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Related Concept Videos

Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Magnetic Field Due To A Thin Straight Wire01:27

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The Debye-Hückel-Onsager equation is a cornerstone of physical chemistry, providing a method to determine the molar conductance (Λm) and molar conductance at infinite dilution (Λ°m) for uni-univalent electrolytes.Uni-univalent electrolytes are electrolytes that dissociate in solution to produce one cation with a +1 charge and one anion with a –1 charge per formula unit.This equation addresses two crucial phenomena: the asymmetry effect and the electrophoretic effect. According to this equation,...
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Related Experiment Video

Updated: Jul 16, 2026

Silicon Nanowires and Optical Stimulation for Investigations of Intra- and Intercellular Electrical Coupling
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Modeling of evanescent coupling between two parallel optical nanowires.

Keji Huang1, Shuangyang Yang, Limin Tong

  • 1State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China.

Applied Optics
|March 6, 2007
PubMed
Summary

Strongly coupled nanowires exhibit reduced transfer lengths and high coupling efficiency for compact photonic devices. This research offers insights into evanescent coupling for efficient nanowire interconnections and optical systems.

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Area of Science:

  • Photonics
  • Nanotechnology
  • Optical Engineering

Background:

  • Evanescent coupling is crucial for optical signal transmission in nanoscale waveguides.
  • Understanding coupling dynamics in parallel nanowires is key for miniaturized photonic circuits.

Purpose of the Study:

  • To investigate evanescent coupling between parallel nanowires.
  • To explore the potential of strongly coupled nanowires for compact photonic devices and interconnections.

Main Methods:

  • Utilized the finite-difference time-domain (FDTD) method for numerical simulation.
  • Simulated evanescent coupling in silica, tellurite, and silicon nanowires.

Main Results:

  • Strongly coupled nanowires demonstrated significantly smaller transfer lengths compared to weakly coupled waveguides.
  • High coupling efficiencies were maintained in strongly coupled nanowire systems.
  • Observed polarization-dependent coupling, high minimum coupling efficiency, and supermode-cutoff-like behavior.

Conclusions:

  • Strongly coupled nanowires enable the development of highly compact evanescent-coupling-based photonic devices.
  • The findings suggest efficient interconnection possibilities between nanowires and external optical systems.
  • The demonstrated evanescent coupling properties provide valuable references for optical nanowire applications.