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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: Apr 12, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Reflectionless compact plasmonic waveguide mode converter by using a mode-selective cavity.

Joonsoo Kim, Seung-Yeol Lee, Hyeonsoo Park

|May 14, 2015

Summary

This summary is machine-generated.

A new plasmonic waveguide mode converter eliminates unwanted reflections and transmissions. This compact device uses a cavity with mode-selective mirrors for efficient signal routing in integrated photonic systems.

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Last Updated: Apr 12, 2026

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Area of Science:

Photonics and Plasmonics
Integrated Optics

Background:

Unwanted reflections and transmission of unconverted modes are significant challenges in integrated photonic systems.
Plasmonic waveguides offer potential for miniaturization but require efficient mode conversion.

Purpose of the Study:

To propose a compact transmissive plasmonic waveguide mode converter.
To eliminate reflection and transmission of unconverted modes.

Main Methods:

Utilizing a cavity formed by mode-selective mirrors.
Tuning cavity lengths to achieve destructive interference for mode suppression.

Main Results:

The device allows only transmission of the target mode and reflection of the input mode.
Near-zero reflection of the input mode is achieved by destructive interference.
Suppression of all residual outgoing modes is demonstrated.

Conclusions:

The proposed plasmonic waveguide mode converter effectively eliminates unwanted reflections and transmissions.
This device simplifies the design of integrated photonic systems by addressing reflection issues.
The compact nature and high efficiency make it suitable for advanced photonic integration.