scholarly journals Coherent terahertz microscopy of modal field distributions in micro-resonators

APL Photonics ◽  
2021 ◽  
Vol 6 (6) ◽  
pp. 066104
Author(s):  
Nikollao Sulollari ◽  
James Keeley ◽  
SaeJune Park ◽  
Pierluigi Rubino ◽  
Andrew D. Burnett ◽  
...  
Keyword(s):  
Field Distributions ◽  
Modal Field

A Circular Plane-Mirror Laser Interferometer Containing an Angular-Limiting Device

1973 ◽  
Vol 51 (19) ◽  
pp. 2114-2117
Author(s):  
K. O. Hill ◽  
C. K. Campbell
Keyword(s):  
Integral Equation ◽  
Steady State ◽  
Laser Interferometer ◽  
Plane Mirror ◽  
Field Distributions ◽  
Modal Field ◽  
Circular Plane

The integral equation is derived for the steady-state modal-field distributions in a circular plane-mirror laser interferometer containing a symmetrically positioned angular-limiting device. It is shown that this equation reduces to the corresponding Fox and Li formulation in the limit when the aperture is fully opened.

Dynamic Scanning Electron Microscopy of Small Particles

1975 ◽  
Vol 33 ◽  
pp. 280-281
Author(s):  
W. Krakow ◽  
W. C. Nixon
Keyword(s):  
Electron Microscopy ◽  
Low Noise ◽  
Time Sequence ◽  
Field Of View ◽  
Video Tape ◽  
Small Particles ◽  
Polystyrene Spheres ◽  
Field Distributions ◽  
Dynamic Scanning ◽  
Scanning Electron

The scanning electron microscope (SEM) can be run at television scanning rates and used with a video tape recorder to observe dynamic specimen changes. With a conventional tungsten source, a low noise TV image is obtained with a field of view sufficient to cover the area of the specimen to be recorded. Contrast and resolution considerations have been elucidated and many changing specimens have been studied at TV rates.To extend the work on measuring the magnitude of charge and field distributions of small particles in the SEM, we have investigated their motion and electrostatic interaction at TV rates. Fig. 1 shows a time sequence of polystyrene spheres on a conducting grating surface inclined to the microscope axis. In (la) there are four particles present in the field of view, while in (lb) a fifth particle has moved into view.

scholarly journals Ultrasonic Scattered Field Distribution of One and Two Cylindrical Solids with Phased Array Technique

2019 ◽  
Vol 32 (1) ◽  
Author(s):  
Xiaozhou Liu ◽  
Jian Ma ◽  
Haibin Wang ◽  
Sha Gao ◽  
Yifeng Li ◽  
...  
Keyword(s):  
Plane Wave ◽  
Field Distribution ◽  
Scattered Field ◽  
Phased Array ◽  
Simulation Analysis ◽  
Plane Waves ◽  
Theoretical Solution ◽  
Steel Matrix ◽  
Field Distributions ◽  
Scattered Fields

AbstractThe scattered fields of plane waves in a solid from a cylinder or sphere are critical in determining its acoustic characteristics as well as in engineering applications. This paper investigates the scattered field distributions of different incident waves created by elastic cylinders embedded in an elastic isotropic medium. Scattered waves, including longitudinal and transverse waves both inside and outside the cylinder, are described with specific modalities under an incident plane wave. A model with a scatterer embedded in a structural steel matrix and filled with aluminum is developed for comparison with the theoretical solution. The frequency of the plane wave ranged from 235 kHz to 2348 kHz, which corresponds to scaling factors from 0.5 to 5. Scattered field distributions in matrix materials blocked by an elastic cylindrical solid have been obtained by simulation or calculated using existing parameters. The simulation results are in good agreement with the theoretical solution, which supports the correctness of the simulation analysis. Furthermore, ultrasonic phased arrays are used to study scattered fields by changing the characteristics of the incident wave. On this foundation, a partial preliminary study of the scattered field distribution of double cylinders in a solid has been carried out, and the scattered field distribution at a given distance has been found to exhibit particular behaviors at different moments. Further studies on directivities and scattered fields are expected to improve the quantification of scattered images in isotropic solid materials by the phased array technique.

Magnetic field distributions and energy losses resulting from metal tape motion

1967 ◽  
Vol 3 (3) ◽  
pp. 546-551
Author(s):  
S. Ohteru ◽  
H. Kobayashi ◽  
I. Nashiyama
Keyword(s):  
Magnetic Field ◽  
Energy Losses ◽  
Field Distributions ◽  
Metal Tape
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