Results 31 to 40 of about 79,565 (217)

Dynamics of passing-stars-perturbed binary star systems [PDF]

, 2019
In this work, we investigate the dynamical effects of a sequence of close encounters over 200 Myr varying in the interval of 10000 -- 100000 au between a binary star system and passing stars with masses ranging from 0.1$M_{\odot}$ to 10$M_{\odot}$.
Bancelin, David, Loibnegger, Birgit, Nordlander, Thomas, Pilat-Lohinger, Elke   +3 more
core   +2 more sources

Chiral Metasurfaces with Multidimensional Tunability for Optical Chiral States

Advanced Optical Materials, EarlyView.
A novel bilayer perovskite chiral metasurface enables tunable transitions between BIC‐associated vortex centres and circularly polarized states via rotational symmetry control. Breaking rotational symmetry and applying in situ rotation to the upper layer allows precise, omnidirectional tuning of C points in momentum space. This evolution forms a Möbius‐
Dayang Lin, Abbas Ghaffari, Qing Gu
wiley   +1 more source

Observation of Localized Resonant Phonon Polaritons in Biaxial α‐MoO3 Nanoparticles

Advanced Science, EarlyView.
Biaxial α‐MoO3 nanoparticles exhibit tunable, high‐Q mid‐infrared resonances driven by localized phonon polaritons. Combining a novel synthesis method, hyperspectral near‐field imaging and a unified theoretical analysis, this work reveals eigenmodes and resonance conditions in biaxial particles.
Daniel Beitner, Asaf Farhi, Ravindra Kumar Nitharwal, Tejendra Dixit, Tzvia Beitner, Shachar Richter, SivaRama Krishnan, Haim Suchowski   +7 more
wiley   +1 more source

Helioseismology and Asteroseismology: Looking for Gravitational Waves in acoustic oscillations

, 2014
Current helioseismology observations allow the determination of the frequencies and surface velocity amplitudes of solar acoustic modes with exceptionally high precision. In some cases, the frequency accuracy is better than one part in a million. We show
Lopes, Ilídio, Silk, Joseph
core   +2 more sources

Chaotic dynamics of the planet in HD 196885 AB [PDF]

, 2014
Depending on the planetary orbit around the host star(s), a planet could orbit either one or both stars in a binary system as S-type or P-type, respectively. We have analysed the dynamics of the S-type planetary system in HD 196885 AB with an emphasis on
Hinse, Tobias Cornelius, Noyola, Joaquin, Quarles, Billy, Satyal, Suman   +3 more
core   +1 more source

Enhanced Spectral Tunability by Sub‐10 nm Nanogaps in Graphene‐Metal Hybrid Metasurfaces

Advanced Science, EarlyView.
A tunable mid‐infrared metasurface integrating graphene and metal antenna arrays with sub‐10 nm nanogaps is presented, overcoming the ≈20 nm limit of conventional fabrication. The enhanced spectral tuning range and modulation depth are enabled by combining electron‐beam lithography, thin metal deposition, and directional ion milling to precisely define
Fei Han, Zaoyang Lin, Kacper Pilarczyk, Hongwei Tang, Guy A. E. Vandenbosch, Joris Van de Vondel, Xuezhi Zheng, Niels Verellen, Ewald Janssens   +8 more
wiley   +1 more source

Controlling Twisted Angles in Directly Grown MoS2 Bilayers via Tilt Grain Boundary Engineering

Advanced Science, EarlyView.
In this study, the stacking configurations and the growth mechanism of twisted bilayer (TB) MoS2 are systematically investigated, revealing that the relative rotation angle between the two layers is guided by the tilt grain boundary (GBs) of the bottom layer.
Xiaotian Li, Xuan Zhao, Luneng Zhao, Junfeng Gao, Zihan Zhao, Jian Yang, Tiantian Zhang, Yibiao Feng, Zejun Luo, Nan Liu, Jiacai Nie, Wenkai Zhang, Ruifen Dou   +12 more
wiley   +1 more source

Self‐Assembled Polypseudorotaxanes Crosslinked by Dynamic Disulfide Bonds as Modular Functionalization for Thiophilic Metal Nanoparticles

Angewandte Chemie, EarlyView.
Self‐assembled thiol‐rich polypseudorotaxanes with high modularity were developed via a “one‐pot” preparation through the threading of thiolated α‐cyclodextrins on polymers and subsequent oxidation of thiols into disulfide bonds. This dynamic motif was used as a functionalization platform for thiophilic metal nanoparticles, either tethering them to a ...
Xiang Xu, Bing Zan, Yuanyang Xie, Pornpilat Akapan, Marcelo da Silva, Miao Zhao, Erol Hasan, Aliaksandra Rakovich, Driton Vllasaliu, Gregory N. Smith, Gustavo González‐Gaitano, Graeme Hogarth, Cécile A. Dreiss   +12 more
wiley   +2 more sources

Circular Polarimetric Imaging with a Metamaterial Integrated Long‐Wavelength Infrared Focal Plane Array

Advanced Science, EarlyView.
A quantum well infrared photodetector based long‐wavelength infrared division‐of‐focal‐plane‐array circular polarimeter featuring a 320 × 256 pixel array integrated with a chiral meta‐mirror structure array is established. The device achieves a circular polarization extinction ratio of 5.67, a 9.13‐fold enhancement in responsivity, a noise equivalent ...
Tianyun Zhu, Ling Wang, Wenji Jing, Jie Deng, Jiexian Ye, Yujie Zhang, Zeshi Chu, Jing Zhou, Xiaoshuang Chen, Xiangyang Li, Wei Lu, Xuechu Shen   +11 more
wiley   +1 more source

High‐Temperature Single‐Photon Emission From Covalently Functionalized van der Waals Heterostructures

Advanced Science, EarlyView.
Covalent diazonium functionalization of graphite‐WSe2 heterostructures produces high‐purity single‐photon emission from WSe2 at T = 90 K, far above the typical T = 10 K limit. The chemical modification reshapes graphite's electronic structure and couples to WSe2 midgap states, stabilizing quantum emitters at elevated temperatures and opening pathways ...
S. Carin Gavin, Hsun‐Jen Chuang, Anushka Dasgupta, Moumita Kar, Kathleen M. McCreary, Sung‐Joon Lee, M. Iqbal Bakti Utama, Chunxi Zhou, Xiangzhi Li, George C. Schatz, Tobin J. Marks, Mark C. Hersam, Berend T. Jonker, Nathaniel P. Stern   +13 more
wiley   +1 more source