Article
Computer Science, Hardware & Architecture
M. Alvarez-Roa, C. Alvarez-Roa, F. Fernandez-Aragon, T. Raddo, J. M. Garrido-Balsells, I Tafur-Monroy, A. Jurado-Navas
Summary: This paper presents a comprehensive analytical framework for studying the performance of a free-space optical communication system with spatial diversity and equal gain-combining technique. New analytical closed-form expressions are derived for the average bit error rate, considering different scenarios and generic coding schemes. Numerical results confirm the validity of the derived analytical expressions.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2022)
Review
Chemistry, Multidisciplinary
Preethu P. Satheesh, Hyeon-Sik Jang, Bhishma Pandit, S. Chandramohan, Keun Heo
Summary: Van der Waals (vdW) materials of transition metal dichalcogenides (TMD) family with semiconducting properties are currently a hot research topic in the field of optoelectronics. The ability to couple them with one another at atomic interface precision in a synergistic way opens up unprecedented opportunities to design photodetectors with excellent performance. This review provides a comprehensive understanding of the fundamental properties, optical identification, band gap nature, interlayer coupling, and recent advances in photodetectors based on ReS2, ReSe2, and their vdW heterostructures. Various conceptual device designs and potential applications are critically reviewed, and future prospects are discussed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Zheng Wang, Yan Cai, Haitao Jiang, Ziao Tian, Zengfeng Di
Summary: This article provides a comprehensive review on graphene-based silicon photonic devices and their applications in optical interconnects. Silicon photonics has the ability to integrate multiple core functions of optical interconnects into small-scale chips, offering cost-effective and scalable manufacturing capabilities. Graphene has emerged as a promising solution for traditional silicon photonics due to its exceptional electrical and optical properties, enabling pure phase modulation and ultrafast photodetection.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Fang Wang, Xuming Zou, Mengjian Xu, Hao Wang, Hailu Wang, Huijun Guo, Jiaxiang Guo, Peng Wang, Meng Peng, Zhen Wang, Yang Wang, Jinshui Miao, Fansheng Chen, Jianlu Wang, Xiaoshuang Chen, Anlian Pan, Chongxin Shan, Lei Liao, Weida Hu
Summary: Photodetectors based on perovskite materials have attracted attention for their good electrical and optical properties, but face issues such as nonideal quantum efficiency and high power consumption. Manipulating electrons and photons together is a promising strategy to improve detection efficiency.
Article
Multidisciplinary Sciences
Qian-Bing Zhu, Bo Li, Dan-Dan Yang, Chi Liu, Shun Feng, Mao-Lin Chen, Yun Sun, Ya-Nan Tian, Xin Su, Xiao-Mu Wang, Song Qiu, Qing-Wen Li, Xiao-Ming Li, Hai-Bo Zeng, Hui-Ming Cheng, Dong-Ming Sun
Summary: The challenges of developing neuromorphic vision systems inspired by the human eye involve the recreation of flexibility, sophistication, and adaptability of animal systems with computational efficiency and elegance. The integration of image sensing, memory, and processing functions into the device, along with real-time processing of analog brightness signals, is crucial for practical artificial vision systems. High integration, flexibility, and ultra-sensitivity are essential for emulating biological processing in artificial vision systems.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Yulan Zhou, Jia Zhao, Xun Li
Summary: A novel photodetector with enhanced sensitivity through grating assistance has been proposed in this study, achieving high sensitivity at high speeds. For systems with data rates exceeding 40 Gbps, the performance of this photodetector is superior to traditional semiconductor optical amplifiers and avalanche photodiodes.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Chemical
Leonid Mochalov, Alexander Logunov, Igor Prokhorov, Tatyana Sazanova, Aleksey Kudrin, Pavel Yunin, Sergey Zelentsov, Aleksey Letnianchik, Nikolay Starostin, Glenn Boreman, Vladimir Vorotyntsev
Summary: Lead sulfide (PbS) thin films with different morphologies were synthesized through direct interaction of lead and sulfur vapors using low temperature nonequilibrium RF plasma discharge. In-situ Optical Emission Spectroscopy was used to investigate the reactive species in the plasma discharge and the mechanism of plasma-chemical reactions. The chemical composition, structure, and surface morphology of the deposited materials were characterized using SEM, XRD, and AFM, while the optical properties and electrophysical parameters of the samples were also studied.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Anish Mondal, Kapil Debnath
Summary: This study presents the design of an on-chip reconstructive spectrometer using a spectrally selective silicon photodetector array, and demonstrates the spectral reconstruction with higher resolution using neural networks.
