Optical and Quantum Electronics最新文献

{"title":"Effect of laser-induced modification on structural properties and photoluminescence of amorphous arsenic sulfide thin films","authors":"D. Shuleiko,&nbsp;E. Konstantinova,&nbsp;E. Kuzmin,&nbsp;I. Budagovsky,&nbsp;P. Pakholchuk,&nbsp;D. Pepelyaev,&nbsp;S. Zabotnov,&nbsp;A. Kolobov,&nbsp;S. Kozyukhin","doi":"10.1007/s11082-025-08483-8","DOIUrl":"10.1007/s11082-025-08483-8","url":null,"abstract":"<div><p>In this study, we investigate laser-induced structural transformations in vitreous arsenic sulfide (As₂S₃) films deposited by thermal evaporation and spin-coating, as well as the corresponding changes in the photoluminescence (PL) properties of these films. The specified material is attractive for various applications in infrared optics and electronics, and it is important to improve its functionality by developing methods of its structural modification without changing the chemical composition. In our study pulsed (τ = 300 fs) and continuous laser irradiation at wavelengths of 515 and 532 nm respectively and a fluence of up to 56 mJ/cm² was used as means of As₂S₃ films modification. The results of the study reveal that, in the spin-coated As₂S₃, laser-induced formation of sulfur S₈ rings and polymer S chains takes place, while the local chemical composition of thermally evaporated films remains intact. PL intensity in the 1.6–2 eV range increases after laser treatment, due to creation of defect states in the Urbach edge region of the spectrum. Namely, the concentration of “wrong” homopolar bonds which act as radiative recombination centers for carriers, presumably increases, while paramagnetic defects in a form of S dangling bonds do not contribute to PL.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210881","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":"Novel optical sensor for temperature monitoring based on nematic liquid crystal (NLC) plasmonic structure","authors":"Naseem Alsaif","doi":"10.1007/s11082-025-08475-8","DOIUrl":"10.1007/s11082-025-08475-8","url":null,"abstract":"<div><p>Herein, a theoretical investigation for a nanoscale thermosensor to measure living cells’ temperature has been suggested based on a coupling between nematic liquid crystal of E7 type with metal-insulator-metal plasmonic structure. The design is built from a square-shaped resonance cavity, coupled with air waveguides. The nanocavity has been filled by a nematic liquid crystal of E7 type. The index of refraction of E7 NLC varies with the ambient temperature. In addition, the resonance wavelength depends on the index of refraction of E7 NLC. As a result, the proposed sensor could be used to monitor the surrounding temperature. The optical transmittance, electric field distribution, and performance parameters have been studied and computed through the finite difference time domain (FDTD) method. Further, the optimization of geometrical dimensions considering the performance of the suggested sensor has been studied. The presented design has a sensitivity of 599.5 nm/RIU (≈ 1.44 nm/°C) for temperatures ranging from 15 to 55 °C. In addition, a quality factor of 24.42, a figure of merit of 14.21 RIU⁻¹ (≈ 0.034 °C⁻¹), and ultra-high linearity of 0.9999 may be accomplished. The suggested design with high performance parameters and compact size can make a great argument for in vitro thermotherapy and nano-thermometry applications.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210880","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":"Engineered Graphene-Integrated 3D curved hyperbolic metamaterial nanolenses for advanced multiselective nanophotonic biosensing","authors":"Saeed Haji-Nasiri,&nbsp;Heidar Faraji,&nbsp;Shabnam Andalibi Miandoab","doi":"10.1007/s11082-025-08478-5","DOIUrl":"10.1007/s11082-025-08478-5","url":null,"abstract":"<div><p>Plasmonic sensing based on nanostructured multilayer hyperbolic metamaterials is an ultra-sensitive analytical tool for detecting biomolecules in a wide range of selectable wavelengths, which has high potential in clinical diagnostics and biomedical research. In this paper, we propose a novel plasmonic biosensor architecture based on a three-dimensional cylindrical hyperbolic metamaterial (CHMM) nanolens integrated with a rounded-corner gold grating. The nanolens consists of alternating graphene and Al₂O₃ bilayers, engineered