Ultra‐Low BER Encrypted Communication Based on Self‐Powered Bipolar Photoresponse Ultraviolet Photodetector

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 15, 2024

Abstract Underwater visible light communication often faces risks such as susceptibility to external source interference, signal distortion, and information leakage. The cuprous oxide modified gallium nanorod arrays detector prepared in this study can generate bipolar photocurrents under dual‐wavelength ultraviolet without bias voltage. Based on it, the constructed self‐powered ASCII code system not only reduce power consumption but also significantly enhance anti‐interference capability. Furthermore, developed solar‐blind AMI HDB 3 ternary systems realize non‐visible secure automatic error correction. Notably, encrypted assembled using additive property of improve security reliability, whose bit rate is 0.26‰. This achievement contributes technical advancements underwater channel encryption provides valuable insights for further application coding techniques.

Language: Английский

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Low-dimensional van der Waals materials for linear-polarization-sensitive photodetection: materials, polarizing strategies and applications

Materials Futures, Journal Year: 2023, Volume and Issue: 3(1), P. 012301 - 012301

Published: Sept. 14, 2023

Abstract Detecting light from a wealth of physical degrees freedom (e.g. wavelength, intensity, polarization state, phase, etc) enables the acquirement more comprehensive information. In past two decades, low-dimensional van der Waals materials (vdWMs) have established themselves as transformative building blocks toward lensless optoelectronics, which is highly beneficial for optoelectronic system miniaturization. This review provides overview on recent development vdWM polarized photodetectors. To begin with, exploitation pristine 1D/2D vdWMs with immanent in-plane anisotropy and related heterostructures filterless polarization-sensitive photodetectors introduced. Then, we systematically epitomized various strategies to induce photosensitivity enhance degree photodetectors, including quantum tailoring, construction core–shell structures, rolling engineering, ferroelectric regulation, strain etc, emphasis fundamental principles. Following that, ingenious applications based multiplexing optical communications enhanced-contrast imaging, been presented. end, current challenges along future prospects this burgeoning research field underscored. On whole, depicts fascinating landscape next-generation high-integration multifunctional systems.

Language: Английский

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Negative Photoconductivity Transistors for Visuomorphic Computing

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(38)

Published: July 23, 2024

Abstract Visuomorphic computing aims to simulate and potentially surpass the human retina by mimicking biological visual perception with an artificial retina. Despite significant progress, challenges persist in perceiving complex interactive environments. Negative photoconductivity transistors (NPTs) mimic synaptic behavior achieving adjustable positive (PPC) negative (NPC), simulating “excitation” “inhibition” akin sensory cell signals. In environments, NPTs are desired for visuomorphic that can achieve a better sense of information, lower power consumption, reduce hardware complexity. this review, it is started introducing development process NPTs, while placing strong emphasis on device structures, working mechanisms, key performance parameters. The common material systems employed based their functions then summarized. Moreover, proceeded summarize noteworthy applications optoelectronic devices, including advanced multibit nonvolatile memory, logic gates, optical encryption, perception. Finally, prospects lie ahead ongoing addressed, offering valuable insights into optoelectronics comprehensive understanding significance.

Language: Английский

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Reconfigurable organic ambipolar optoelectronic synaptic transistor for information security access

Journal of Semiconductors, Journal Year: 2025, Volume and Issue: 46(2), P. 022406 - 022406

Published: Feb. 1, 2025

Abstract In this data explosion era, ensuring the secure storage, access, and transmission of information is imperative, encompassing all aspects ranging from safeguarding personal devices to formulating national security strategies. Leveraging potential offered by dual-type carriers for transportation employing optical modulation techniques develop high reconfigurable ambipolar optoelectronic transistors enables effective implementation destruction after reading, thereby guaranteeing security. study, a synaptic transistor based on poly (3-hexylthiophene) (P3HT) [[N,N-bis(2-octyldodecyl)-napthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)] (N2200) blend film was fabricated through solution-processed method. The resulting exhibited relatively large ON/OFF ratio 10 3 in both n- p-type regions, tunable photoconductivity light illumination, particularly with green light. photo-generated could be effectively trapped under gate bias, indicating its application mimicking behaviors. Furthermore, plasticity, including volatile/non−volatile excitatory/inhibitory characteristics, finely modulated electrical stimuli. These properties enable realization assisted burn reading. This study not only offers valuable insights advancement high-performance organic but also presents innovative ideas future access systems.