IEEE SENSORS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Xingyue Zhangyang, Lei Liu, Zhisheng Lv, Feifei Lu, Jian Tian
Summary: A theoretical model for the photoemission of field-assisted AlGaN heterojunction nanorod array photocathodes has been established, which improves electron collection efficiency by up to 42.3%. The model discussed in this article can provide theoretical references for the design and manufacture of high-efficiency solar-blind ultraviolet detectors.
Article
Chemistry, Multidisciplinary
Subhavna Juneja, Jaspal Singh, Roshni Thapa, R. K. Soni, Jaydeep Bhattacharya
Summary: The text discusses the trend of sustainable development driving modern technology, emphasizing the importance of adopting greener fabrication processes in the manufacturing sector. A bi-functional hybrid system was synthesized using a biosynthetic reduction strategy, showing strong surface-enhanced Raman scattering characteristics.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Physics, Multidisciplinary
F. Javier Garcia de Abajo, Eduardo J. C. Dias, Valerio Di Giulio
Summary: This study reveals the nonlinear and recoil effects in the interaction between individual low-energy electrons and samples with a discrete number of states. The research highlights the potential of free electrons to control localized excitations and delineates the boundaries of such control.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Po-Hsuan Hsiao, Zi-Xi Gao, Joon-Ching Juan, Yu -Pin Lin, Sung -Yu Chen, Chia- Yun Chen
Summary: Efficient ultraviolet photodetectors are developed by incorporating colloid carbon nanodot (CCND) layers with silicon substrates. The control over CCND thickness is found to improve the photosensing characteristics by investigating the morphologies, microstructure, light absorption, and carrier dynamics. The study shows that 35-nm thick CCNDs coupled with Si exhibit remarkable sensing responsivity of 15.9 A/W and detectivity of 2.94 x 10^14 Jones under 352 nm wavelength detecting lights. The underlying mechanism is attributed to the synergistic contributions from reduced dynamic dark currents and efficient charge separation from CCND/Si heterojunction.
Article
Chemistry, Multidisciplinary
Tao Wang, Daming Zheng, Jike Zhang, Jie Qiao, Changjun Min, Xiaocong Yuan, Michael Somekh, Fu Feng
Summary: In this study, a high-performance flexible photodetector based on formamidinium-based perovskites was developed by optimizing the film quality and device engineering, showing fast response and excellent air-stability. By introducing additives and embedding Au nanostructures, the performance of the device was further enhanced. This research provides a new possibility for high-performance photodetectors in optical communication applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Meng Zhang, Jinxuan Wu, Haotao Lin, Xianjun Zhang, Jian-Long Xu, Yan Yan, Sui-Dong Wang, Man Wong, Hoi-Sing Kwok
Summary: This letter discusses the design of bipolar phototransistors based on wide bandgap organic-inorganic semiconductor bilayer structure for broadband optical detection. By carefully selecting materials and matching energy levels, the phototransistors can detect light from ultraviolet to near-infrared. Through field effect regulation, dark current is suppressed and the phototransistors exhibit high normalized detectivity.
IEEE ELECTRON DEVICE LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Zihan Yan, Hao Yang, Zhuo Yang, Chengao Ji, Guangyu Zhang, Yusong Tu, Guangyu Du, Songhua Cai, Shenghuang Lin
Summary: Tellurene and tellurides, as stylish 2D functional materials, have attracted great interest due to their excellent physical and chemical properties. Photodetectors based on tellurene and telluride have shown flexibility, high frequency response, and high signal-to-noise ratio, making them at the forefront of photodetector research.
