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SWIR-transparent silicon hot-carrier photodetector for unobstructed real-time laser power monitoring

Optica 2025年第5期12卷 654-665页

作者： Ryu, Eui-Hyoun Hwang, Sunghyun Kim, Nayeon Son, Ji-Hwan Han, Jae-Hoon Ahn, Jongtae Park, Donghee Seong, Tae-Yeon Lee, In-Ho Seoul02792 Korea Republic of Department of Materials Science and Engineering Korea University Seoul02841 Korea Republic of School of Electrical Engineering Korea University Seoul02841 Korea Republic of Korea University Department of Micro/Nano Systems Seoul02841 Korea Republic of Department of Physics Changwon National University Changwon51139 Korea Republic of

Optically transparent photodetectors are becoming essential components in next-generation photonic technologies such as augmented reality and light-field imaging. While transparent photodetectors have been extensively developed for the visible spectrum, extending this capability to the short-wavelength infrared (SWIR) regime remains a significant challenge. This is primarily due to the lack of suitable transparent electrodes and the difficulty in minimizing the thickness of light-absorbing layers. In this work, we demonstrate an SWIR-transparent silicon hot-carrier photodetector, enabled by an ultrathin silver film topped with a high-refractive-index overlayer, serving as a transparent electrode. The electrode design exploits destructive interference to minimize reflection, achieving an 86% transmittance at 1300 nm and a normalized transmittance of 123% relative to a silicon substrate. Integrating this electrode into a silicon substrate forms a metal–silicon Schottky junction for SWIR photon detection through hot-carrier injection, with photon absorption confined to a sub-10 nm metal layer. By leveraging the optical transparency of our photodetector, we demonstrate a laser power monitoring strategy that enables real-time optical power measurements without compromising the spatial profile of the laser beam and altering its optical path. This work paves the way for compact, streamlined designs in applications such as optical data transmission and light detection and ranging (LiDAR), where continuous laser power monitoring is crucial. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Photodetectors

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Adaptive Event-Triggered Fast Finite-Time Stabilization of High-Order Uncertain Nonlinear systems and its Application in Maglev systems

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IEEE Transactions on Cybernetics 2024年第3期54卷 1537-1546页

作者： Sun, Zong-Yao Zhou, Chao Wen, Changyun Chen, Chih-Chiang Institute of Automation Qufu Normal University Qufu273165 China Nanjing University of Aeronautics and Astronautics College of Automation Engineering Nanjing211106 China Nanyang Technological University School of Electrical and Electronic Engineering Jurong West639798 Singapore National Cheng Kung University Department of Systems and Naval Mechatronic Engineering Tainan70101 Taiwan

This article is concerned with the global fast finite-time adaptive stabilization for a class of high-order uncertain nonlinear systems in the presence of serious nonlinearities and constraint communications. By renovating the technique of continuous feedback domination to the construction of a serial of integral functions with nested sign functions, this article first proposes a new event-triggered strategy consisting of a sharp triggered rule and a time-varying threshold. The strategy guarantees the existence of the solutions of the closed-loop systems and the fast finite-time convergence of original system states while reaching a compromise between the magnitude of the control and the trigger interval. Quite different from traditional methods, a simple logic is presented to avoid searching all the possible lower bounds of trigger intervals. An example of the maglev system and a numerical example are provided to demonstrate the effectiveness and superiority of the proposed strategy. © 2013 IEEE.

关键词： Closed loop systems

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Incentive Designs for Learning Agents to Stabilize Coupled Exogenous systems 63

Incentive Designs for Learning Agents to Stabilize Coupled E...

