Results 51 to 60 of about 91,837 (247)
Advanced Functional Materials, EarlyView.Printed negative‐dielectric‐anisotropy liquid‐crystal droplets enable multidimensional full‐vectorial optical‐field sensing across polarization, phase, and wavelength, while also generating tunable skyrmionic‐like complex optical fields. ABSTRACT Adaptive manipulation of vectorial optical fields is important for optical metrology, imaging, and ...
Jinge Guo +14 more
wiley +1 more source
Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT
IEEE Access, 2019 In the low earth orbit (LEO) satellite Internet of Things (IoT), the IoT devices can be distributed in remote areas (e.g., desert, ocean, and forest) for some special applications, where they are unable to have direct terrestrial network accesses and can
Chao Yang +3 more
doaj +1 more source
Slanted-eye featured forbidden bands in a water channel with undulated sidewalls
Results in Physics, 2021 Resonances induced by structure periodicity can always lead to frequency gaps, which are forbidden bands of propagating waves. Besides the traditional Bragg gaps, non-Bragg gaps have been found in periodic waveguides for years, which have been proved to ...
Bo-Yang Ma +4 more
doaj +1 more source
Molecularly Dissipative Liquid Crystal Elastomer Foams for Impact and Vibration Attenuation
Advanced Functional Materials, EarlyView.Liquid crystal elastomer foams integrate cellular deformation with mesogen reorientation to create a dual‐scale energy dissipation mechanism. Progressive pore collapse absorbs mechanical loads, while stress‐induced mesogen reorientation provides additional damping, resulting in reduced impact transmission and broadband suppression of vibrational ...
Subi Choi +5 more
wiley +1 more source
Manipulation of double acoustic defect states based on connection phase mismatching
Results in Physics, 2021 Defects in periodic structures always lead to the defect states, which can modulate the physical or chemical properties of materials to realize devices with very high performance.
Huan Liu +4 more
doaj +1 more source
Spatial and Temporal Variation of Wideband Indoor Channels [PDF]
, 2010 Extensive studies of the impact of temporal variations induced by people on the characteristics of indoor wideband channels are reported. Singular Value Decomposition Prony algorithm has been used to compute the impulse response from measured channel ...
Gremont, Boris +5 more
core +1 more source
Advanced Functional Materials, EarlyView.This study reports a self‐powered InGaAs nanowire photodetector achieving single‐photon‐level sensitivity in the shortwave infrared at non‐cryogenic temperatures. The device demonstrates high‐speed imaging capabilities even under extremely low‐flux conditions.
Kosala Dhanawansha +10 more
wiley +1 more source
Design of Multiband Balanced Folded Dipole Antenna Based on a Dual-Arm Structure for Mobile Handsets [PDF]
, 2008 YesIn this paper, a balanced antenna for mobile handset applications with enhanced bandwidth performance, that covers four bands (GSM1800, GSM1900, UMTS and 2.4-GHz WLAN), is investigated.
See, Chan H. +3 more
core +3 more sources
Temperature tuning of defect state induced by the periodic cavities between the phononic crystals
AIP Advances, 2021 The defect state in periodic structures usually leads to a pass band in the forbidden bandgap and energy localization at the position of geometric change.
Huan Liu +5 more
doaj +1 more source
Multidimensional‐Encoded High‐Fidelity Spectrometers With a Floating‐Base Bipolar Junction
Advanced Functional Materials, EarlyView.A floating‐base bipolar junction photodetector enables multidimensional spectral encoding through synergistic gate‐ and drain‐bias modulation of interfacial barrier matching. The resulting complementary spectral responses form a diverse, weakly correlated response matrix, enabling robust and high‐fidelity spectral reconstruction even at sub‐nanoampere ...
Sang‐Hyeon Lee +11 more
wiley +1 more source