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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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Related Experiment Video

Updated: May 19, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Published on: December 11, 2013

Wavelength-converted/selective waveguiding based on composition-graded semiconductor nanowires.

Jinyou Xu¹, Xiujuan Zhuang, Pengfei Guo

¹Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Physics and Microelectronics Science, Hunan University, Changsha 410082, China.

|August 7, 2012

Summary

This summary is machine-generated.

Composition-graded cadmium sulfide selenide (CdS(x)Se(1-x)) nanowires guide light passively or actively convert wavelengths. This enables new nanoscale wavelength splitters for integrated nanophotonic devices.

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Last Updated: May 19, 2026

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Area of Science:

Materials Science
Nanotechnology
Optoelectronics

Background:

Compact wavelength-sensitive optical components are crucial for integrated photonic systems in optical information processing and communication.
Semiconductor nanowires offer unique properties for miniaturized optical devices.

Purpose of the Study:

To systematically investigate optical waveguiding in single composition-graded cadmium sulfide selenide (CdS(x)Se(1-x)) nanowires.
To explore the potential of these graded nanowires for developing novel wavelength-sensitive optical components.

Main Methods:

Composition-graded CdS(x)Se(1-x) nanowires were synthesized and characterized.
Optical waveguiding was studied under focused laser excitation.
A nanoscale wavelength splitter was demonstrated using branched nanowire structures.

Main Results:

Light was guided passively along the bandgap-increased direction with minimal energy change.
Light was guided actively along the bandgap-decreased direction, undergoing gradual wavelength conversion via reabsorption and re-emission.
A functional nanoscale wavelength splitter was successfully assembled and demonstrated.

Conclusions:

Composition-graded semiconductor nanowires exhibit distinct passive and active waveguiding behaviors.
These graded nanowires are promising for creating new wavelength-sensitive optical components for integrated nanophotonic devices.
The demonstrated wavelength splitter highlights the potential for advanced optical signal processing at the nanoscale.