in a curved cylindrical geometry, which significantly enhances light–matter interactions compared to conventional flat HMM platforms. The incorporated Au nanograting efficiently couples the incident TM-polarized plane wave into the high-k bulk plasmon polariton modes supported by the graphene–dielectric multilayers. This combined effect leads to strong field confinement, increased interaction volume with analytes in the surrounding water medium, and improved angular stability. Using the finite-difference time-domain (FDTD) method, the reflection spectra and resonant dip characteristics were analyzed under variations of structural parameters and graphene Fermi energy levels. Simulation results demonstrate that the proposed biosensor achieves a sensitivity of 5348 nm·RIU⁻¹ and a figure of merit of 26.36 RIU⁻¹, confirming its potential for selective and ultra-sensitive biomolecular detection.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210591","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":"New bio-inspired composite solar absorber with dynamic thermal regulation via phase change materials","authors":"Hamza Baroud,&nbsp;Fatima Djerfaf,&nbsp;Djalal eddine Bensafieddine,&nbsp;Tahar Aliouar,&nbsp;Sarah Guenou,&nbsp;El Tayeb Bentria","doi":"10.1007/s11082-025-08458-9","DOIUrl":"10.1007/s11082-025-08458-9","url":null,"abstract":"<div><p>Solar absorbers are critical to the advancement of renewable energy systems via solar to thermal conversion efficiency optimization. We present a triple bio-inspired hierarchical solar absorber with a simulated 98.2% AM1.5-weighted absorption. Its multiscale synergy of fractal tungsten for omnidirectional harvesting (&gt; 95% at 85° incidence) and MXene nano-arrays for high quality factor (Q) resonances (Q = 114.8 at 1068 nm) and near-perfect NIR capture (99.79% at 1068 nm) demonstrates a potential that outperforms that of existing absorbers. Integrated PCM microcapsules provide dynamic thermal management (60 °C isothermal plateau, 20–30 °C temperature reduction). Numerical simulations confirm strong field confinement and volumetric loss in high MXene-PCM interfaces. Thermal management provides material stability (simulated ΔT &lt; 0.05 °C at 4727 °C) under a flux of 1000 W/m². The structure enhances thermal homogeneity by 10,000 times, setting new standards for deployable solar systems.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210989","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":"Formation of an optical rejection filter at the optical fiber end facet during the deposition of quasi-ordered C-Ag films","authors":"Alexey Kucherik,&nbsp;Anton Osipov,&nbsp;Vlad Samyshkin,&nbsp;Andrey Abramov,&nbsp;Roman Ponomarev,&nbsp;Anastasia Gordeeva","doi":"10.1007/s11082-025-08482-9","DOIUrl":"10.1007/s11082-025-08482-9","url":null,"abstract":"<div><p>This study presents a method for fabricating optical filters on the end facet of an optical fiber by depositing multilayer coatings of linear carbon stabilized with silver nanoparticles. A semi-automated film deposition setup is proposed, utilizing a droplet deposition technique for water-based colloidal systems. The transmission spectra of filters with 10, 20, and 30 layers are measured. The results demonstrate that the transmission spectrum narrows as the number of layers increases, with the central spectral region shifting toward a wavelength of 1100 nm. The study demonstrates a fast and technically feasible approach for fabricating optical notch filters on the optical fiber end facet.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210991","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":"Graphene-based frequency-reconfigurable slot antenna with gain enhancement using integrated metasurface for terahertz applications","authors":"Amany A. Megahed,&nbsp;Marwa E. Mousa,&nbsp;Ahmed J. A. Al-Gburi,&nbsp;Rania Hamdy Elabd","doi":"10.1007/s11082-025-08464-x","DOIUrl":"10.1007/s11082-025-08464-x","url":null,"abstract":"<div><p>This paper presents a novel Frequency-Reconfigurable Slot Antenna (FRSA) designed for terahertz (THz) applications, enhanced through the integration of a metasurface reflector (MSR). The antenna structure is fabricated on a flexible polyimide substrate and achieves reconfigurability via eight graphene-based switches that dynamically control the surface impedance. A 