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Related Concept Videos

Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
Propagation of Waves01:07

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Standing Waves in a Cavity01:28

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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:
Plane Electromagnetic Waves I01:30

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The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Published on: August 30, 2012

Generation of Airy-like wave with one-dimensional waveguide array.

Hongchang Deng1, Libo Yuan

  • 1Key Laboratory of In-Fiber Integrated Optics, Ministry of Education, College of Science, Harbin Engineering University, Harbin, China.

Optics Letters
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

Researchers created Airy-like waves using arrayed waveguides, achieving quasi-nondiffracting and accelerating propagation. This novel approach bypasses traditional cubic phase plates and Fourier lenses for wave generation.

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Area of Science:

  • Photonics and Wave Propagation
  • Optical Wave Generation

Background:

  • Traditional Airy wave generation requires complex optical setups like cubic phase plates and Fourier lenses.
  • Controlling wave propagation and diffraction is crucial in various optical applications.

Purpose of the Study:

  • To propose and demonstrate a novel method for generating Airy-like waves.
  • To investigate the unique propagation characteristics of these generated waves.

Main Methods:

  • Utilizing one-dimensional arrayed waveguides for wave generation.
  • Employing supermode theory and the beam propagation method for theoretical analysis.
  • Numerical simulations to validate theoretical predictions.

Main Results:

  • Successful generation of Airy-like waves with quasi-Airy amplitude and quasi-cubic phase.
  • Demonstrated quasi-nondiffracting and self-accelerating propagation properties.
  • Numerical results showed strong agreement with theoretical models.

Conclusions:

  • Arrayed waveguides offer an effective alternative for generating Airy-like waves.
  • The generated waves exhibit controllable nondiffracting and accelerating behaviors.
  • The findings support the potential of waveguide-based systems for advanced optical wave manipulation.