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63rd IEEE Conference on Decision and Control, CDC 2024

作者： Certorio, Jair Martins, Nuno C. La, Richard J. Arcak, Murat Institute for Systems Research University of Maryland College Park Department of Electrical and Computer Engineering College ParkMD20740 United States University of California Department of Electrical Engineering and Computer Science BerkeleyCA94720 United States

ISBN: (纸本)9798350316339

We consider a large population of learning agents noncooperatively selecting strategies from a common set, influencing the dynamics of an exogenous system (ES) we seek to stabilize at a desired equilibrium. Our approach is to design a dynamic payoff mechanism capable of shaping the population's strategy profile, thus affecting the ES's state, by offering incentives for specific strategies within budget limits. Employing system-theoretic passivity concepts, we establish conditions under which a payoff mechanism can be systematically constructed to ensure the global asymptotic stability of the ES's equilibrium. In comparison to previous approaches originally studied in the context of the so-called epidemic population games, the method proposed here allows for more realistic epidemic models and other types of ESs, such as predator-prey dynamics. The stability of the equilibrium is established with the support of a Lyapunov function, which provides useful bounds on the transient states. © 2024 IEEE.

关键词： Lyapunov functions

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Design of an Electronically Controlled Biquadratic Filter Using Commercial ICs 13

Design of an Electronically Controlled Biquadratic Filter Us...

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13th International electrical engineering Congress, iEECON 2025

作者： Ritnathikul, Somkid Duangmalai, Danupat Kaewdang, Khanittha Kwuanphet, Settasuk Chalermpong, Thanawat Pitaksuttayaprot, Koson Phetchabun Rajabhat University Faculty of Agricultural and IndustrialTechnology Department of Computer Engineering Phetchabun6700 Thailand Ubon Ratchathani University Faculty of Engineering Department of Electrical and Electronic Engineering Ubon Ratchathani34190 Thailand Nakhon Phanom University Faculty of Industrial Technology Department of Electrical Engineering Nakhon Phanom48000 Thailand Phetchabun Rajabhat University Faculty of Agricultural and Industrial Technology Department of Electronics and Automation Systems Engineering Phetchabun6700 Thailand

ISBN: (纸本)9798331543952

This paper presents an electronically controlled biquadratic filter designed for precise frequency selection in applications such as audio processing, telecommunications, and cochlear implants. The design utilizes AD830, AD844, and LM13700 integrated circuits, facilitating high-pass, band-pass, and low-pass responses with improved stability and real-time tunability. PSPICE simulations validate the filter's adaptability and performance, demonstrating its effectiveness in dynamic environments and its suitability for high-frequency applications requiring flexible frequency control. The results indicate a calculated pole frequency of 2.23 MHz, while simulations yield a slightly lower value of 2.0 MHz, affirming the design's practical viability and alignment with theoretical expectations. © 2025 IEEE.

关键词： LSI circuits

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Mitigating Sub-Synchronous Resonance with Adaptive Phase-Dependent Switching in Static Sub Synchronous Series Compensator

Mitigating Sub-Synchronous Resonance with Adaptive Phase-Dep...

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2024 IEEE Global Energy Conference, GEC 2024

作者： Shahzad, Sulman Alsenani, Theyab R. Kilic, Heybet Department of Electrical Engineering Islamia University of Bahawalpur Bahawalpur63100 Pakistan Department of Electrical Engineering College of Engineering in Al-Kharj Prince Sattam Bin Abdulaziz University Al-Kharj11942 Saudi Arabia Department of Electric Power and Energy Systems Dicle University Diyarbakır21280 Turkey

ISBN: (纸本)9798331532611

Sub-synchronous resonance (SSR) is a critical challenge in power systems, particularly in series-compensated transmission lines, where interactions between electrical and mechanical components can lead to damaging oscillations. The Static Synchronous Series Compensator (SSSC), a FACTS device, has proven effective in mitigating SSR by injecting controllable series voltage to modify line impedance dynamically. However, conventional SSSC control strategies, often based on proportional-integral (PI) controllers, can exhibit limited responsiveness during transient disturbances. This paper explores the enhancement of SSSC performance through Phase-Dependent Switching (PDS), an adaptive technique that modifies switching behavior based on real-time phase conditions. Using detailed time-domain simulations, we demonstrate that the PDS-enhanced SSSC achieves faster transient response, better damping of oscillations, and improved stability margins compared to traditional methods. The results also highlight challenges such as increased switching losses and computational demands, necessitating further research into optimized algorithms and hardware solutions. These findings underscore the potential of PDS in improving SSR damping, ensuring more reliable and efficient power system operation. ©2024 IEEE.