5 × 5-unit cell metasurface, placed 205 μm beneath the antenna, is employed to improve the radiation characteristics. Parametric simulations reveal that the antenna can operate across ten distinct switching states, enabling resonant frequencies ranging from 0.885 THz to 1.53 THz. The integration of the MSR results in noticeable improvements in radiation efficiency (up to 98%) and gain (up to 9.9 dB), whereas maintaining effective impedance matching in all states. The proposed design demonstrates excellent potential for use in flexible, miniaturized, and high-performance THz communication systems, offering dynamic spectral adaptability and improved radiation performance through metasurface-assisted tuning.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210994","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":"Improving the performance of plasmonic nanolasers in the visible region using SLR modes of optimized silver nanocylinder arrays: reducing threshold and enhancing emission","authors":"Nasrin Sepahvand,&nbsp;Mohsen Bahrami","doi":"10.1007/s11082-025-08466-9","DOIUrl":"10.1007/s11082-025-08466-9","url":null,"abstract":"<div><p>Given the light-based technology, it seems inevitable in the future to develop miniature coherent light sources (micro- and nanolasers) with low energy consumption. Metal nanoparticles have a remarkable ability to concentrate light energy at very small dimensions and mode volumes on the nanometer scale, allowing the control and amplification of light on the nanoscale. Meanwhile, by embedding a periodic array of metal nanoparticles in the gain medium, by utilizing plasmonic resonances, and by overcoming the optical loss of the gain medium, one can provide a promising platform for enhanced nanolaser performance. Using the finite-difference time-domain (FDTD) numerical method, this study deals with designs of the nanolaser based on a periodic array of silver (Ag) nanocylinders embedded in a Rhodamine (R6G) gain medium. This study tries to optimize the characteristics of the laser components under different operating conditions, across several consecutive steps, to achieve more effective and efficient performance of the designed laser. Calculations indicate that by means of the Gaussian radiation pumping, and by optimizing both the concentration and the thickness of the gain medium at 80 nm, one can significantly decrease the lasing threshold by minimizing optical losses. Moreover, by keeping the gain medium thickness and concentration constant, one will observe a further decrease in the lasing threshold and an increase in laser emission intensity through adjusting the silver nanocylinder array period and leveraging the strong optical fields of the surface lattice resonance (SLR) mode at a 375 nm period. Furthermore, by optimizing the radius and height of the nanocylinders at 50 nm and 45 nm, respectively, one can achieve a lower lasing threshold at a pump fluence of 1.06 <span>(:text{m}text{J}:{text{c}text{m}}^{-2})</span> through the strong energy coupling between plasmonic modes and gain molecules, with a narrow spectral width. This research can significantly contribute to the design and development of low-lasing threshold plasmonic nanolasers in the visible spectrum, offering higher efficiency for use in optical sensors, photonic circuits, and other plasmonic devices.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210572","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":"Unlocking the optoelectronic and thermoelectric properties of Ba2ZnTeO6: a promising double perovskite for sustainable energy harvesting technologies","authors":"M. M. Rabbi,&nbsp;Mst. A. Khatun","doi":"10.1007/s11082-025-08471-y","DOIUrl":"10.1007/s11082-025-08471-y","url":null,"abstract":"<div><p>Pursuing a novel thermoelectric material with a high figure of merit is a compelling goal with strong commercial motivation due to several high-impact applications and market drivers. This work theoretically investigates the structural, mechanical, electronic, optical, and thermoelectric properties of Ba₂ZnTeO₆ using DFT and Boltzmann transport theory within the WIEN2k framework. The thermodynamical, mechanical, and dynamical stability is confirmed through calculated formation energy, elastic constants and phonon dispersion, respectively, and the compound is identified as ductile. The