- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Optical memory characteristics of solution-processed organic transistors with self-organized organic floating gates for printable multi-level storage devices
摘要： Exploring optical memory functions in nonvolatile organic field-effect transistor (OFET) memories with top-gate/bottom-contact (TG/BC) configurations can offer effective routes for developing printable, high-density organic memory circuits capable of multi-level data storage. Here, we use a solution process to fabricate TG/BC OFET devices with organic floating-gate structures and investigate their memory characteristics under light illumination. A solution-processable organic composite of 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) and poly(methylmethacrylate) is employed to self-organize organic floating-gate structures on a solution-processed semiconductor layer composed of poly(3-hexylthiophene) (P3HT). The floating-gate OFET devices programmed with blue, green, and red light exhibit large threshold voltage (Vth) shifts of approximately 30 V and stable charge retention characteristics even under light illumination. The devices also exhibit high sensitivity to incident light during programming, and the degree of Vth shift and the on-state current can be tuned using light and programming voltage to facilitate distinct storage and readout of multi-level data.
关键词： floating-gate memory,organic field-effect transistor,top-gate/bottom-contact configuration,multi-level data storage,solution-processable organic material
更新于2025-09-23 15:23:52
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Novel Scheme For Extracting Maximum Power From Fa?§ade Based Building Integrated Photovoltaics
摘要： Providing top-k query services is relevant for storage servers which collect valuable ?les/data and process queries for data owners and mobile users. However, this kind of service could incur severe security concerns, because hackers or even the managers/administrators of the servers may steal important data sets and deceive users into responding to forged or incomplete query results. Therefore, these data sets need to be preserved in privacy, and moreover, the users should have the capability to verify the authenticity and integrity of the query results. As users will demand distinct information with various preferences and time domains in the pragmatic world, the traditional top-k queries are insuf?cient to satisfy their demands. To solve the problem, we provide the functional top-k queries in multi-dimensional space, such that the users can launch queries on the conjunction and sum of the dimensions/attributes. Some recent works have studied how to preserve data privacy and/or integrity for top-k queries on data storage applications. However, these prior works are limited to traditional top-k queries in preserving data privacy and/or integrity without permitting to systematically process top-k queries over encrypted domain in multi-dimensional space and without providing an ef?ciently veri?able mechanism for the corresponding query results. In this paper, we propose an ef?cient and effective method, called SFTopk, which addresses more challenging security problems in data privacy and veri?able functional top-k queries in multi-dimensional space. From performance evaluation experiments, it is shown that our proposed method is much more ef?cient than the prior works in terms of communication overhead and computation cost.
关键词： functional top-k query,authenticity,data storage,integrity,correctness,Privacy
更新于2025-09-23 15:21:01
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Colors with plasmonic nanostructures: A full-spectrum review
摘要： Since ancient times, plasmonic structural coloring has inspired humanity; glassmakers achieved vibrant colors by doping glass with metal nanoparticles to craft beautiful objects such as the Roman Lycurgus cup and stained glass. These lovely color ?ltering effects are a consequence of the resonant coupling of light and free electrons in metal nanoparticles, known as surface plasmons. Thanks to the continuing improvement of nanofabrication technology, the dimensions of nanoparticles and structures can now be precisely engineered to form “optical nanoantennas,” allowing for control of optical response at an unprecedented level. Recently, the ?eld of plasmonic structural coloring has seen extensive growth. In this review, we provide an up-to-date overview of various plasmonic color ?ltering approaches and highlight their uses in a broad palette of applications. Various surface plasmon resonance modes employed in the plasmonic color ?ltering effect are discussed. We ?rst review the development of the pioneering static plasmonic colors achieved with invariant optical nanoantennas and ambient environment, then we address a variety of emerging approaches that enable dynamic color tuning, erasing, and restoring. These dynamic color ?lters are capable of actively changing the ?ltered colors and carrying more color information states than the static systems. Thus, they open an avenue to high-density data storage, information encryption, and plasmonic information processing. Finally, we discuss the challenges and future perspectives in this exciting research area.
关键词： information encryption,surface plasmons,dynamic color tuning,plasmonic information processing,plasmonic structural coloring,optical nanoantennas,high-density data storage
更新于2025-09-23 15:19:57
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[IEEE 2018 Asia Pacific Magnetic Recording Conference (APMRC) - Shanghai, China (2018.11.15-2018.11.17)] 2018 Asia-Pacific Magnetic Recording Conference (APMRC) - Miniaturization for Dual-Beam Super-Resolution Optical Data Storage System with Ultra-High Capacities
摘要： A minimized optical lens head for dual-beam super-resolution optical storage system which is based on Stimulated Emission Depletion (STED)-like process with Petabyte data capacity is proposed. The whole bulky optical path is simplified to a customized metasurface with a diameter of 50 m, which generates a focused Gaussian beam and a donut beam overlapped perfectly in space. The specially designed lens head offers a distinct performance of chromatic aberration-free design with adaptability to multiple dual-beam combinations.
关键词： Optical Data Storage System,Metasurfaces,Super-resolution
更新于2025-09-19 17:15:36
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Quantum dots on demand
摘要： The ability to create and erase three-dimensional patterns of perovskite quantum dots in glass using a femtosecond laser could bring new opportunities in displays, security marking and data storage.
