Results 81 to 90 of about 2,542,170 (251)

Generation and Enhancement of Persistent Nanoscale Magnetization in All‐Dielectric Metasurfaces by Optically Injected and Localized Free Carriers

Advanced Science, EarlyView.
Infrared metasurface‐guided waves (IR‐MGW) scattered by a time interface (TI) induced by rapid, localized free‐carrier generation can be efficiently rectified to generate strong, persistent magnetic fields. We develop a rigorous, theoretical model to study a time‐varying, dispersive medium and uncover the redistribution of the initial energy of the IR ...
Shivaksh Rawat, Samyobrata Mukherjee, Gennady Shvets   +2 more
wiley   +1 more source

Error mitigated metasurface-based randomized measurement schemes

Physical Review Research
Estimating properties of quantum states via randomized measurements has become a significant part of quantum information science. In this paper, we design an innovative approach leveraging metasurfaces to perform randomized measurements on photonic ...
Hang Ren, Yipei Zhang, Ze Zheng, Cuifeng Ying, Lei Xu, Mohsen Rahmani, K. Birgitta Whaley   +6 more
doaj   +1 more source

All-dielectric metasurfaces for polarization manipulation: principles and emerging applications

Nanophotonics, 2020
Metasurfaces, composed of specifically designed subwavelength units in a two-dimensional plane, offer a new paradigm to design ultracompact optical elements that show great potentials for miniaturizing optical systems.
Hu Yueqiang, Wang Xudong, Luo Xuhao, Ou Xiangnian, Li Ling, Chen Yiqin, Ping Yang, Wang Shuai, Duan Huigao   +8 more
doaj   +1 more source

Space‐Time Metasurface Antenna Enabled High‐Dimensional Electromagnetic Modulation for Intrinsic Physical Layer Security

Advanced Science, EarlyView.
The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang, Yiqing Sun, Chenfeng Yang, Siran Wang, Zheng Xing Wang, Kaixu Wang, Geng‐Bo Wu   +6 more
wiley   +1 more source

Highly-nonlinear quantum-engineered polaritonic metasurfaces

, 2015
Intersubband transitions in n-doped semiconductor heterostructures allow one to quantum-engineer one of the largest known nonlinear response in condensed matter systems but only for the electric field polarized normal to semiconductor layer.
Alu, Andrea, Tymchenko, Mikhailo, Gomez-Diaz, J. Sebastian, Lee, Jongwon, Nookala, Nishant, Boehm, Gerhard, Amann, Marcus-Christian, Belkin, Mikhail A., Demmerle, Frederic   +8 more
core   +1 more source

Hierarchical Physical‐Cyber Encryption via Metasurface‐Encoded Holographic Keys

Advanced Science, EarlyView.
ABSTRACT Physical‐layer encryption based on metasurfaces has emerged as a promising alternative to conventional algorithmic cryptography by embedding security into physical processes. However, most existing metasurface‐based encryption schemes operate within single‐stage or static frameworks, where correct physical illumination directly reveals the ...
Zhen Liu, Changhong Dai, Wei Zhu, Ruisheng Yang, Bohan Zhang, Lei Zhang, Bobo Du, Shengxiang Wang, Guangwei Hu   +8 more
wiley   +1 more source

Quantum Imaging with Metasurfaces: Gains, Limitations, and Prospects

Quantum imaging leverages entanglement and photon correlations to surpass classical limits in resolution and noise performance. However, its practical deployment is constrained by bulky optical setups and limited system adaptability.
Yuxuan Shang, Weitao Liu, Zhisheng Zhang
core   +1 more source

Deep-learning design of electronic metasurfaces in graphene for quantum control and Dirac electron holography [PDF]

APL Machine Learning
Metasurfaces are sub-wavelength patterned layers for controlling waves in physical systems. In optics, metasurfaces are created by materials with different dielectric constants and are capable of unconventional functionalities. We develop a deep-learning
Chen-Di Han, Li-Li Ye, Zin K. Lin, Vassilios Kovanis, Ying-Cheng Lai   +4 more
semanticscholar   +1 more source

Giant Magnetic Purcell Effect Induced by High‐Order Mie Resonances

Advanced Science, EarlyView.
High‐order Mie resonances in dielectric spheres selectively amplify magnetic dipole emission from Eu3+ emitters, producing a giant magnetic Purcell effect. Localized emitters can efficiently access high‐order resonant modes, and the low‐loss TiO2 platform enables direct far‐field observation of the enhanced emission.
Haonan Shi, Ningning Song, Anjun Huang, Zhengwen Yang, Jingbo Sun, Yongzheng Wen, Ji Zhou   +6 more
wiley   +1 more source

Metasurface-assisted multimodal quantum imaging

Proceedings of the National Academy of Sciences
Traditional quantum imaging is featured by remarkable sensitivity and signal-to-noise ratio, but limited by bulkiness and static function (either phase contrast imaging or edge detection). Our report synergizes a polarization-entangled source with a metasurface consisting of various sophisticatedly engineered spatial frequency segments.
Yifan Zhou, Xiaoshu Zhu, Tianyue Li, Zhou Zhou, Qianhui Bi, Jun Liu, Jian Chen, Boyan Fu, Juanzi He, Xiaojing Feng, Xinyang Feng, Xingyu Liu, Qianjin Wang, Shuming Wang, Zhenlin Wang, Cheng-Wei Qiu, Shining Zhu   +16 more
openaire   +2 more sources