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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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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

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Published on: July 8, 2013

Design of plasmonic cavities.

Soon-Hong Kwon¹, You-Shin No², Hong-Gyu Park²

¹Department of Physics, Chung-Ang University, Seoul, 156-756 Republic of Korea.

Nano Convergence

|February 14, 2017

Summary

We explored unique optical properties of 3D subwavelength plasmonic cavities. These cavities confine surface-plasmon-polaritons, enabling novel plasmonic lasers for miniaturized photonic circuits.

Area of Science:

Photonics and Nanotechnology
Plasmonics
Optical Cavities

Background:

Surface-plasmon-polaritons (SPPs) are electromagnetic waves propagating at dielectric-metal interfaces.
Confining SPPs in cavities is crucial for developing advanced optical devices.
Subwavelength cavities offer enhanced light-matter interactions and miniaturization potential.

Purpose of the Study:

To review the unique optical properties of high-quality, 3D, subwavelength-scale plasmonic cavities.
To analyze the confinement of SPPs within these cavities.
To explore the potential for novel plasmonic lasers and ultra-compact photonic integrated circuits.

Main Methods:

Utilizing three-dimensional finite-difference time-domain (3D FDTD) simulations.

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Calculating and analyzing plasmonic mode field profiles.

Investigating temperature-dependent quality factors and subwavelength mode volumes.

Main Results:

Demonstrated strong confinement of SPPs in 3D subwavelength plasmonic cavities.
Systematic analysis of plasmonic mode characteristics.
Identified key parameters for cavity design and performance.

Conclusions:

High-quality plasmonic cavities offer unique optical properties.
These cavities are promising for realizing novel plasmonic lasers.
Potential for significant miniaturization of coherent light sources in photonic integrated circuits.