Article
Chemistry, Multidisciplinary
Yi-Sheng Lu, Sanahan Vijayakumar, Arnaud Chaix, Brian R. Pimentel, Kyle C. Bentz, Sheng Li, Adriano Chan, Charlotte Wahl, James S. Ha, Deborah E. Hunka, Gerry R. Boss, Seth M. Cohen, Michael J. Sailor
Summary: A one-dimensional photonic crystal made from porous silicon impregnated with chemically specific colorimetric indicator dyes can selectively detect hydrogen fluoride, hydrogen cyanide, and the nerve agent diisopropyl fluorophosphate. The method allows for remote analyte detection by measuring the intensity ratio of two stop bands in the reflectance spectrum, demonstrating high sensitivity and specificity.
Article
Pharmacology & Pharmacy
Gerburg K. Schwaerzer, Darren E. Casteel, Federico Cividini, Hema Kalyanaraman, Shunhui Zhuang, Yusu Gu, Nancy D. Dalton, Kirk L. Peterson, Wolfgang H. Dillmann, Gerry R. Boss, Renate B. Pilz
Summary: Experimental results suggest that long-term activation of PKG1 in the heart may be harmful, especially in the presence of pressure overload and neurohumoral stress.
BRITISH JOURNAL OF PHARMACOLOGY
(2022)
Article
Toxicology
Adriano Chan, Jangwoen Lee, Subrata Bhadra, Nesta Bortey-Sam, Tara B. Hendry-Hofer, Vikhyat S. Bebarta, Sari B. Mahon, Matthew Brenner, Brian Logue, Renate B. Pilz, Gerry R. Boss
Summary: The study shows that sodium tetrathionate can effectively detoxify hydrogen cyanide and has the potential to be an effective antidote against cyanide and methanethiol poisoning.
CLINICAL TOXICOLOGY
(2022)
Article
Optics
Sungchul Kim, Evgenii Kim, Eloise Anguluan, Jae Gwan Kim
Summary: Laser speckle imaging is a common technique for monitoring blood flow. Using sample entropy analysis instead of standard deviation calculations can improve the accuracy of measuring blood flow and reduce the impact of motion artifacts.
CHINESE OPTICS LETTERS
(2022)
Article
Toxicology
George P. Philipopoulos, John Tat, Adriano Chan, Jingjing Jiang, David Mukai, Tanya Burney, Melody Doosty, Sari Mahon, Hemal H. Patel, Carl W. White, Matthew Brenner, Jangwoen Lee, Gerry R. Boss
Summary: Cobinamide has been found to bind to methyl mercaptan (CH3SH) and improve cell growth after exposure to CH3SH. CH3SH reduces cellular oxygen consumption and ATP content and activates the stress protein JNK, while cobinamide reverses these changes. It has been shown to be an effective antidote for CH3SH poisoning in both mice and rabbits.
CLINICAL TOXICOLOGY
(2022)
Article
Chemistry, Analytical
Manal Mohamed, Eunjung Jo, Nourelhuda Mohamed, Minhee Kim, Jeong-Dae Yun, Jae Gwan Kim
Summary: The study developed a fully integrated EEG/fNIRS brain monitoring system with low cost, lightweight, and low power consumption capabilities. The system can simultaneously acquire EEG and fNIRS signals and has been successfully tested to verify its performance in acquiring brain signals effectively.
Article
Clinical Neurology
Jaewon Kim, Dong Keon Yon, Kyu Yeong Choi, Jang Jae Lee, Namwoo Kim, Kun Ho Lee, Jae Gwan Kim
Summary: The study suggests that olfactory-stimulated fNIRS could be a potential diagnostic tool for early detection of mild cognitive impairment (MCI) and/or Alzheimer's disease (AD).
ALZHEIMERS RESEARCH & THERAPY
(2022)
Article
Geriatrics & Gerontology
Thi Kieu Khanh Ho, Minhee Kim, Younghun Jeon, Byeong C. Kim, Jae Gwan Kim, Kun Ho Lee, Jong-In Song, Jeonghwan Gwak
Summary: This study validates the capability of functional near-infrared spectroscopy (fNIRS) coupled with Deep Learning (DL) models for multi-class classification of Alzheimer's disease (AD). Through comprehensive experimental design and examination of hemodynamic responses in the prefrontal cortex, significant differences were found between subject groups during memory and verbal tasks, as well as in relation to AD severity and gender. Additionally, DL models demonstrated better classification performance compared to conventional machine learning algorithms. These findings highlight the potential of fNIRS-based approaches and DL frameworks in the development of AD diagnosis systems.
