Sensitivity of the second resonance mode of a near-field acoustic sensor to viscoelastic media: Investigation of bitumens

2000 ◽  
Vol 10 (2) ◽  
pp. 149-155 ◽  
Author(s):  
J. Y. Ferrandis ◽  
H. Nounah ◽  
B. Cros
Keyword(s):  
Near Field ◽  
Resonance Mode ◽  
Acoustic Sensor ◽  
Viscoelastic Media

Measurement of fluid properties with a near-field acoustic sensor

1999 ◽  
Vol 75 (2) ◽  
pp. 295-297 ◽  
Author(s):  
R. Patois ◽  
P. Vairac ◽  
B. Cretin
Keyword(s):  
Near Field ◽  
Acoustic Sensor ◽  
Fluid Properties

scholarly journals Broad Bandwidth, Self‐Powered Acoustic Sensor Created by Dynamic Near‐Field Electrospinning of Suspended, Transparent Piezoelectric Nanofiber Mesh

Small ◽  
2020 ◽  
Vol 16 (28) ◽  
pp. 2000581 ◽  
Author(s):  
Wenyu Wang ◽  
Patrick N. Stipp ◽  
Karim Ouaras ◽  
Saeed Fathi ◽  
Yan Yan Shery Huang
Keyword(s):  
Near Field ◽  
Acoustic Sensor ◽  
Broad Bandwidth ◽  
Self Powered ◽  
Nanofiber Mesh

Demonstration of toroidal metasurfaces through near-field coupling of bright mode resonators

2021 ◽  
Author(s):  
Soumyajyoti Mallick ◽  
Nitin Chourasia ◽  
Rakesh Singh ◽  
Dibakar Roy Chowdhury
Keyword(s):  
Mode Coupling ◽  
Near Field ◽  
Magnetic Moments ◽  
Resonance Mode ◽  
Complex Structures ◽  
Dark Mode ◽  
Field Coupling ◽  
Mode Interactions ◽  
Resonance Coupling ◽  
Bright Mode

Abstract Bright mode resonances are not well-acknowledged for inducing mode hybridizations. However, we demonstrate multiple bright resonators coupled through electromagnetic fields can induce resonance mode hybridizations. Although one of the hybridized modes shows parallel magnetic moments but the other mode demonstrates anti-parallel magnetic moments leading to magnetic toroidal resonances. Normally excitation of toroidal modes demands complex structures and/or bright-dark mode interactions. However, in this work, we employ solely bright resonators to excite toroidal modes. Unlike bright-dark mode coupling, exclusive bright mode resonance coupling enables larger free space energy merging into the metasystem leading to stronger energy confinement in the metasurface array.

Near-field scanning optical microscopy

1986 ◽  
Vol 44 ◽  
pp. 642-643
Author(s):  
E. Betzig ◽  
A. Harootunian ◽  
M. Isaacson ◽  
A. Lewis
Keyword(s):  
Near Field ◽  
Optical Microscope ◽  
Visible Radiation ◽  
Field Methods ◽  
Optical Elements ◽  
Optical Region ◽  
Order Of Magnitude ◽  
Nondestructive Imaging ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

In general, conventional methods of optical imaging are limited in spatial resolution by either the wavelength of the radiation used or by the aberrations of the optical elements. This is true whether one uses a scanning probe or a fixed beam method. The reason for the wavelength limit of resolution is due to the far field methods of producing or detecting the radiation. If one resorts to restricting our probes to the near field optical region, then the possibility exists of obtaining spatial resolutions more than an order of magnitude smaller than the optical wavelength of the radiation used. In this paper, we will describe the principles underlying such "near field" imaging and present some preliminary results from a near field scanning optical microscope (NS0M) that uses visible radiation and is capable of resolutions comparable to an SEM. The advantage of such a technique is the possibility of completely nondestructive imaging in air at spatial resolutions of about 50nm.

Principles of Planar Near-Field Antenna Measurements

2007 ◽  
Author(s):  
Stuart Gregson ◽  
John McCormick ◽  
Clive Parini
Keyword(s):  
Near Field ◽  
Antenna Measurements
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