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Related Concept Videos

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:
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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Development of multi-frequency ESR/EDMR system using a rectangular cavity equipped with waveguide window.

Kunito Fukuda1, Naoki Asakawa1

  • 1Division of Molecular Science, Graduate School of Science and Technology, Gunma university, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan.

The Review of Scientific Instruments
|December 3, 2016
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Summary
This summary is machine-generated.

A new variable frequency electron spin resonance/electrically detected magnetic resonance (ESR/EDMR) method allows quasi-continuous multiple resonance frequency experiments for electronic devices. This technique offers a simpler approach for characterizing electronic and optoelectronic devices.

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Area of Science:

  • Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Electron Spin Resonance (ESR) and Electrically Detected Magnetic Resonance (EDMR) are powerful techniques for probing electron spin properties.
  • Conventional ESR/EDMR methods often face limitations in sample volume and experimental flexibility.
  • Characterization of electronic and optoelectronic devices requires advanced spectroscopic techniques.

Purpose of the Study:

  • To present a straightforward method for variable frequency ESR/EDMR spectroscopy.
  • To enable quasi-continuous multiple resonance frequency (MF-ESR/EDMR) experiments on electronic devices.
  • To facilitate the characterization of electronic and optoelectronic devices.

Main Methods:

  • Utilized a C-band microwave cavity equipped with waveguide windows for variable frequency ESR/EDMR.
  • Employed a C-band microwave circuitry to achieve a larger sample volume compared to X-band systems.
  • Conducted measurements using a combined sample of 2,2-diphenyl-1-picrylhydrazyl/pn-junction Si diode.

Main Results:

  • Successfully demonstrated a simple and effective method for MF-ESR/EDMR spectroscopy.
  • The C-band system provided a larger sample volume, enhancing experimental capabilities.
  • The developed technique was validated using a standard ESR/EDMR sample.

Conclusions:

  • The presented variable frequency ESR/EDMR method is a simple and versatile tool.
  • This technique is suitable for quasi-continuous MF-ESR/EDMR experiments on electronic devices.
  • The method will be valuable for the characterization of electronic and optoelectronic devices.