FRONTIERS IN AGING NEUROSCIENCE
(2022)
Article
Computer Science, Interdisciplinary Applications
Myeongsu Seong, Yoonho Oh, Kijoon Lee, Jae G. Kim
Summary: This study proposes alternative approaches to obtain blood flow information via Diffuse Correlation Spectroscopy (DCS) by numerically integrating temporal autocorrelation curves. The feasibility of the suggested methods is validated through simulation, liquid phantom, and in vivo experiments. The study also demonstrates the possibility of miniaturizing DCS systems using microcontrollers for signal processing.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Integrative & Complementary Medicine
Yu-Mi Lee, Dong-Hee Choi, Min-Woo Cheon, Jae Gwan Kim, Jeong-Sang Kim, Myung-Geun Shin, Hye-Ran Kim, Daehwan Youn
Summary: This study investigated the effect of acupuncture at LR3 on the expression of mitochondria-related genes in a model of acute liver failure (ALF). The results showed that manual acupuncture could induce the expression of metabolic and inflammation-related genes, and regulate the production of proinflammatory factors in hepatic mitochondria, thereby reducing the risk of D-GalN-induced ALF.
EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE
(2022)
Article
Chemistry, Analytical
Myeongsu Seong, Yoonho Oh, Hyung Joon Park, Won-Seok Choi, Jae Gwan Kim
Summary: This study used hemodynamic signals to differentiate Alzheimer's disease (AD) and wild-type (WT) mice, identifying statistically significant differences in certain features and achieving an accuracy of 84.3% with machine learning techniques. The suggested approach has the potential to be an alternative method for the differentiation of AD and WT.
Article
Chemistry, Analytical
Nourelhuda Mohamed, Hyun-Seok Kim, Manal Mohamed, Kyu-Min Kang, Sung-Hoon Kim, Jae Gwan Kim
Summary: Meticulous monitoring of the cardiovascular system is crucial for postoperative patients in postanesthesia or intensive care units. This study presents a novel bedside monitoring system that utilizes a lightweight and wearable patch sensor to continuously monitor the cardiovascular system.
Article
Dermatology
Soo Hyeon Bae, Jun Hyeong Park, Soo-Hyun Kim, Sook Jung Yun, Jae Gwan Kim, Jee-Bum Lee
Summary: This study evaluated the influence of LEDs at specific wavelengths on melatonin membrane receptor (MT1) and cutaneous photorejuvenation via the MT1 pathway. It was found that LED irradiation induces collagen synthesis and MMP-1 inhibition in HDFs via MT1 activation.
ANNALS OF DERMATOLOGY
(2022)
Article
Optics
Dong-Hyuk Choi, Sungchul Kim, Teo Jeon Shin, Seonghyun Kim, Jae Gwan Kim
Summary: Our study shows that near-infrared spectroscopy (NIRS) signals have potential as a new depth of anesthesia (DOA) index in clinical practice. By measuring NIRS signals in a minimally invasive model, we have demonstrated that the quality of these signals is comparable to those obtained directly from the brain. These findings are significant for clinical applications.
CURRENT OPTICS AND PHOTONICS
(2022)
Article
Surgery
Yoonho Oh, Nam Nguyen, Hyun Jin Jung, Youngshik Choe, Jae Gwan Kim
Summary: This study investigated the effects of 810 nm light-emitting diode (LED) photobiomodulation (PBM) on cerebral metabolism and cerebral hemodynamic using a broadband near-infrared spectroscopy (bb-NIRS) under anesthesia conditions. The results showed that PBM increased cerebral oxygenation and blood volume as expected, but oxidized cytochrome c oxidase (CCO) concentration decreased, which contradicted previous studies.
PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY
(2022)
