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Standing Waves in a Cavity

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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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Related Experiment Video

Updated: Jun 13, 2026

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

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Published on: September 26, 2014

High wavevector optical phonons in microstructured Bismuth films.

Zhiyuan Chen¹, Brian C Minch, Matthew F DeCamp

¹Department of Physics and Astronomy, University of Delaware Newark, DE 19716, USA.

|April 15, 2010

Summary

This summary is machine-generated.

Researchers generated high-amplitude optical phonons in bismuth films using ultrafast laser pulses. This technique could enable efficient sub-picosecond switching for hard X-rays.

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Area of Science:

Condensed Matter Physics
Ultrafast Phenomena
Materials Science

Background:

Coherent optical phonons are crucial for controlling material properties.
Generating high-amplitude and high-wavevector phonons is challenging.
Bismuth is a material with potential for ultrafast applications.

Purpose of the Study:

To demonstrate the generation of high wavevector, large amplitude coherent optical phonons.
To explore the potential of microstructured bismuth films for ultrafast applications.
To investigate a novel method for generating efficient sub-picosecond switches for hard X-rays.

Main Methods:

Fabrication of a microstructured bismuth film with a periodic grating.
Optical excitation of the film using a femtosecond laser pulse.
Characterization of coherent optical phonon oscillations.

Main Results:

Successfully generated coherent optical phonon oscillations.
Achieved high wavevectors up to 1 microm(-1).
Observed large amplitude oscillations.

Conclusions:

Microstructured bismuth films can support high wavevector, large amplitude coherent optical phonons.
This method offers a promising route for developing efficient sub-picosecond switches for hard X-rays.
The findings open new avenues in ultrafast science and X-ray technology.