Photonics and Nanostructures-Fundamentals and Applications最新文献

{"title":"Taking advantage of an axisymmetric plasmonic structure and grooves to nanofocus and ultraenhance a radially polarized electric field","authors":"Fatemeh Salmeh,&nbsp;Masoud Mohebbi","doi":"10.1016/j.photonics.2024.101240","DOIUrl":"10.1016/j.photonics.2024.101240","url":null,"abstract":"<div><p>This study investigates the enhancement and nanofocusing of a radially polarized electric field by a conical plasmonic structure (CPS). The CPS is a dielectric cone with nanometer metal cladding on a dielectric substrate. Concentric circular slanted grooves are etched on the surface of the dielectric substrate. These grooves converge the incident field on the structure. Angled periodic gratings are engraved on the CPS metal surface near the tip, creating a plasmonic momentum and contributing to the field enhancement above the apex. The symmetry of the incident radially polarized light and the structure significantly boosts nanofocusing and field enhancement. The optimal width of the nanofocusing and the electric field enhancement factor obtained are approximately 9 nm and 30000, respectively. Because of its impressive effects, this scheme is a valuable tool for plasmonic, optics, and laser applications.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"59 ","pages":"Article 101240"},"PeriodicalIF":2.7,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927177","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":"Chip-scale mid-infrared digitalized computational spectrometer powered by silicon photonics MEMS technology","authors":"Haoyang Sun ,&nbsp;Qifeng Qiao ,&nbsp;Chengkuo Lee ,&nbsp;Guangya Zhou","doi":"10.1016/j.photonics.2024.101231","DOIUrl":"10.1016/j.photonics.2024.101231","url":null,"abstract":"<div><p>Miniaturized spectrometers are attracting widespread interest due to the rising demand for portable spectroscopic applications. While the chip-scale spectrometers are widely investigated using silicon photonics technology, few research have addressed the need for a mid-infrared (MIR) integrated chip-scale spectrometer due to the lack of an effective reconfigurable photonics approach. In this paper, we present a novel solution using silicon photonics MEMS technology in the MIR region (3.6–5 µm wavelength range). We adopt a computational spectrometry scheme using the digitalized control of cascaded MEMS-tunable waveguide couplers. The MEMS waveguide couplers are operated in digital on/off mode, thus making the device immune to driving voltage fluctuations and robust for on-chip field sensing applications. Moreover, a comprehensive numerical analysis method is discussed to systematically evaluate the performance of the computational spectrometer, including its resolution and operational bandwidth. As a proof-of-concept, a chip-scale spectrometer realized by seven cascaded MEMS-actuated waveguide coupler is demonstrated. The sparse spectral reconstruction is demonstrated in the wavelength range from 3.65 to 4.1 µm and the dual-peaks reconstruction results indicate a resolution of 8 nm. Besides, response time and power consumption of the proposed device are experimentally characterized. Benefitting from good scalability, the spectral resolution can be further improved by increasing the number of waveguide coupler stages. The proposed work has the potential to realize lab-on-a-chip applications with advances in MIR silicon photonics. © 2001 Elsevier Science. All rights reserved.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101231"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1569441024000063/pdfft?md5=bed374d080af912058f5628b8b071dfd&pid=1-s2.0-S1569441024000063-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139587808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxidation effect on optical properties of integrated waveguides based on porous silicon layers at mid-infrared wavelength","authors":"A. Jaafar,&nbsp;S. Meziani,&nbsp;A. Hammouti,&nbsp;P. Pirasteh,&nbsp;N. Lorrain,&nbsp;L. Bodiou,&nbsp;M. Guendouz,&nbsp;J. Charrier","doi":"10.1016/j.photonics.2024.101244","DOIUrl":"https://doi.org/10.1016/j.photonics.2024.101244","url":null,"abstract":"<div><p>Integrated sensors based on guided optical devices can efficiently and selectively detect molecules in the mid-infrared (mid-IR) spectral range, exploiting the vibrational and rotational modes of these molecules at these