Optical and Quantum Electronics最新文献

{"title":"Theoretical study of one-dimensional annular photonic crystal based chemical sensor for detection of organic compounds","authors":"Sujit Kumar Saini,&nbsp;Sakshi Gandhi,&nbsp;Anubha Gupta,&nbsp;Suneet Kumar Awasthi","doi":"10.1007/s11082-025-08352-4","DOIUrl":"10.1007/s11082-025-08352-4","url":null,"abstract":"<div><p>This study investigates the organic compound sensing capability of a one-dimensional (1D) defective annular photonic crystal (DeAPhC). The proposed structure, represented as (AB)⁵CDC(AB)⁵, features a cylindrical air cavity (region D) at its center, whose inner walls are coated with a thin cylindrical layer (region C). This defect is introduced within a periodic annular photonic crystal (APhC) composed of ten alternating layers of materials A and B. The air cavity thickness is optimized to 1400 nm, which yields a maximum quality factor of 10,388.88 and a sensitivity of 1354.5 nm/RIU when the cavity is sequentially loaded with water and pentane. The structure also demonstrates an excellent figure of merit (FoM) on the order of 10⁻³ and a limit of detection (LoD) as low as 10⁻⁵, indicating high precision in detecting trace amounts of organic compounds in water samples. These findings highlight the potential of the proposed DeAPhC structure for highly sensitive chemical sensing. The approach can be extended to the development of advanced sensors for industrial and biomedical applications.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical simulation of optical properties for silver nanoparticles of different shapes in vacuum and water","authors":"Igor Kon,&nbsp;Andrey Zyubin,&nbsp;Darya Poltorabatko,&nbsp;Ilia Samusev","doi":"10.1007/s11082-025-08452-1","DOIUrl":"10.1007/s11082-025-08452-1","url":null,"abstract":"<div><p>The paper presents the results of using the finite-difference time-domain (FDTD) method to simulate the optical properties of silver nanoparticles (AgNPs) of different shapes. The calculations were carried out in a medium with the refractive index of water (H₂O) and in vacuum, under the incidence of polychromatic radiation. The distributions of the maximum electric field strength as a function of incident radiation wavelength were calculated and plotted. The optical parameters, such as absorption, scattering, and extinction cross sections, were calculated using Ansys Lumerical FDTD software. A complex theoretical explanation of the obtained optical properties in terms of nanoplasmonics is provided. In particular, the patterns of resonant optical peak distribution as a function of irradiation wavelength are discussed. Furthermore, the paper demonstrates the potential tuning of nanoobjects optical properties with various geometries, obtained through controlled synthesis for various fields of applied nanoplasmonics in the H₂O medium. Since colloidal nanoparticles are produced using physical and chemical methods in aqueous solutions, the obtained results can be useful and important for the nanoparticles controlled synthesis and saving laboratory resources.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TD-DFT investigation of small molecular donors for enhanced organic photovoltaics","authors":"A. Arunkumar,&nbsp;Xue-Hai Ju,&nbsp;Adeel Mubarik","doi":"10.1007/s11082-025-08454-z","DOIUrl":"10.1007/s11082-025-08454-z","url":null,"abstract":"<div><p>Many researchers are becoming interested in using metal-free organic compounds (especially donor molecules) in photovoltaic (PV) devices nowadays. Considering the (E)-6-(benzofuran-2-yl)-3-(6-(benzofuran-2-yl)-1-(2-ethylhexyl)-2-oxoindolin-3-ylidene)-1-(2-ethylhexyl)indolin-2-one (IBF), seven new donor–acceptor–donor (D–A–D) with small molecular donors (SMDs) (IBF-D1 to IBF-D7) are designed and investigated for organic solar cells (OSCs) using density functional theory (DFT) and time-dependent DFT (TD-DFT) methods. With the MPW1PW91 functional and the 3-21G basis set being chosen, the theoretically calculated wavelengths (<i>λ</i>_<i>max</i>) are presented. The molecular orbitals (MOs) energy gaps (<i>E</i>_<i>g</i>) of the compounds have values ranging from 2.22 to 2.42 eV. Specifically, the lowest <i>E</i>_<i>g</i> values are found in IBF-D1 (2.25 eV) and IBF-D6 (2.22 eV). Compared to IBF (2.19 eV), IBF-D2 and IBF-D7 show lower excitation energy differences (<i>E</i>_<i>x</i>). The derivatives (IBF-D1, IBF-D3, IBF-D4, IBF-D5, and IBF-D6) have the highest <i>λ</i>_<i>max</i> values compared to IBF. The reorganization energies (RE) are between 0.0125–0.0195 eV for electron (<i>λ</i>_<i>e</i>) and 0.0019–0.0115 eV for hole mobilities (<i>λ</i>_<i>h</i>). Additional support for these findings comes from measurements of the transition density matrix (TDM) and molecular electrostatic potential (MEP). Compared to IBF (1.22 eV), IBF-D1 (1.24 eV), IBF-D4 (1.23 eV), and IBF-D6 (1.26 eV) have the highest open circuit voltage (<i>V</i>_<i>oc</i>). The power conversion efficiency (<i>PCE</i>) values range from 0.83 to 1.13 %. In particular, IBF-D1 (1.11%) and IBF-D6 (1.13%) are superior <i>PCEs</i> of the OSCs. The nonlinear optical (NLO) parameters of the dipole moment (<i>µ</i>), polarizability (<i>α</i>), and first-order hyperpolarizability (<i>β</i>) for the molecules IBF-D1 (<i>µ</i> = 1.08 D, <i>β</i> = 1.70 esu, <i>α</i> = 5.00 esu) and IBF-D6 (<i>µ</i> = 3.40 D, <i>α</i> = 5.08 esu, <i>β</i> = 2.44 esu, respectively) are higher than those of IBF (<i>µ</i> = 0.84 D, <i>α</i> = 4.42 esu, <i>β</i> = 0.07 esu)<i>.</i> Finally, IBF-D1 and IBF-D6 are highly advised to design organic PV with remarkable performance for the optoelectronic devices.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selecting the state of shape memory alloys by optical filtering","authors":"Ahmed Kotbi,&nbsp;Wiaam El Hakim,&nbsp;Pierre Barroy,&nbsp;Michael Lejeune,&nbsp;Hani Al Hajjar,&nbsp;Muneeb Ullah-Khan,&nbsp;Frederic Lamarque,&nbsp;Andreas Zeinert","doi":"10.1007/s11082-025-08455-y","DOIUrl":"10.1007/s11082-025-08455-y","url":null,"abstract":"<div><p>The aim of this work is to design and fabricate narrow-band optical filters to control the state of shape memory alloys (SMA). The study focuses on developing optical filters capable of inducing localized deformation in SMA micro wires, which are wirelessly operated using laser beams. To achieve this, various filter designs were evaluated through optical modeling of multilayer coatings, tailored to the required filtering function, using the specialized software “Geneticode”. Hexamethyldisiloxane (HMDSO) and silver (Ag) were deposited onto glass substrates using Plasma Enhanced Chemical Vapor Deposition (PECVD) and sputtering techniques, respectively, to fabricate optical filters based on the multi-cavity metal-dielectric (MCMD). The optical properties of the SiOₓC_γ:H and Ag films, including the refractive index, were analyzed using transmission and reflection spectra. These properties were determined by applying classical models such as the O’Leary-Johnson-Lim (OJL) interband transition model, the harmonic oscillator model, Tauc-Lorentz model and the Drude model.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the optical and thermoplasmonic properties of silica-core nanoparticles coated with copper and gold shells (SiO2/Cu/Au) incorporated into healthy and infected breast tissues (types 1 and 2)","authors":"K. Abich,&nbsp;R. Masrour,&nbsp;A. Akouibaa,&nbsp;M. Benhamou","doi":"10.1007/s11082-025-08445-0","DOIUrl":"10.1007/s11082-025-08445-0","url":null,"abstract":"<div><p>The development of highly tunable plasmonic nanostructures is paramount for advancing photothermal applications in oncology. This study theoretically investigates the optical and thermoplasmonic properties of silica-core nanoparticles coated with successive copper and gold shells (SiO₂/Cu/Au) when embedded within distinct biological media: healthy and infected breast tissues (types 1 and 2). The nanoparticles' optical response is exquisitely sensitive to both their geometry and their surrounding environment. We established that the Surface Plasmon Resonance (SPR) serves as a robust indicator of the host tissue, shifting from <span>(535{text{ nm}})</span> in healthy to <span>(540{text{ nm}})</span> in cancerous media, accompanied by superior absorption in the latter. This intrinsic sensitivity is complemented by a high degree of structural tunability. Systematically reallocating the internal dimensions by increasing the silica core radius while thinning the metallic shells enabled a controlled red-shift of the SPR peak deep into the near-infrared (up to <span>(575{text{ nm}})</span>), together with a pronounced amplification of absorption. This geometric tuning directly translates to a marked enhancement in the local electric field (Faraday's number) and photothermal conversion efficiency (Joule's number). The photothermal performance was assessed under two distinct irradiation regimes. Continuous-wave (cw) exposure revealed a key diagnostic capability: a paradoxical thermal response where the nanoparticles induced a more substantial temperature rise in healthy ~65 °C versus cancerous ~43 °C tissue. This thermal differential acts as a robust signature for tissue discrimination. Transitioning to a femtosecond-pulsed regime revealed an operational mode defined by rapid thermal decay (~7–8 ns) and tight spatial confinement of heat, a feature highly advantageous for targeted therapies. The convergence of tunable plasmonics with a dual, modality-dependent thermal response solidifies the identity of these (SiO₂/Cu/Au) nanostructures as a highly versatile theranostic tool, providing a robust foundation for developing more sophisticated interventions in breast cancer.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Power-dependent photoluminescence enhancement in Ni, Cu, and Co-doped ZnO nanoparticles for optoelectronic device applications","authors":"Imen Ben Elkamel,&nbsp;Nejeh Hamdaoui,&nbsp;Amine Mezni,&nbsp;Ridha Ajjel,&nbsp;Lotfi Beji","doi":"10.1007/s11082-025-08336-4","DOIUrl":"10.1007/s11082-025-08336-4","url":null,"abstract":"<div><p>The photoluminescence properties of doped zinc oxide (ZnO) nanoparticles have attracted significant attention due to their potential for various optoelectronic applications. Doping ZnO with specific impurities offers a powerful approach to improve its luminescent behavior. In this study, we present a comprehensive investigation of the photoluminescence characteristics of doped ZnO nanoparticles under varying power levels. Our experimental results reveal a remarkable enhancement in the photoluminescence emission intensity with increasing power levels, so the intensity of the PL peak at 400 nm increased by 45% with Ni doping compared to undoped ZnO demonstrating the potential of doped ZnO nanoparticles for high-power optoelectronic devices. The enhancement was found to be power-dependent, with the highest intensity observed at 60 mW excitation power. Moreover, we identify the key factors responsible for this enhancement and propose a novel approach to further optimize the photoluminescence performance.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exact solutions and applications of inhomogeneous vector solitons in optical media","authors":"Emmanuel Yomba","doi":"10.1007/s11082-025-08435-2","DOIUrl":"10.1007/s11082-025-08435-2","url":null,"abstract":"<div><p>Traditional models of soliton dynamics often rely on single-mode approximations; however, practical optical fibers typically exhibit structural inhomogeneities and birefringence, resulting in complex multi-mode interactions. To better capture these dynamics, the scalar nonlinear Schrödinger equation (NLSE) has been extended to vector coupled NLSEs (CNLSEs), which offer a more realistic framework for describing pulse propagation in such environments. In this work, we study the evolution of vector solitons in inhomogeneous two-mode optical fibers governed by a generalized system of coupled NLSEs with ten variable coefficients–significantly generalizing prior models limited to five. Our formulation incorporates key physical effects, including variable group velocity dispersion, self- and cross-phase modulation, linear gain or loss, and external electro-optic phase modulation. Using a similarity transformation method, we reduce the variable-coefficient system to its constant-coefficient counterpart and derive exact analytical solutions. A distinguishing feature of our approach is the classification of self-similar dynamics into two distinct regimes: one with an internal quadratic potential allowing arbitrary scaling functions, and one with a vanishing potential where the pulse shape is determined by compatibility constraints. This classification leads to the construction of nine families of novel chirped similariton solutions, including W-shaped-dipole, bright-dipole, dark-dipoles, and kink-anti-kink-dipole. Numerical simulations confirm that strongly chirped similaritons exhibit greater robustness and structural stability, whereas their weakly chirped counterparts may display breather-like oscillations. These results demonstrate the tunability of soliton characteristics via system parameters and highlight the potential of the model for applications in nonlinear photonics, ultrafast optical signal processing, and Bose–Einstein condensates.