Results 121 to 130 of about 13,719,025 (270)

Slow-light and evanescent modes at interfaces in photonic crystal waveguides: optimal extraction from experimental near-field measurements [PDF]

open access: yes, 2011
We develop a systematic approach for simultaneous extraction of the dispersion relations and profiles of multiple modes in periodic waveguides though a special global optimization procedure applied to near-field electric field measurements in the ...
Ha, S.   +23 more
core   +1 more source

Wireless battery-free body sensor networks using near-field-enabled clothing

open access: yesNature Communications, 2020
Networks of sensors placed on the skin can provide continuous measurement of human physiological signals for applications in clinical diagnostics, athletics and human-machine interfaces.
Rongzhou Lin   +8 more
semanticscholar   +1 more source

Near-field optical images of subwavelength annular aperture arrays exhibiting an extraordinary transmission [PDF]

open access: yes
In this paper, we present near-field optical images of nanostructures exhibiting an extraordinary transmission. These structures consist of annular aperture arrays engraved in a metallic film: they are quite promising structures for nanophotonics because
Santschi, C.   +6 more
core   +1 more source

Near-field photonic forces [PDF]

open access: yesPhilosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2004
A review of recent advancements in photonic forces is presented. We discuss in detail the interaction of light and sub-wavelength particles on a substrate illuminated by total internal reflection, and we study the optical forces experienced by the particles.
Nieto-Vesperinas, M.   +2 more
openaire   +4 more sources

Dielectric nanohole array metasurface for high-resolution near-field sensing and imaging

open access: yesNature Communications, 2020
Dielectric metasurfaces support resonances that are widely explored both for far-field wavefront shaping and for near-field sensing and imaging. Their design explores the interplay between localised and extended resonances, with a typical trade-off ...
D. Conteduca   +5 more
semanticscholar   +1 more source

Planar Near-Field Measurements of Low-Sidelobe Antennas [PDF]

open access: yes, 1994
The planar near-field measurement technique is a proven technology for measuring ordinary antennas operating in the microwave region. The development of very low-sidelobe antennas raises the question whether this technique can be used to accurately ...
Francis, M.H.; Newell, A.C.; Grimm, K.R.; Hoffman, J.; Schrank, H.E.
core   +1 more source

An Extended Kalman Filter for Direct, Real-Time, Phase-Based High Precision Indoor Localization

open access: yesIEEE Access, 2019
Radio-based indoor localization is currently a very vibrant scientific research field with many potential use cases. It offers high value for customers, for example, in the fields of robotics, logistics, and automation, or in context-aware IT services ...
Melanie Lipka   +2 more
doaj   +1 more source

A Near Field Localization Method for Buried Objects [PDF]

open access: yes, 2011
"In this paper a technique based on Directions of Arrival estimation is applied for the localization of buried cylinders by means of a linear array. The procedure is relevant to the localization of objects in the near field of the array, using some sub ...
Meschino S   +2 more
core  

Infrared scanning near-field optical microscopy investigates order and clusters in model membranes [PDF]

open access: yes
Due to its surface sensitivity and high spatial resolution, scanning near-field optical microscopy (SNOM) has a significant potential to study the lateral organization of membrane domains and clusters.
Generosi, J.   +7 more
core   +1 more source

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