wavelengths. In this work, a ridge waveguide based on porous silicon (PSi) layers was developed by electrochemical etching followed by a photolithographic process. The ridge waveguide is capable of propagating light in the mid-IR range (3.90–4.35 µm) with optical losses of approximately 10 dB/cm. An oxidation study was performed to stabilize the porous structure and identify the optimal oxidation degree, that allow mid-IR light to propagate in a ridge waveguide based on PSi material for sensing application. The results showed that the ridge waveguide remains capable of propagating light after undergoing partial oxidation at 300 °C and 600 °C (15% and 36% of the oxidation degree respectively) with optical losses of around 30 dB/cm and 60 dB/cm at the wavelength of 4.1 µm, respectively.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101244"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139942499","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":"Reverse design of multifunctional demultiplexing devices","authors":"Zhibin Wang,&nbsp;Zhengyang Li,&nbsp;Xuwei Hou,&nbsp;Jiutian Zhang","doi":"10.1016/j.photonics.2024.101246","DOIUrl":"https://doi.org/10.1016/j.photonics.2024.101246","url":null,"abstract":"<div><p>A novel direct binary search algorithm based on rotation (RDBS) is proposed in this paper. A 1*2 ultra-compact 2.4*3.6µm² multimode wavelength demultiplexer (DEMUX) is designed in reverse, which is roughly two orders of magnitude smaller than the size of a conventional waveguide device. It can simultaneously perform wavelength demultiplexing and mode conversion. This DEMUX separates the 1310 and 1550 nm wavelengths while converting the input light from the fundamental transverse electric mode (TE0) to the first-order transverse electric mode (TE1). The simulation results using RDBS show that the insertion loss(<span><math><mrow><mi>I</mi><mi>L</mi></mrow></math></span>) of the upper channel (wavelength 1310 nm) is −0.9644 dB, the <span><math><mrow><mi>I</mi><mi>L</mi></mrow></math></span> of the lower channel (wavelength 1550 nm) is −0.9752 dB, and the crosstalk values(CT) are −10.079 dB and −9.261 dB, respectively.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101246"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140014325","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":"Development of ZnO and Si semiconductor-based ultraviolet photodetectors enhanced by laser-ablated silver nanoparticles","authors":"Abdullah Marzouq Alharbi ,&nbsp;Naser M. Ahmed ,&nbsp;Azhar Abdul Rahman ,&nbsp;Nurul Zahirah Noor Azman ,&nbsp;Sameer Algburi ,&nbsp;Ismael.A. Wadi ,&nbsp;Ayed M. Binzowaimil ,&nbsp;Osamah Aldaghri ,&nbsp;Khalid Hassan Ibnaouf","doi":"10.1016/j.photonics.2024.101228","DOIUrl":"10.1016/j.photonics.2024.101228","url":null,"abstract":"<div><p><span><span><span>The present study employs a cost-effective laser ablation technique in combination with the RF sputtering method to successfully synthesize silver </span>nanoparticles encapsulated by zinc oxide on a </span>silicon<span> (Si) substrate. This synthesis approach aims to enhance the efficiency of photodetector<span> devices while concurrently reducing material expenses, thereby promoting advancements in photodetector applications. The incorporation of various plasmonic nanoparticles (NPs) into the photodetector's architecture is demonstrated as a means to substantially improve the photoresponse of UV photodetectors. Three distinct samples, denoted as AgNPs/Si, AgNPs/ZnO/Si, and ZnO/AgNPs/Si, underwent comprehensive analysis and characterization of their morphological attributes, crystal structures, elemental composition, and optical properties. The UV photodetection efficacy of these samples was evaluated by subjecting them to 385 nm UV light at different bias voltages. The current-voltage (I-V) characteristics of the ZnO/AgNPs/Si photodetector revealed significantly enhanced conductivity in comparison to the AgNPs/Si and AgNPs/ZnO/Si counterparts. Remarkably, the ZnO/AgNPs/Si photodetector exhibited the highest responsivity value of 132 A/W, accompanied by quantum efficiency of 429.88, sensitivity of 31,400%, gain of 315, detectivity of 18 × 10</span></span></span>¹⁰ Jones, and a noise equivalent power (NEP) of 0.556 × 10^–13 W. These findings underscore the efficacy of our innovative broadband photodetector, highlighting its potential for practical implementation. This research offers valuable insights into the enhancement of photodetector performance and its applicability in real-world scenarios.