Results 51 to 60 of about 43,359 (276)
Investigation of a low frequency coherent mode in Wendelstein 7-X with island divertor
Nuclear Fusion, 2023 During the island divertor operation of W7-X, especially in standard magnetic configuration (with 5/5 island chain in the scrape-off-layer (SOL)), quasi-periodic electromagnetic oscillation is observed.
H.M. Xiang +22 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker +6 more
wiley +1 more source
Acoustic frequency atomic spin oscillator in the quantum regime
Nature Communications, 2023 Quantum noise reduction and entanglement-enhanced sensing in the acoustic frequency range is an outstanding challenge relevant for a number of applications including magnetometry and broadband noise reduction in gravitational wave detectors.
Jun Jia +5 more
doaj +1 more source
Silicon-Chip Mid-Infrared Frequency Comb Generation
, 2014 Optical frequency combs represent a revolutionary technology for high precision spectroscopy due to their narrow linewidths and precise frequency spacing.
Cardenas, Jaime +11 more
core +1 more source
Broadband varactor-tuned GaAs f.e.t. oscillator
Electronics Letters, 1980 A broadband varactor-tuned GaAs f.e.t. oscillator (7.4 to 13.1 GHz) is presented, together with measured and predicted performance characteristics. The circuit uses tuning in series with both the gate and the source leads of the device to maintain optimum oscillation conditions across the band.
openaire +1 more source
Fully efficient adiabatic frequency conversion of broadband Ti:sapphire oscillator pulses [PDF]
Optics Letters, 2012 By adiabatic difference-frequency generation in an aperiodically poled nonlinear crystal-a nonlinear optical analog of rapid adiabatic passage in a two-level atomic system-we demonstrate the conversion of a 110 nm band from an octave-spanning Ti:sapphire oscillator to the infrared, spanning 1550 to 2450 nm, with near-100% internal conversion efficiency.
Moses, Jeffrey +2 more
openaire +4 more sources
Microsphere Autolithography—A Scalable Approach for Arbitrary Patterning of Dielectric Spheres
Advanced Functional Materials, EarlyView.MicroSphere Autolithography (µSAL) enables scalable fabrication of patchy particles with customizable surface motifs. Focusing light through dielectric microspheres creates well defined, tunable patches via a conformal poly(dopamine) photoresist. Nearly arbitrary surface patterns can be achieved, with the resolution set by the index contrast between ...
Elliott D. Kunkel +3 more
wiley +1 more source
Earth and Planetary Physics, 2019 Observations of a quasi-90-day oscillation in the mesosphere and lower thermosphere (MLT) region from April 2011 to December 2014 are presented in this study. There is clear evidence of a quasi-90-day oscillation in temperatures obtained from the Kunming
Wen Yi +4 more
doaj +1 more source
Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces
Advanced Functional Materials, EarlyView.A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai +6 more
wiley +1 more source
EnergiesDue to the increasing integration of new energy sources, the power system now exhibits low inertia, in which the broadband oscillation problem is increasingly significant in the face of the strong coupling of complex and variable power systems, and the ...
Jinggeng Gao +5 more
doaj +1 more source