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A waveguide amplitude modulator based on a graphene plasmonic resonance","authors":"Jiří Petráček,&nbsp;Jiří Čtyroký,&nbsp;Vladimír Kuzmiak","doi":"10.1007/s11082-025-08442-3","DOIUrl":"10.1007/s11082-025-08442-3","url":null,"abstract":"<div><p>Photonic waveguides with graphene can enable resonant coupling of the waveguide mode and the graphene plasmonic modes. We demonstrate theoretically that the plasmonic resonance in the hybrid waveguides can be significantly enhanced by employing a graphene nanoribbon with a deep subwavelength width when a lower-order graphene nanoribbon mode and a mode of a bare waveguide are efficiently coupled. A further increase is possible when a single graphene stripe is replaced by a finite array of graphene nanoribbons. This effect may provide a feasible platform for an efficient amplitude modulation which can be employed in the design of specific devices such as low-power modulators, filters, or sensors.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 9","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11082-025-08442-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-performance graphene-integrated terahertz antenna for tumor detection in breast tissue","authors":"Gandreddi Lakshmi Prasanna Ashok,&nbsp;Ganimidi Veerendra Nath,&nbsp;Naveen Kumar Maurya,&nbsp;Bala Chakravarthy Neelapu","doi":"10.1007/s11082-025-08447-y","DOIUrl":"10.1007/s11082-025-08447-y","url":null,"abstract":"<div><p>Breast cancer continues to pose a significant health challenge, highlighting the need for advanced diagnostic technologies to improve treatment outcomes. This paper presents a novel approach for tumor detection in human breast tissue using a graphene-integrated terahertz (THz) patch antenna. THz antennas are crucial in medical diagnostics due to their unique properties, and the proposed star-shaped graphene-integrated antenna operates at a resonant frequency of 4.16 THz. The antenna, with dimensions of <span>( 114 times 100 times 26)</span> <span>(upmu text {m}^3)</span> is designed on a polyimide substrate, characterized by a dielectric constant of 3.5 and a loss tangent of 0.0027. Simulations carried out in Computer Simulation Technology (CST) studio software show that the antenna demonstrates strong performance, with a return loss of <span>(-)</span>51.29 dB, a gain of 5.64 dBi, a bandwidth of 3.7 GHz, and a Voltage Standing Wave Ratio (VSWR) of 1.005. By exploiting the potential of the THz spectrum, the proposed antenna shows promise as a valuable tool for early breast cancer detection.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 9","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multi-cancer metamaterial biosensor: refractive index-based identification of malignant cells","authors":"Nedjmeddine Mellak,&nbsp;Bouchra Moulfi,&nbsp;Tahar Aliouar","doi":"10.1007/s11082-025-08436-1","DOIUrl":"10.1007/s11082-025-08436-1","url":null,"abstract":"<div><p>This research introduces a novel biosensor based on terahertz (THz) metamaterials, aimed at highly sensitive, label-free, and non-invasive detection of cancer. Utilizing the distinctive characteristics of THz metamaterials, the biosensor examines the variations in the refractive index of biological samples, offering an accurate instrument for early cancer diagnosis. The biosensor achieves impressive functionality with a sensitivity of 892 GHz/RIU, a quality factor (Q) of 57.7, and a figure of merit of 18.98 RIU⁻¹, and operates at a resonance frequency of 2.688 THz. With a groundbreaking design refined through the full finite element method, the sensor exhibits an absorption rate of 98% and can effectively identify subtle changes in the refractive index linked to several cancer types, such as Jurkat blood, HeLa cervical, PC-12 adrenal gland, MDA-MB-231 and MCF-7 breast cancers, along with basal skin cancer. This biosensor marks a significant leap forward in THz-based medical diagnostics, providing a compact, lab-on-chip compatible unit for swift, dependable, and early cancer detection at the cellular scale.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 9","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}