Results 91 to 100 of about 47,152 (263)

Transient Terahertz Oscillations During Photoinduced Polarization Topology Reconfiguration in Ferroelectric Superlattices

Advanced Science, EarlyView.
Terahertz resonances in crystalline heterostructures could close a spectral gap between conventional electronics and photonics while opening new windows on non‐equilibrium lattice dynamics. Femtosecond optical screening of the depolarization field in epitaxial PbTiO3/SrTiO3 superlattices launches a collective polar mode that oscillates near 1 THz and ...
Deepankar Sri Gyan, Hyeon Jun Lee, Xiangwei Guo, Youngjun Ahn, Samuel D. Marks, Mohammed H. Yusuf, Matthew Dawber, James M. Glownia, Diling Zhu, Takahiro Sato, Sanghoon Song, Haidan Wen, Jia‐Mian Hu, Paul G. Evans   +13 more
wiley   +1 more source

High‐resolution 3D imaging by microwave photonic time division multiplexing‐multiple‐input‐multiple‐output radar with broadband digital beamforming

IET Radar, Sonar & Navigation
A broadband microwave photonic time division multiplexing (TDM) multiple‐input‐multiple‐output (MIMO) radar is proposed in which photonic frequency quadrupling is adopted to generate broadband radar signals and photonic frequency mixing is implemented ...
Yuewen Zhou, Fangzheng Zhang, Jiayuan Kong, Shilong Pan   +3 more
doaj   +1 more source

Continuous Rapid⁃Beam⁃Scanning and Circular⁃Polarized Leaky⁃Wave Antenna Based on Meandering⁃SIW with Defected Ground Structures

Transactions of Nanjing University of Aeronautics and Astronautics
A compact high-scanning-rate circular-polarized leaky-wave antenna （LWA） based on a meandering substrate integrated waveguide （SIW） with defected ground structures （DGSs） is presented.
RUAN Yizheng, NIU Zhenyi, CHEN Weikang, ZHAO Yongjiu, PAN Shilong   +4 more
doaj   +1 more source

Concept for Continuously Tunable Output Filters for Digital Transmitter Architectures

IEEE Access, 2019
This paper presents a novel output filter approach for continuously frequency-tunable digital power amplifiers, suitable for future seamless and band-less applications in 5G, e.g. for cognitive radios (CR). The presented tunable output filter is based on
Christian Schuster, Lukas Schynol, Andreas Wentzel, Florian Huhn, Ersin Polat, Sonke Schmidt, Rolf Jakoby, Wolfgang Heinrich, Holger Maune   +8 more
doaj   +1 more source

Low-loss microwave photonics links using hollow core fibres. [PDF]

Light Sci Appl, 2022
Zhang X, Feng Z, Marpaung D, Fokoua EN, Sakr H, Hayes JR, Poletti F, Richardson DJ, Slavík R.   +8 more
europepmc   +1 more source

Multimodal Super‐Resolution Imaging of Nitrogen‐Vacancy Centers via High‐Index‐Induced Structured Illumination Microscopy and Optically Detected Magnetic Resonance Spectrometry

Advanced Science, EarlyView.
This work demonstrates a multimodal super‐resolution imaging technique for nitrogen‐vacancy centers by integrating high‐index‐induced structured illumination with optically detected magnetic resonance. By utilizing diamond's high refractive index, the method achieves sub‐100‐nm spatial resolution and enhanced localization. This dual‐modulation strategy
Kyu Ri Choi, Mohammed Zia Jalaludeen, Samuel Begumya, Yan Qiu Du, Dong Hee Park, Bin Chan Joo, Jae Hwan Yoo, Síle Nic Chormaic, Shilong Li, Yeon Ui Lee   +9 more
wiley   +1 more source

A New Method of Robust Ground Moving Target Detection Under Different Backgrounds of Airborne SAR Based on Spatial Deformable Module

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Combined with the synthetic aperture radar (SAR) imaging algorithm, diverse simulation sample sets of ground moving targets are constructed to tackle the problem of insufficient measured data in the SAR ground moving target indication algorithm based on ...
He Yan, Hui Liu, Jialin Hao, Wenshuo Xu, Jingdong Zhang, Di Wu, Xudong Wang, Gong Zhang, Daiyin Zhu   +8 more
doaj   +1 more source

Microwave and Terahertz Generation Based on Photonically Assisted Microwave Frequency Twelvetupling With Large Tunability

IEEE Photonics Journal, 2010
A novel approach to achieving photonically assisted microwave frequency twelvetupling with large frequency tunability is proposed and demonstrated. The frequency twelvetupling is realized through a joint operation of polarization modulation, four-wave ...
Wangzhe Li, Jianping Yao
doaj   +1 more source

Distributed Acoustic Sensing Based on Coherent Microwave Photonics Interferometry. [PDF]

Sensors (Basel), 2021
Hua L, Zhu X, Cheng B, Song Y, Zhang Q, Wu Y, Murdoch LC, Dauson ER, Donahue CM, Xiao H.   +9 more
europepmc   +1 more source

Advances and Perspectives in Graphene‐Based Quantum Dots Enabled Neuromorphic Devices

Advanced Science, EarlyView.
Graphene‐based QDs are zero‐dimensional carbon nanomaterials with pronounced quantum confinement and tunable electronic structures. Herein, we summarize their synthesis strategies and functionalization methods, and highlight their functional roles and operating mechanisms in devices, as well as recent advances in neuromorphic electronics. We anticipate
Yulin Zhen, Wei Zeng, Zherui Zhao, JiYu Zhao, Ziyan Huang, Zhuo Chen, Kui Zhou, Guanglong Ding, Su‐Ting Han, Ye Zhou   +9 more
wiley   +1 more source