关键词： displays,femtosecond laser,data storage,security marking,perovskite quantum dots
更新于2025-09-19 17:13:59
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[IEEE 2019 22nd International Multitopic Conference (INMIC) - Islamabad, Pakistan (2019.11.29-2019.11.30)] 2019 22nd International Multitopic Conference (INMIC) - Internal Power Reserve Estimation for Frequency Regulation in Storageless Photovoltaic System
摘要： Providing top-k query services is relevant for storage servers which collect valuable ?les/data and process queries for data owners and mobile users. However, this kind of service could incur severe security concerns, because hackers or even the managers/administrators of the servers may steal important data sets and deceive users into responding to forged or incomplete query results. Therefore, these data sets need to be preserved in privacy, and moreover, the users should have the capability to verify the authenticity and integrity of the query results. As users will demand distinct information with various preferences and time domains in the pragmatic world, the traditional top-k queries are insuf?cient to satisfy their demands. To solve the problem, we provide the functional top-k queries in multi-dimensional space, such that the users can launch queries on the conjunction and sum of the dimensions/attributes. Some recent works have studied how to preserve data privacy and/or integrity for top-k queries on data storage applications. However, these prior works are limited to traditional top-k queries in preserving data privacy and/or integrity without permitting to systematically process top-k queries over encrypted domain in multi-dimensional space and without providing an ef?ciently veri?able mechanism for the corresponding query results. In this paper, we propose an ef?cient and effective method, called SFTopk, which addresses more challenging security problems in data privacy and veri?able functional top-k queries in multi-dimensional space. From performance evaluation experiments, it is shown that our proposed method is much more ef?cient than the prior works in terms of communication overhead and computation cost.
关键词： functional top-k query,authenticity,data storage,integrity,correctness,Privacy
更新于2025-09-19 17:13:59
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Pt Nanoclusters Sandwiched between Hexagonal Boron Nitride and Nanographene as van der Waals Heterostructures for Optoelectronics
摘要： We report on the formation of nanoscopic heterostructures composed of the semimetal graphene, the metal platinum, and the insulator hexagonal boron nitride (h-BN). Both graphene and h-BN are chemically inert 2D materials with similar geometric but different electronic properties. Between these materials, a Pt nanoparticle array was encapsulated. Thereby, the h-BN/Rh(111) nanomesh served as a template for a well-ordered array of Pt nanoclusters, which were overgrown with graphene, forming single nano-heterostructures. We investigated this process in situ by high-resolution, synchrotron radiation-based XPS, and NEXFAS. The nanographene layers proofed tight against CO under the tested conditions. These nano-heterostructures could find a possible application in optoelectronics or as data storage material. At the same time, our approach represents a new route for the synthesis of nanographene.
关键词： nanoclusters,optoelectronics,hexagonal boron nitride,nanographene,data storage,graphene,platinum
更新于2025-09-12 10:27:22
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Reversible 3D laser printing of perovskite quantum dots inside a transparent medium
摘要： The three-dimensional (3D) patterning of semiconductors is potentially important for exploring new functionalities and applications in optoelectronics. Here, we show that it is possible to write on demand 3D patterns of perovskite quantum dots (QDs) inside a transparent glass material using a femtosecond laser. By utilizing the inherent ionic nature and low formation energy of perovskite, highly luminescent CsPbBr3 QDs can be reversibly fabricated in situ and decomposed through femtosecond laser irradiation and thermal annealing. This pattern of writing and erasing can be repeated for many cycles, and the luminescent QDs are well protected by the inorganic glass matrix, resulting in stable perovskite QDs with potential applications such as high-capacity optical data storage, information encryption and 3D artwork.
关键词： perovskite quantum dots,optical data storage,femtosecond laser,transparent medium,information encryption,3D laser printing,3D artwork
更新于2025-09-12 10:27:22
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Plasmonic hotspot in toroidal metamaterial
摘要： Toroidal dipole resonance under a normal incident excitation can be realized by designing a metallic circular groove with a depth asymmetry. Due to its specific radial charge current configuration, charges gather together on the central circular platform and form a plasmonic hotspot, covering a large circular region with a diameter of 200 nm, where E-field magnitude attains 34-time enhancement than that of the incident light, providing more potentials for energy harvesting or nanoparticle trapping, manipulating of light-matter interaction, and optical data storage.
关键词： toroidal dipole resonance,Plasmonic hotspot,energy harvesting,nanoparticle trapping,light-matter interaction,optical data storage,toroidal metamaterial
更新于2025-09-11 14:15:04
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Fullerene-Based Switching Molecular Diodes Controlled by Oriented External Electric Fields
摘要： Employing multi-scale in silico modeling we propose switching molecular diodes on the basis of endohedral fullerenes (fullerene switching diode, FSD), encapsulated with polar molecules of general type MX (M: metal, X: non-metal) to be used for data storage and processing. Here, we demonstrate for MX@C70 systems that the relative orientation of enclosed MX with respect to a set of electrodes connected to the system can be controlled by application of oriented external electric field(s). We suggest systems with two- and four-terminal electrodes, in which the source and drain electrodes help the current to pass through the device and help the switching between the conductive states of FSD via applied voltage. The gate electrodes then assist the switching by effectively lowering the energy barrier between local minima via stabilizing the transition state of switching process if the applied voltage between the source and drain is insufficient to switch the MX inside the fullerene. Using non-equilibrium Green’s function combined with density functional theory (DFT-NEGF) computations, we further show that conductivity of the studied MX@C70 systems depends on the relative orientation of MX inside the cage with respect to the electrodes. Therefore, the orientation of the MX inside C70 can be both enforced (“written”) and retrieved (“read”) by applied voltage. The studied systems thus behave like voltage-sensitive switching molecular diodes, that is a reminiscent of a molecular memristor.
关键词： molecular diodes,DFT-NEGF,data storage,fullerene,electric fields
更新于2025-09-11 14:15:04