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Standing Waves in a Cavity

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:

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Updated: May 9, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Published on: December 11, 2013

Continuous wave nanowire lasing.

Robert Röder¹, Marcel Wille, Sebastian Geburt

¹Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Jena, Germany. robert.roeder@uni-jena.de

|July 19, 2013

Summary

This summary is machine-generated.

Tin-doped cadmium sulfide nanowires exhibit ideal resonator morphology for continuous wave lasing. These nanowires demonstrate donor-acceptor pair transitions and stable lasing up to 120 K due to electron-hole plasma.

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Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Semiconductor nanowires are promising for optoelectronic applications.
Cadmium sulfide (CdS) is a well-studied semiconductor with tunable properties.
Doping is a key strategy to modify semiconductor characteristics.

Purpose of the Study:

To investigate the optical properties of tin-doped cadmium sulfide (Sn-CdS) nanowires.
To explore their potential for lasing applications.
To understand the temperature-dependent lasing behavior.

Main Methods:

Low-temperature photoluminescence spectroscopy was used to analyze optical transitions.
Continuous wave (CW) pumping was employed to induce and study lasing.
The evolution of emitted power and spectrum with pump intensity was examined.

Main Results:

Sn-CdS nanowires exhibit donor-acceptor pair transitions.
The nanowires possess ideal resonator morphology suitable for lasing.
Continuous wave lasing was confirmed by power and spectral analysis.
Stable lasing was observed up to 120 Kelvin.

Conclusions:

Tin-doped cadmium sulfide nanowires are excellent candidates for CW laser applications.
The observed lasing stability at elevated temperatures is attributed to the electron-hole plasma dynamics.
Further research can explore optimizing Sn-CdS nanowires for advanced photonic devices.