Results 81 to 90 of about 9,186 (292)

Scalable Thermal Engineering via Femtosecond Laser‐Direct‐Written Phononic Nanostructures

Advanced Functional Materials, EarlyView.
This study demonstrates that femtosecond laser‐induced periodic surface structures (fs‐LIPSS) can function as phononic metasurfaces, reducing thermal conductivity below the plain thin‐film limit. Phonon Monte Carlo analysis reveals that the periodic structures restrict phonon mean free paths.
Hiroki Hamma, Roman Anufriev, Kazuyoshi Fushinobu, Masahiro Nomura, Byunggi Kim   +4 more
wiley   +1 more source

Optical metasurfaces for generating and manipulating optical vortex beams

Nanophotonics, 2022
Optical vortices (OVs) carrying orbital angular momentum (OAM) have attracted considerable interest in the field of optics and photonics owing to their peculiar optical features and extra degree of freedom for carrying information.
Hammad Ahmed, Hongyoon Kim, Yuebian Zhang, Y. Intaravanne, J. Jang, J. Rho, Shuqi Chen, Xianzhong Chen   +7 more
semanticscholar   +1 more source

High-efficiency generation of bi-functional holography with metasurfaces

Nanophotonics
Holography is a highly desired technology in modern photonics, yet setups for traditional generating methods suffer from complexity and bulky sizes. While metasurface-based holography exhibits advantages of compactness and easy-fabrication, most meta ...
Dai Changhong, Liu Tong, Wang Dongyi, Zhou Lei   +3 more
doaj   +1 more source

Functionality multiplexing in high-efficiency metasurfaces based on coherent wave interferences

Opto-Electronic Advances
Multiplexing multiple yet distinct functionalities in one single device is highly desired for modern integration optics, but conventional devices are usually of bulky sizes and/or low efficiencies.
Yuejiao Zhou, Tong Liu, Changhong Dai, Dongyi Wang, Lei Zhou   +4 more
doaj   +1 more source

Parametric Testing of Metasurface Stirrers for Metasurfaced Reverberation Chambers [PDF]

Sensors, 2019
In this paper, the correlation coefficients and the total scattering cross sections (TSCSs) for different types of metasurfaced stirrers and the traditional metallic stirrer, and the effects on field uniformity when such stirrers are used in reverberation chambers, are analyzed.
Hengyi Sun, Changqing Gu, Zhuo Li, Qian Xu, Mengmeng Wei, Jiajia Song, Baijie Xu, Xiaohang Dong, Kuan Wang, Ferran Martín   +9 more
openaire   +6 more sources

Switchable Thermal Mid‐IR Conducting Polymer Antenna Arrays

Advanced Functional Materials, EarlyView.
This study presents switchable mid‐infrared plasmonic resonances in PEDOT antenna arrays. Their optical extinction peaks can be reversibly switched ‘OFF’ and ‘ON’ by tuning the polaronic charge carrier concentration via the polymer's redox state, offering modulation of optical responses in the thermal mid‐infrared range including around 10 µm ...
Pravallika Bandaru, Mohammad Shaad Ansari, Suraya Kazi, Dongqing Lin, Alexander Yu Polyakov, Magnus P. Jonsson   +5 more
wiley   +1 more source

Scalable and High-Throughput Top-Down Manufacturing of Optical Metasurfaces

Sensors, 2020
Metasurfaces have shown promising potential to miniaturize existing bulk optical components thanks to their extraordinary optical properties and ultra-thin, small, and lightweight footprints.
Taejun Lee, Chihun Lee, Dong Kyo Oh, Trevon Badloe, Jong G. Ok, Junsuk Rho   +5 more
doaj   +1 more source

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Space-time-coding digital metasurfaces

Nature Communications, 2018
The recently proposed digital coding metasurfaces make it possible to control electromagnetic (EM) waves in real time, and allow the implementation of many different functionalities in a programmable way.
Lei Zhang, X. Q. Chen, Shuo Liu, Qian Zhang, Jie Zhao, J. Dai, G. Bai, X. Wan, Q. Cheng, G. Castaldi, V. Galdi, T. Cui   +11 more
semanticscholar   +1 more source

Dielectric metasurfaces for complete and independent control of the optical amplitude and phase [PDF]

Light: Science & Applications, 2019
Metasurfaces are optically thin metamaterials that promise complete control of the wavefront of light but are primarily used to control only the phase of light.
A. Overvig, S. Shrestha, Stephanie C. Malek, Ming Lu, A. Stein, Changxi Zheng, N. Yu   +6 more
semanticscholar   +1 more source