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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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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Aperiodic distributed-parameter waveguides for integrated optics.

|February 6, 2010

Summary

This summary is machine-generated.

Aperiodic perturbations in optical waveguides can control light reflection and filtering. This method allows for precise tuning of spectral responses in integrated optics devices.

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Area of Science:

Integrated optics
Waveguide theory
Photonics

Background:

Aperiodic waveguides offer unique optical properties.
Distributed-parameter waveguides are key components in integrated optics.
Controlling modal propagation is essential for optical device functionality.

Purpose of the Study:

To investigate the use of aperiodic perturbations in waveguides for optical applications.
To predict the effects of aperiodic perturbations on modal propagation using coupled-mode theory.
To demonstrate the potential for creating tunable optical reflectors and filters.

Main Methods:

Applied coupled-mode theory to analyze modal propagation in aperiodic waveguides.
Investigated the coupling between forward and backward-traveling bound modes.
Calculated spectral-response characteristics for various filter designs.

Main Results:

Aperiodic perturbations can effectively couple forward and backward-traveling modes.
The frequency dependence of this coupling is controllable via the aperiodicity.
Demonstrated the realization of narrow band-stop, broadband-stop, and narrow band-pass filters.

Conclusions:

Aperiodic coupling in waveguides provides a method for designing optical reflectors and filters.
This approach enables the creation of devices with predetermined spectral-response characteristics.
Aperiodic distributed-parameter waveguides are promising for advanced integrated optics.