Results 101 to 110 of about 1,054,457 (281)

Semi-Leaky Modes in Chiral Optical Fibers

open access: yes, 2001
We show that a new class of guided modes can propagate in chiral optical fibers: when both core and cladding are optically active, the hybrid modes may be semi-leaky waves that continuously radiate energy into the ...
Topa, António L.   +2 more
core  

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

Fabrication Routes for Ionic Conducting Fiber Strain Sensors

open access: yesAdvanced Engineering Materials, EarlyView.
Ionic conducting fiber strain sensors (ICFSs) offer compliant, textile‐integrable sensing. Thus far, the commercialization of ICFSs has been constrained by fiber fabrication routes. This review provides a fabrication‐centric analysis of ICFSs correlating processing strategies with material properties and scalability.
Leo John Kershaw   +3 more
wiley   +1 more source

Azimuthally Varying Guided Mode Resonance Filters

open access: yesMicromachines, 2012
New and novel sensing schemes require optical functions with unconventional spatial light distributions, as well as complex spectral functionality. Micro-optical elements have shown some flexibility in their ability to spatially encode phase information ...
Eric G. Johnson   +5 more
doaj   +1 more source

Experimental and Theoretical Analysis of Rayleigh and Leaky-Sezawa Waves Propagating in ZnO/Fused Silica Substrates

open access: yesMicromachines
Piezoelectric c-axis oriented zinc oxide (ZnO) thin films, from 1.8 up to 6.6 µm thick, have been grown by the radio frequency magnetron sputtering technique onto fused silica substrates.
Cinzia Caliendo   +4 more
doaj   +1 more source

On the excitation of trapped and leaky modes in coronal slabs

open access: yes, 2005
We study the excitation of fast waves in solar coronal loops modeled as smoothed, dense plasma slabs in a uniform magnetic field. We analyse the features of the trapped and leaky modes which result from an initial disturbance generated in the loop.
R. Oliver, J. L. Ballester, J. Terradas
core   +1 more source

Materials‐Driven Additive Manufacturing for Electrical Machines: Qualification‐Oriented Design Beyond Geometric Freedom

open access: yesAdvanced Engineering Materials, EarlyView.
This perspective reframes additive manufacturing for electrical machines as a qualification‐limited materials and architecture design problem. It links process–structure–property–performance relationships to magnetic, conducting, dielectric, and thermal property windows, highlighting where AM can enable segmented magnetic circuits, permanent magnet ...
Dénes Fodor, Loránd Szabó
wiley   +1 more source

Optimal waveguide structure for low-threshold InGaN/GaN-based photonic-crystal surface-emitting lasers

open access: yesAIP Advances
We analyzed the optimal waveguide structure of two types of InGaN-based photonic crystal surface-emitting lasers (PCSELs) to suppress the coupling with leaky modes via mode simulations.
Wen-Hsuan Hsieh   +5 more
doaj   +1 more source

Dual-Polarized Array of Triangular Leaky-Wave Antennas for Compact Water Radar Instruments

open access: yesIEEE Access
This paper presents a compact dual-polarized leaky-wave antenna array for water remote sensing. The antenna employs a triangular slotted waveguide to achieve high gain and slanted pointing.
Erwan Rahault   +5 more
doaj   +1 more source

Surface and Leaky Modes in a Symmetric DPS-DNG Slab

open access: yes, 2005
Recent experimental verification of metamaterials with negative index of refraction – also known as DNG (double negative) media as their permittivity and permeability are both negative – has led to the widespread research of guiding structures that are ...
Topa, António L.   +2 more
core  

Home - About - Disclaimer - Privacy