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101228"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139510468","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":"Ultra-wideband solar absorber based on double-polygonal metamaterial structures","authors":"Pengfei Sun ,&nbsp;Lijing Su ,&nbsp;Sihan Nie ,&nbsp;Xin Li ,&nbsp;Yaxin Zhou ,&nbsp;Yang Gao","doi":"10.1016/j.photonics.2024.101234","DOIUrl":"10.1016/j.photonics.2024.101234","url":null,"abstract":"<div><p>In this work, a novel solar absorber with wide angle tolerance and insensitivity to polarization is proposed. The upper layer of the absorber comprises two polygonal structures, which can achieve an absorption rate of 94.2% across a broad wavelength range of 2218 nm (584 nm - 2802 nm). The performance of the absorber is simulated and verified using the finite difference time domain (FDTD) method combined with impedance matching theory. Through examining the electromagnetic field distribution at absorption peaks, the physical mechanism is elucidated. Moreover, incorporating refractory metals and nonmetallic materials in its design enhances the stability of the absorber, making it suitable for various extreme environments. This indicates its potential applications in solar energy storage and solar thermal photovoltaic systems.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101234"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139667591","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":"Mid-infrared assisted transport at the nano-junction between graphene and a doped-diamond scanning probe","authors":"Tommaso Venanzi ,&nbsp;Maria Eleonora Temperini ,&nbsp;Leonetta Baldassarre ,&nbsp;Michele Ortolani ,&nbsp;Valeria Giliberti","doi":"10.1016/j.photonics.2024.101243","DOIUrl":"https://doi.org/10.1016/j.photonics.2024.101243","url":null,"abstract":"<div><p>We report mid-infrared photoconductive atomic-force microscopy (AFM) of a graphene sheet with doped-diamond AFM probes illuminated with a quantum cascade laser. The diamond probe ensures high mechanical and electrical stability. We observe a prominent photoconduction at finite biases that we interpret as the overcoming of a potential barrier formed at the graphene-diamond junction by free carriers excited by mid-infrared photons (220 meV photon energy). Moreover, we observe a small photo-thermoelectric effect of graphene under zero applied bias. We demonstrate that the use of diamond AFM probes for mid-infrared photoconductive AFM has great potential to investigate the nanometric inhomogeneities of the Fermi level and of the work function across integrated semiconductor devices.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101243"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S156944102400018X/pdfft?md5=6fed236b94fb15d32d69ca003bce04bb&pid=1-s2.0-S156944102400018X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139999410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly luminescent polyfluorene-based composite with CsPbX3 perovskite nanocrystals for light-emitting devices","authors":"M.A. Sandzhieva ,&nbsp;L.E. Zelenkov ,&nbsp;L.A. Otpushchennikov ,&nbsp;S. Miltsov ,&nbsp;E.V. Zhukova ,&nbsp;L.S. Litvinova ,&nbsp;S.A. Cherevkov ,&nbsp;I.M. Sevastianova ,&nbsp;D. Shestakov ,&nbsp;A.V. Yakimansky ,&nbsp;S.V. Makarov","doi":"10.1016/j.photonics.2024.101239","DOIUrl":"10.1016/j.photonics.2024.101239","url":null,"abstract":"<div><p>The rapid development of thin-film light emitting devices (LED) technologies has recently been associated with the superior optoelectronic properties of luminescent materials based on lead halide perovskite nanocrystals (NCs) due to their narrow emission line with high color purity. However, the large surface area of NCs leads to the need to use solvating ligands to prevent their agglomeration, which limits their use in optoelectronics. Here we develop a class of modular polyfluorene (PF) copolymer with 4-hydroxyphenyl-, diethylamino- and diethoxyphosphoryl- groups designed to stabilize perovskite NCs. We show that as-synthesized CsPbBr₃ NCs can easily be mixed with custom-designed PFs resulting in polymer/NCs composite that shows efficient Förster energy transfer (FRET) from PF to NC with green photoluminescence (PL). We also found that the NCs composite studied here can be used as an effective emissive layer in LED due to the strong interaction between polymer host and perovskite NCs providing an efficient charge transfer from the PF matrice to the NC emitter. The fabricated LED show excellent performance with a highest current efficiency of ∼25.2 cd A^–1. Our approach provides a low-cost and efficient way for light-emitting optoelectronic applications based on perovskite NCs.