electronic structure reveals a semiconducting nature with a direct band gap (1.80 eV), making it suitable for optoelectronic applications. Optical analyses show significant absorption in the UV region. It is noteworthy that Ba₂ZnTeO₆ exhibits a low total thermal conductivity of 2.34 Wm⁻¹ K⁻¹ and a figure of merit (<i>ZT</i>) of 0.37 at 300 K. Ba₂ZnTeO₆ exhibits a high Seebeck coefficient, moderate electrical conductivity, and ultra-low lattice thermal conductivity, resulting in an exceptional figure of merit (<i>ZT</i>), especially at elevated temperatures, making it promising thermoelectric material. The dimensionless figure of merit (<i>ZT</i>) of Ba₂ZnTeO₆ reaches 0.89 at 1200 K, highlighting its considerable potential as a high-temperature thermoelectric material. Owing to its remarkable thermoelectric efficiency, intrinsic thermodynamic stability, and environmentally benign composition, Ba₂ZnTeO₆ offers a promising and sustainable alternative to conventional toxic lead-based compounds. These attributes collectively position Ba₂ZnTeO₆ as a viable candidate for next-generation thermoelectric applications in renewable and eco-friendly energy technologies.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210995","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":"Flexible metasurfaces for direct SERS identification of single extracellular vesicles","authors":"Andrey Ivanov,&nbsp;Konstantin Mochalov,&nbsp;Denis Korzhov,&nbsp;Milena Shestopalova,&nbsp;Igor Bykov,&nbsp;Konstantin Afanasev,&nbsp;Alexander Smyk,&nbsp;Alexander Shurygin,&nbsp;Andrey K. Sarychev","doi":"10.1007/s11082-025-08473-w","DOIUrl":"10.1007/s11082-025-08473-w","url":null,"abstract":"<div><p>We investigate the enhancement of the electromagnetic field and the surface-enhanced Raman scattering (SERS) effect in a silver-plastic metasurface. Localized plasmon modes are excited and manifest as pronounced local maxima of the electric field, spatially confined within the dented regions of the metasurface where the silver layer exhibits minimal thickness. The spectral position of these plasmonic resonances is highly sensitive to both the silver film thickness and the non-uniformity of its distribution across the metasurface. Experimental results show good agreement with numerical simulations performed for a double-periodic metal-dielectric metasurface. The fabricated metasurface was evaluated as a SERS substrate for direct detection of individual extracellular vesicles from the Human Embryonic Kidney 293T cell line.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210549","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":"Pulse pump laser induced random lasing in the CdSe quantum dots beads","authors":"Longwu Li,&nbsp;Zhen-Zhen Shang,&nbsp;Xiaofei Dong,&nbsp;Vivi Ma","doi":"10.1007/s11082-025-08476-7","DOIUrl":"10.1007/s11082-025-08476-7","url":null,"abstract":"<div><p>Strong pump laser pulses excite CdSe quantum dot beads functionalized with COOH groups, utilizing their intrinsic photons. These photons undergo scattering by the CdSe quantum dot beads, with a significant fraction of the visible photons emitted from the devices originating from this scattering process. The scattering accelerates the photons, redirecting them toward their gain molecules within nanoseconds. Further acceleration occurs via the dye molecular potential, which encodes its structure and dynamics onto the CdSe quantum dot beads. Our experiments with laser pulses reveal that laser-induced photon lasing exhibits high sensitivity to the properties of the CdSe quantum dot beads. The random lasing process selectively targets quantum dots containing dye molecules with specific gain characteristics, guiding photons along distinct trajectories. Consequently, the photons re-collide from varying directions, dictated by the scattering behavior of the quantum dot beads. This directional dependence results in preferential forward or backward scattering along the light propagation paths. Notably, the nonlinear light intensity—reaching several percent—can be reversed for photons re-colliding from the closed path of the microcavity. This intensity sensitivity in laser-induced photon lasing provides new opportunities for probing ultrafast laser dynamics.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210553","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}