Results 21 to 30 of about 9,351 (261)
Systematic Review on Human Skin-Compatible Wearable Photoplethysmography Sensors
Applied Sciences, 2021 The rapid advances in human-friendly and wearable photoplethysmography (PPG) sensors have facilitated the continuous and real-time monitoring of physiological conditions, enabling self-health care without being restricted by location.
Inho Lee +5 more
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Near-Infrared Ge Photodiodes for Si Photonics: Operation Frequency and an Approach for the Future
IEEE Photonics Journal, 2010 Operation frequency is discussed for near-infrared photodiodes (PDs) using Ge layers on Si, which are indispensable for the photonic-electronic convergence on an Si chip.
Yasuhiko Ishikawa, Kazumi Wada
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Modelling and Design of a Dual Depletion PIN Photodiode as Temperature Sensor
Sensors, 2023 Nowadays, optical systems play an important role in communications. Dual depletion PIN photodiodes are common devices that can operate in different optical bands, depending on the chosen semiconductors.
Ricardo A. Marques Lameirinhas +2 more
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UVSQ-SAT, a Pathfinder CubeSat Mission for Observing Essential Climate Variables
Remote Sensing, 2019 The UltraViolet and infrared Sensors at high Quantum efficiency onboard a small SATellite (UVSQ-SAT) mission aims to demonstrate pioneering technologies for broadband measurement of the Earth’s radiation budget (ERB) and solar spectral irradiance ...
Mustapha Meftah +30 more
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Advanced Engineering Materials, EarlyView.Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali +5 more
wiley +1 more source
The Passive Operating Mode of the Linear Optical Gesture Sensor
Advances in Electrical and Computer Engineering, 2018 The study evaluates the influence of natural light conditions on the effectiveness of the linear optical gesture sensor, working in the presence of ambient light only (passive mode).
CZUSZYNSKI, K., RUMINSKI, J., WTOREK, J.
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Charge Generation and Recombination Pathways in All‐Polymer Bulk Heterojunction Solar Cells
Advanced Functional Materials, EarlyView.Multimodal spectroscopy and device analysis reveal how field‐dependent charge generation, transport limitations, and non‐geminate recombination govern performance losses in all polymer solar cells. The results identify the key processes controlling charge extraction and recombination, providing insights for the design of more efficient all‐polymer ...
Shahidul Alam +17 more
wiley +1 more source
Characterising the Photonic-Assisted Coherent Free-Space Link of Sub-THz Data Transmission
IEEE Access, 2023 This study demonstrates a measurement setup of an over-the-air (OTA) sub-THz link using a hybrid system of transmission comprising standard optical communications components and propagating the signal over 6 meters.
Mohanad Dawood Al-Dabbagh +4 more
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Advanced Functional Materials, EarlyView.This work presents a ligand‐pairing strategy that reconstructs lead sulfide quantum dot surfaces for efficient short‐wave infrared optoelectronics. A low‐reactivity thiourea precursor combined with hydrobromic acid enables monodisperse and fully passivated quantum dots.
Dongeon Kim +16 more
wiley +1 more source
Photodetectors for X- and γ-Ray Scintillators
East European Journal of PhysicsThe article analyzes X- and γ-ray detectors based on the ionizing and scintillation principles of operation. The effectiveness of using silicon p-i-n and p-n photodiodes in scintillation sensors for detecting visible photoluminescent radiation is ...
Mykola S. Kukurudziak +6 more
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