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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: Feb 26, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Dynamic Color Displays Using Stepwise Cavity Resonators.

Yiqin Chen¹, Xiaoyang Duan^2,3, Marcus Matuschek³

¹State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, College of Mechanical and Vehicle Engineering, Hunan University , 410082 Changsha, People's Republic of China.

|July 20, 2017

Summary

This summary is machine-generated.

This study introduces dynamic color printing using magnesium nanostructures. This novel approach enables advanced color displays and information encryption through reversible metal-dielectric transitions.

Keywords:

Color printing Fabry-Pérot cavity resonators dynamic color displays gray scale nanolithography hydrogen magnesium

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Area of Science:

Optics and Photonics
Materials Science
Nanotechnology

Background:

High-resolution multicolor printing relies on optical nanostructures but is limited to static colors.
Dynamic color displays with advanced functionalities are crucial for future applications.

Purpose of the Study:

To develop a novel dynamic color printing scheme using pixelated nanostructures.
To enable advanced functionalities like information encryption and tunable color generation.

Main Methods:

Utilized magnesium-based pixelated Fabry-Pérot cavities fabricated by grayscale nanolithography.
Employed controlled hydrogenation and dehydrogenation for reversible metal-dielectric transitions in magnesium.

Main Results:

Demonstrated dynamic Ishihara plates readable only with hydrogen, showcasing information encryption.
Achieved dynamic transformations between black/white and color printing with fine tonal control.

Conclusions:

The developed dynamic color printing scheme offers innovative functionalities for displays and security applications.
This technology has potential applications in full-color printing, sensing, and anticounterfeiting.