关键词： Damping

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Model-Free Voltage Calculation in Power systems: Applying Gaussian Process Regression for Real-Time Voltage Estimation in DER-Rich Low-Voltage Networks

Model-Free Voltage Calculation in Power Systems: Applying Ga...

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2024 IEEE Global Energy Conference, GEC 2024

作者： Shahzad, Sulman Alsenani, Theyab R. Abbasi, Muhammad Abbas Kilic, Heybet Department of Electrical Engineering Islamia University of Bahawalpur Bahawalpur63100 Pakistan Department of Electrical Engineering College of Engineering in Al-Kharj Prince Sattam Bin Abdulaziz University Al-Kharj11942 Saudi Arabia Department of Electric Power and Energy Systems Dicle University Diyarbakır21280 Turkey

ISBN: (纸本)9798331532611

This paper explores a model-free approach to voltage calculation in low-voltage (LV) networks impacted by distributed energy resources (DERs) using Gaussian Process Regression (GPR). Traditional voltage calculations depend on detailed network models, which are often unavailable or outdated in LV networks. As DER penetration increases, such as photovoltaic (PV) systems and electric vehicles (EVs), accurate voltage predictions become essential for network stability. This study applies GPR as a probabilistic, nonparametric alternative that can capture complex relationships between power and voltage without relying on physical models. The GPR model is trained on synthetic smart meter data under varying DER scenarios—low (20%), medium (50%), and high (100%) penetration levels. Key findings indicate that GPR achieves high accuracy in low and medium penetration levels, with Root Mean Square Error (RMSE) values of 0.12 and 0.22, respectively, and adapts to increased uncertainty at higher penetration levels, providing robust prediction intervals. These results suggest that GPR offers a practical, scalable solution for real-time voltage estimation in DER-rich LV networks. ©2024 IEEE.

关键词： Gaussian distribution

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ARCH: Automatic Roaming-contract Handler for Seamless 6G System to Provide Trusted and Highly Available Network Access 23

ARCH: Automatic Roaming-contract Handler for Seamless 6G Sys...

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29th Annual International Conference on Mobile Computing and Networking, MobiCom 2023

作者： Tenn, Kíng-Pîng Ho, Po-Han Chen, Hong-Yen Lin, Tsung-Nan Department of Electrical Engineering PhD Program in Cybersecurity National Taiwan University Taipei60005429 Taiwan

ISBN: (纸本)9781450399906

It is expected to be pervasive sensors to integrate physical and digital world. Low-latency and wide-covering networks are hence urged, which lead to costly infrastructure. We are proposing ARCH based on smart contract and Self-sovereign Identity (SSI), to provide telecoms a trusted and transparent multilateral platform sharing their infrastructure to decrease the deployment and agency cost, and carbon emission. © 2023 Owner/Author(s).

关键词： Smart contract

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An Efficient Method to Estimate Admittance of Black-boxed Inverter-based Resources for Varying Operating Points

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CSEE Journal of Power and Energy systems 2024年第1期10卷 421-426页

作者： Weihua Zhou Bin Liu Nabil Mohammed Behrooz Bahrani Department of Electrical and Computer Systems Engineering Monash UniversityMelbourne 3800Australia Energy Centre Commonwealth Scientific and Industrial Research Organisation(CSIRO)Newcastle 2300Australia.He is now with the Network Planning DivisionTransgridSydney 2000Australia

Traditional analytical approaches for stability assessment of inverter-based resources(IBRs),often requiring detailed knowledge of IBR internals,become impractical due to IBRs’proprietary *** measurements,relying on electromagnetic transient simulation or laboratory settings,are not only time-intensive but also operationally inflexible,since various non-linear control loops make IBRs’admittance models operating-point ***,such admittance measurements must be performed repeatedly when operating point *** avoid time-consuming and cumbersome measurements,admittance estimation for arbitrary operating points is highly ***,existing admittance estimation algorithms usually face challenges in versatility,data demands,and *** this challenge,this letter presents a simple and efficient admittance estimation method for blackboxed IBRs,by utilizing a minimal set of seven operating points to solve a homogeneous linear equation *** studies demonstrate this proposed method ensures high accuracy across various types of *** accuracy is satisfying even when non-negligible measurement errors exist.