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101239"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139894129","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":"Graphene oxide-decorated hyrogel inverse opal photonic crystal improving colorimetric and fluorescent responses for rapid detection of lipocalin-1","authors":"Pham Hong Phong ,&nbsp;Han-Sheng Chuang ,&nbsp;Dao Thi Thuong ,&nbsp;Nguyen Ngoc Sang ,&nbsp;Nghiem Thi Ha Lien ,&nbsp;Nguyen Trong Nghia ,&nbsp;Nguyen Duc Toan ,&nbsp;Le Minh Thanh","doi":"10.1016/j.photonics.2024.101237","DOIUrl":"https://doi.org/10.1016/j.photonics.2024.101237","url":null,"abstract":"<div><p>In this paper, the colorimetric and fluorescent biosensors prepared from polyethylene glycol diacrylate (PEGDA)-based inverse opal photonic crystal (IOPC) decorated with graphene oxide (GO) (termed as GO-modified PEGDA-based IOPC) have been explored for simple and rapid semi-quantitative and quantitative detections of biomarker lipocaline-1 (LCN1) in tear at low level, respectively. We found that only after the concentration of GO (<em>C</em>_<em>GO</em>) was sufficiently high to create a thin GO layer due to intermolecular interactions between neighboring GO molecules on the PEGDA surface, the red-shift of the reflection peak position (λ_stb) became effective. This widening of the shift in λ_stb became significant when GO-modified PEGDA-based IOPC was selectively attached with LCN1 via the immunoassay, because the attachment with LCN1 caused a reverse shift in λ_stb. Correspondingly, the visualizable photonic color could vary in wider range depending on the concentration of LCN1 (<em>C</em>_{<em>LCN1</em>}), from orange color of blank solution to light blue color of solution containing LCN1 at <em>C</em>_{<em>LCN1</em>} of 0.06 mg/mL using <em>C</em>_<em>GO</em> = 2.5 mg/mL. For quantification, <em>C</em>_<em>GO</em> and enrichment time of LCN1 were optimized for getting the maximum fluorescence microscopy intensity. The diagram for the relationship between fluorescence intensity and <em>C</em>_LCN1 showed various advantages of GO-modified PEGDA-based IOPC over non-GO-modified PEGDA-based IOPC. Those were higher fluorescence intensity, wider linear range and higher detection sensitivity. Thus, our results revealed potential applications of GO-modified PEGDA-based IOPC in screening patients with diabetic retinopathy (DR) in early stage.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101237"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139975934","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 dual-purpose processor based on graphene hybrid plasmonic concentric resonators","authors":"Afshin Ahmadpour,&nbsp;Amir Habibzadeh-Sharif,&nbsp;Faezeh Bahrami-Chenaghlou","doi":"10.1016/j.photonics.2024.101245","DOIUrl":"https://doi.org/10.1016/j.photonics.2024.101245","url":null,"abstract":"<div><p>This paper presents systematic design and analysis of a dual-purpose integrated processor based on graphene hybrid plasmonic concentric add-drop microring resonators for fast differentiation and integration. The footprint of this processor is equal to 4 × 4.358 <em>μ</em>m², containing two concentric rings with small radii of 1679 and 1204 nm. Performance of the designed dual-purpose processor for the first and fractional-orders differentiation and integration has been analyzed by the three-dimensional finite-difference time-domain method in the frequency and time domains and the accuracy of the results has been confirmed using the formulas of the ideal math differentiator and integrator. From the point of view of the performance specifications, the designed dual-purpose temporal processor has excellent 3 dB bandwidth, insertion loss, energy efficiency, and accuracy in the first and fractional-orders differentiation and integration.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101245"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139986950","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}