Results 31 to 40 of about 4,942,780 (260)

GaN-Based Generic Bifunction LED for Potential Duplex Free-Space VLCs

IEEE Photonics Journal, 2017
A generic bifunction GaN light-emitting diode (LED) structure, which has a 300 nm n+ -ZnO epitaxial layer grown on a standard GaN LED epistack and a mesa size of $200\, \mathrm{\mu} {\rm{m\, \times \, 600\, }}\mathrm{\mu} {\rm{m ...
Lilin Liu, Xiangying Zhang, Zhenkun Sun, Bing Yan, Dongdong Teng, Gang Wang   +5 more
doaj   +1 more source

DRL-Based IRS-Assisted Secure Visible Light Communications

IEEE Photonics Journal, 2022
In this paper, we develop a novel Physical Layer Security (PLS) technique for a Visible Light Communication (VLC) system composed of light fixtures assisted by mirror array sheets serving as Intelligent Reflecting Surfaces (IRS).
Danya A. Saifaldeen, Bekir S. Ciftler, Mohamed M. Abdallah, Khalid A. Qaraqe   +3 more
doaj   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Zero power light labeling based on visible light communication

Dianxin kexue, 2023
In order to achieve zero energy consumption of visible light labels, MATLAB and MULTISIM were used to simulate the impedance matching of the receiver, matching the input impedance of the first-order equalization circuit with the internal resistance of ...
Tianyang MA, Xiongbin CHEN, Yiwu XU
doaj   +2 more sources

Off-Axis Co-Optical Path Large-Range Line Scanning Chromatic Confocal Sensor

Photonic Sensors
This article proposes a line scanning chromatic confocal sensor to solve the problem of limited chromatic confocal measurement due to the small measurement range and low measurement efficiency in the industrial inspection process.
Meizhong Liao, Yuqi Yang, Xiaolian Lu, Haiqi Li, Jun Zhang, Jinfeng Wang, Zhe Chen   +6 more
doaj   +1 more source

Information Theoretic Limits of Improved ACO-OFDM Receivers in Optical Intensity Channels With Time Dispersion

IEEE Open Journal of the Communications Society
From an information-theoretic perspective, we investigate performance of asymmetrically clipped optical OFDM (ACO-OFDM) in intensity modulated optical wireless systems.
Xiaozhen Liu, Jing Zhou, Wenyi Zhang
doaj   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

3D Visible‐Light Invisibility Cloak

Advanced Science, 2018
The concept of an invisibility cloak is a fixture of science fiction, fantasy, and the collective imagination. However, a real device that can hide an object from sight in visible light from absolutely any viewpoint would be extremely challenging to ...
Bin Zheng, Rongrong Zhu, Liqiao Jing, Yihao Yang, Lian Shen, Huaping Wang, Zuojia Wang, Xianmin Zhang, Xu Liu, Erping Li, Hongsheng Chen   +10 more
doaj   +1 more source

Experimental Comparison of PAM, CAP, and DMT Modulations in Phosphorescent White LED Transmission Link

IEEE Photonics Journal, 2015
In the paper, an experimental comparison of pulse amplitude, carrierless amplitude-phase, and discrete multitone modulations is carried in a visible light communications link employing white phosphorescent light-emitting diode (LED) as a transmitter.
G. Stepniak, L. Maksymiuk, J. Siuzdak
doaj   +1 more source

Integrated avalanche photodetectors for visible light

Nature Communications, 2021
Integrated photodetectors are essential for scalable photonic platforms, yet most efforts are concerted on the developing devices operating at infrared telecommunication wavelengths.
Salih Yanikgonul, Victor Leong, Jun Rong Ong, Ting Hu, Shawn Yohanes Siew, Ching Eng Png, Leonid Krivitsky   +6 more
doaj   +1 more source