Language: Английский

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All‐in‐One 2D Molecular Crystal Optoelectronic Synapse for Polarization‐Sensitive Neuromorphic Visual System

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 27, 2024

Abstract Neuromorphic visual systems (NVSs) hold the potential to not only preserve but also enhance human capabilities. One such augmentation lies in harnessing polarization information from light reflected or scattered off surfaces like bees, which can disclose unique characteristics imperceptible eyes. While creating polarization‐sensitive optoelectronic synapses presents an intriguing avenue for equipping NVS with this capability, integrating functions sensitivity, photodetection, and synaptic operations into a singular device has proven challenging. This integration typically necessitates distinct functional components each performance metric, leading intricate fabrication processes constraining overall performance. Herein, pioneering linear polarized sensitive organic phototransistor (OPT) based on 2D molecular crystals (2DMCs) highly integrated, all‐in‐one functionality, is demonstrated. By leveraging superior crystallinity thinness of 2DMC, OPT exhibits comprehensive performance, including dichroic ratio up 3.85, high responsivity 1.47 × 10 4 A W −1 , adept emulation biological synapse functions. sophisticated application noncontact fingerprint detection achieves 99.8% recognition accuracy, further highlights its potential. The 2DMC marks new era intelligent perception systems.

Language: Английский

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Two-dimensional layered material photodetectors: what could be the upcoming downstream applications beyond prototype devices?

Nanoscale Horizons, Journal Year: 2024, Volume and Issue: 9(10), P. 1599 - 1629

Published: Jan. 1, 2024

The applications of 2D material photodetectors in extensive fields, including imaging, health monitoring, tracking, logic operation, ultraviolet communications, automatic driving, and acoustic signal detection, have been introduced.

Language: Английский

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Data encryption based on field effect transistors and memristors

Deleted Journal, Journal Year: 2025, Volume and Issue: 2(1)

Published: Jan. 6, 2025

Abstract Information security is a critical requirement across military affairs, business, and daily life. Compared to traditional encryption methods, non-volatile memory offers significant advantages for data due its high-density storage, reliability, rewrite capability, fast transport, robust handleability, ease of integration into electrical circuits. This review comprehensively summarizes the latest advancements in functional materials design fabrication storage encryption. It highlights innovative techniques that leverage stimulus including optical, electrical, magnetic, humidity properties, covering both single-stimulus multi-stimulus synergistic effect. also systematically explores notable progress field Future research directions will focus on developing ultra-low power devices encryption, implementing multiple coordinated techniques, efficiently integrating advanced with algorithms meet evolving demands. By offering insights future trends challenges, this aims deepen understanding inspire perspectives ongoing development devices.

Language: Английский

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Activation of the Photosensitive Potential of 2D GaSe by Interfacial Engineering

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(17), P. 22207 - 22216

Published: April 17, 2024

Two-dimensional (2D) gallium selenide (GaSe) holds great promise for pioneering advancements in photodetection due to its exceptional electronic and optoelectronic properties. However, conventional photodetectors, 2D GaSe only functions as a photosensitive layer, failing fully exploit inherent potential. Herein, we propose an ultrasensitive photodetector based on out-of-plane GaSe/MoSe2 heterostructure. Through interfacial engineering, serves not the layer but also photoconductive gain passivation introducing photogating effect extending lifetime of photocarriers. Capitalizing these features, device exhibits performance, including responsivity 28 800 A/W, specific detectivity 7.1 × 1014 Jones, light on/off ratio 1.2 106, rise/fall time 112.4/426.8 μs. Moreover, high-resolution imaging under various wavelengths is successfully demonstrated using this device. Additionally, showcase generality design by activating potential with other transition metal dichalcogenides (TMDCs) such WSe2, WS2, MoS2. This work provides inspiration future development high-performance shining spotlight

Language: Английский

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Control of positive and negative photo- and thermal-responses in a single PbI₂@CH₃NH₃PbI₃ micro/nanowire-based device for real-time sensing, nonvolatile memory, and logic operation

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(9), P. 2258 - 2270

Published: Jan. 1, 2024

CH

Language: Английский

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Blue sensitive sub-band gap negative photoconductance in SnO₂/TiO₂ NP bilayer oxide transistor

Nanoscale, Journal Year: 2024, Volume and Issue: 16(17), P. 8504 - 8513

Published: Jan. 1, 2024

Large negative photoconductance (NPC) of SnO 2 /TiO nanoparticles (NPs) heterostructure has been observed with thin film transistor (TFT) geometry and investigated using sub-bandgap light (blue) illumination.

Language: Английский

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