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Related Concept Videos

Range00:59

Range

14.1K
The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
14.1K
Position and Displacement01:31

Position and Displacement

25.4K
The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...
25.4K
Displacement Current01:19

Displacement Current

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Ampère's law, in its usual form, does not work in places where the current changes with time and is not steady. Thus, Maxwell suggested including an additional contribution, called the displacement current, Id, to the real conduction current I.
3.8K
Position and Displacement Vectors01:00

Position and Displacement Vectors

12.8K
To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
Further, several important kinds of...
12.8K
Speed of a Transverse Wave01:13

Speed of a Transverse Wave

3.9K
The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
3.9K
Significance of Displacement Current01:27

Significance of Displacement Current

5.8K
A displacement current is analogous to a real current in Ampère's law, participating in Ampère's law the same way as the usual conduction current. However, it is produced by a changing electric field. Displacement current is defined in terms of a time-varying electric field, and also has an associated displacement current density. By adding a term accounting for displacement current, Maxwell modified the existing Ampère's law, which is now called generalized Ampère's law.
5.8K

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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Unidirectional scattering exploited transverse displacement sensor with tunable measuring range.

Wuyun Shang, Fajun Xiao, Weiren Zhu

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    This study introduces a novel transverse displacement sensor using an azimuthally polarized beam and a core-shell nanoparticle. The sensor achieves tunable measurement ranges from nanometers to micrometers for advanced optical nanometrology.

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    Area of Science:

    • Optics and Photonics
    • Nanotechnology
    • Metrology

    Background:

    • Transverse displacement sensing is crucial for nanometrology.
    • Existing sensors have limitations in measuring range and tunability.
    • Core-shell nanoparticles offer unique optical properties for sensing applications.

    Purpose of the Study:

    • To propose a novel scheme for extending the measuring range of a transverse displacement sensor.
    • To exploit the interaction between an azimuthally polarized beam (APB) and a core-shell nanoparticle.
    • To achieve a widely tunable displacement measuring range for optical nanometrology.

    Main Methods:

    • Utilizing the interaction of an azimuthally polarized beam (APB) with a single metal-dielectric core-shell nanoparticle.
    • Inducing a longitudinal magnetic dipole (MD) and transverse electric dipole (ED) in the nanoparticle.
    • Analyzing the interference and transverse unidirectional scattering within the focal plane.

    Main Results:

    • Demonstrated remarkable sensitivity of far-field scattering directivity to nanoscale displacements.
    • Showcased tunability of the measuring range based on structure-dependent Mie scattering coefficients.
    • Achieved a continuous displacement measuring range from several nanometers to a few micrometers.

    Conclusions:

    • The proposed scheme effectively extends the measuring range of transverse displacement sensors.
    • The sensor's tunability and sensitivity make it valuable for modern optical nanometrology.
    • This approach offers a promising solution for high-precision nanoscale measurements.