Results 91 to 100 of about 11,088,671 (294)

Co-Design of BW-Enhanced Dual-Path Driver and Segmented Microring Modulator for Energy Efficient Si-Photonic Transmitters

Micromachines
Artificial intelligence computing systems increasingly demand high-bandwidth, high-extinction-ratio, chip-to-chip optical transceivers. Silicon microring modulators (MRMs) are attractive for such transmitters due to their compact footprint and wavelength-
Yingjie Ma, Bolun Cui, Guike Li, Jian Liu, Nanjian Wu, Nan Qi, Liyuan Liu   +6 more
doaj   +1 more source

Power Efficiency Evaluation of Mapping Multiplexing Technique and Pulse Amplitude Modulation for Noncoherent Systems

IEEE Photonics Journal, 2015
The two-, three-, and four-channel mapping multiplexing technique (MMT) is demonstrated to increase the data capacity of multilevel intensity-modulated transmission formats to 2, 3, and 4 bits/symbol with a substantial reduction in power penalty.
M. A. Elsherif, A. Malekmohammadi
doaj   +1 more source

Scalable and data format agnostic optical packet switch sub-systems for optical packet switched networks

, 2010
We investigate photonic packet switches that allow scaling to a large number of input and output ports. The suggested switch architectures are based on technology that has already been demonstrated. We focus on a simple Spanke node architecture. Scalable,
H. de Waardt, Yang, H., W. Wang, T. Ditewig, F. Gomez, O. Raz, Raz, O., Gomez Agis, F., H.J.S Dorren, H. Yang, Waardt, de, H., Wang, W., Ditewig, A.M.H., Calabretta, N., Dorren, H.J.S., N. Calabretta   +15 more
core   +1 more source

Polar Wurtzite NbAlN: A Transition‐Metal Nitride Alloy for Polarization‐Engineered GaN Heterostructures

Advanced Materials, EarlyView.
A novel polar wurtzite alloy, NbAlN, is demonstrated as a transition‐metal‐containing polar barrier for GaN heterostructures. Nb atoms form coherent nanoscale enrichment within the wurtzite lattice without disrupting metal polarity. This study demonstrates that transition metals can be integrated into polar nitrides to enable polarization‐related ...
Atsushi Kobayashi, Souta Kurogi, Tomoya Okuda, Riku Kikuchi, Yusuke Wakamoto, Kouei Kubota, Hikaru Sasaki, Kazuhisa Ikeda, Kanako Shojiki, Takahiro Kawamura, Toru Akiyama, Takehito Seki, Takuya Maeda   +12 more
wiley   +1 more source

Laser-Enabled Electro-Optical Encryption For Secure Photonic Systems [PDF]

International Journal of Telecommunications
Data-intensive applications are increasing rapidly and require secure, high-capacity communication technologies. Optical wireless communications based on lasers are a promising field for their high bandwidth, directionality and immunity to ...
Mahmoud Abd El Monem, Ahmed I.saleh, Mohamed Abdelsalam, Amir Almslmany   +3 more
doaj   +1 more source

Decoding Synergistic Pathways in Bimetallic MOFs for Advanced Oxidation Processes

Advanced Materials, EarlyView.
This review presents a unified framework linking metal pairing and framework design with electronic structure, redox cycling, oxidant activation, reactive‐species generation, and catalytic performance across photocatalytic and oxidant‐based BMOF‐AOPs. The resulting design principles guide the development of hydrolytically stable and efficient BMOFs for
Karim El‐Naggar, Huayang Zhang, Shaobin Wang   +2 more
wiley   +1 more source

Photonic Systems and Devices for Linear Cell Radar

Applied Sciences, 2019
This paper reviews linear cell radar systems, which are radar systems consisting of many antenna units connected by radio-over-fiber to monitor linear-shaped areas. A linear cell system using a millimeter-wave band can provide high-resolution imaging for
Tetsuya Kawanishi, Atsushi Kanno, Pham Tien Dat, Toshimasa Umezawa, Naokatsu Yamamoto   +4 more
doaj   +1 more source

Fast Hydrogel Micro‐Actuators Driven by Electric Fields

Advanced Materials, EarlyView.
We report the fabrication of chemically programmable electroactuating microstructures through the first integration of two‐photon polymerization with electrically actuated gelatin methacrylate‐based hydrogels. By tailoring the charge of the polymer network, we demonstrate programmable polarity‐dependent bending, enabling microstructures that ...
Annaël Sort‐Montenegro, Jason M. Delente, Žiga Roblek, Yekaterina Tskhe, Luke Dowling, Colm Delaney, Larisa Florea   +6 more
wiley   +1 more source

Dual‐State Programmable Oxide Transistor for Time‐Based Cryptography

Advanced Materials, EarlyView.
A DUPOT enables independently tunable Vth and Isat depending on gate bias polarity, producing three‐dimensional dynamical behavior within a transfer characteristic. This behavior originates from charge trapping and oxygen‐ion migration in the HfO2 layer.
Huisu Noh, Min Gu Lee, Hwayoung Kim, Myeongchan Ko, Jungwan Noh, Taewook Go, Jingyao Yu, Sang‐Hee Ko Park, Himchan Cho, Kyung Min Kim   +9 more
wiley   +1 more source

Properties of Rb CPT Atomic Clock at Subharmonic Microwave Modulation Frequencies

IEEE Photonics Journal, 2019
This letter presents for the first time a systematic study of an atomic frequency standard based on сoherent population trapping (CPT) effect in 87Rb vapour optically pumped with a multifrequency laser radiation formed with sidebands of a single ...
Daba Radnatarov, Sergey Kobtsev, Valerii Andryushkov, Sergey Khripunov, Evgenii Baklanov, Arkadii Yakovlev   +5 more
doaj   +1 more source