关键词： Admittance estimation black box inverterbased resource measurement error operating point

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An IoMT-Based Incremental Learning Framework with a Novel Feature Selection Algorithm for Intelligent Diagnosis in Smart Healthcare

IEEE Transactions on Machine Learning in Communications and ...

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IEEE Transactions on Machine Learning in Communications and Networking 2024年 2卷 370-383页

作者： Sai, Siva Bhandari, Kartikey Singh Nawal, Aditya Chamola, Vinay Sikdar, Biplab Department of Computer Science and Information Systems Pilani Campus Pilani333031 India Microsoft Campus Gachibowli Telangana Hyderabad500032 India Department of Electrical and Electronics Engineering Pilani Campus Pilani333031 India Pilani Campus Pilani333031 India National University of Singapore Department of Electrical and Computer Engineering Cluny Road Singapore117583 Singapore

Several recent research papers in the Internet of Medical Things (IoMT) domain employ machine learning techniques to detect data patterns and trends, identify anomalies, predict and prevent adverse events, and develop personalized patient treatment plans. Despite the potential of machine learning techniques in IoMT to revolutionize healthcare, several challenges *** conventional machine learning models in the IoMT domain are static in that they were trained on some datasets and are being used for real-time inferencing data. This approach does not consider the patient's recent health-related data. In the conventional machine learning models paradigm, the models must be re-trained again, even to incorporate a few sets of additional samples. Also, since the training of the conventional machine learning models generally happens on cloud platforms, there are also risks to security and privacy. Addressing these several issues, we propose an edge-based incremental learning framework with a novel feature selection algorithm for intelligent diagnosis of patients. The approach aims to improve the accuracy and efficiency of medical diagnosis by continuously learning from new patient data and adapting to patient conditions over time, along with reducing privacy and security issues. Addressing the issue of excessive features, which might increase the computational burden on incremental models, we propose a novel feature selection algorithm based on bijective soft sets, Shannon entropy, and TOPSIS(Technique for Order Preference by Similarity to Ideal Solution). We propose two incremental algorithms inspired by Aggregated Mondrian Forests and Half-Space Trees for classification and anomaly detection. The proposed model for classification gives an accuracy of 87.63%, which is better by 13.61% than the best-performing batch learning-based model. Similarly, the proposed model for anomaly detection gives an accuracy of 97.22%, which is better by 1.76% than the best-performing b

关键词： Patient treatment

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Physical Processes in Vacuum Circuit Breakers under Switching Overvoltages

Physical Processes in Vacuum Circuit Breakers under Switchin...

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2023 International Conference on Industrial engineering, Applications and Manufacturing, ICIEAM 2023

作者： Vorkunov, O.V. Samofalov, Yu. O. Butakov, V.M. Kazan State Power Engineering University Department of Electric Power Systems and Networks Kazan Russia Kazan State Power Engineering University Department of Electrical Complexes and Systems Kazan Russia

ISBN: (纸本)9781665475952

Currently, vacuum switching devices are actively implemented in 6 (10) kV power grids in Russia due to a number of their advantages in comparison with other types of circuit breakers. However, their use does not solve the problem of overvoltages, and sometimes exacerbates it, because commutation with such switches can be accompanied by multiple repeated arc re-ignitions and high-frequency overvoltages. A simulation model of vacuum circuit breaker was created using the program MatLAB Simulink in this work. Its work was tested in the virtually created electric network 110/6 kV, consisting of a power supply and the power unloaded transformer. Subsequently, to assess the overvoltage magnitude influence arising during the circuit breaker contacts switching, the computer model was supplemented by a nonlinear overvoltage limiter simulation model (OPN). Voltages and currents oscillograms arising at vacuum circuit breakers switching, for three phases: A, B, C, of the simulated electric network were obtained. The overvoltage value dependence on the transformer power was obtained by introducing different power ratings power transformer models into the electrical network. The overvoltage limitation analysis by means of a non-linear overvoltage limiter has been carried out. © 2023 IEEE.

关键词： Oscillographs

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