsp;D.S. Burkatovskii ,&nbsp;D.A. Kolymagin ,&nbsp;D.A. Chubich ,&nbsp;V.I. Borshchevskiy ,&nbsp;A.G. Vitukhnovsky","doi":"10.1016/j.photonics.2024.101321","DOIUrl":"10.1016/j.photonics.2024.101321","url":null,"abstract":"<div><div>This paper focuses on the use of direct laser writing method in fabricating three-dimensional biocompatible scaffolds that emulate the extracellular matrix. The interaction between HEK 293 cells and these cage-like scaffolds, particularly the effect of pore size on cell invasion, is explored in detail. Our study underscores the influence of scaffold architecture on cellular behavior and highlights the potential of direct laser writing technology in creating complex 3D scaffolds. The insights gleaned from this research could be invaluable in future applications such as tissue engineering, regenerative medicine, and drug delivery.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"62 ","pages":"Article 101321"},"PeriodicalIF":2.5,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536113","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}