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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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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Published on: April 1, 2020

Phased-array sources based on nonlinear metamaterial nanocavities.

Omri Wolf^1,2, Salvatore Campione^1,2, Alexander Benz^1,2

¹Center for Integrated Nanotechnologies, Sandia National Laboratories, PO Box 5800, Albuquerque, New Mexico 87185, USA.

Nature Communications

|July 2, 2015

Summary

This summary is machine-generated.

Researchers developed new infrared phased-array sources using metamaterial nanocavities. This breakthrough enables precise control over optical beam direction, shape, and polarization for advanced photonic applications.

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Area of Science:

Optics and Photonics
Metamaterials
Nonlinear Optics

Background:

Coherent superposition of light from subwavelength sources is crucial for manipulating optical beams.
Phased arrays are established at microwave and radio frequencies but are challenging at infrared frequencies.
Metamaterials offer unique optical properties for novel device designs.

Purpose of the Study:

To propose a new concept for infrared phased-array sources.
To enable arbitrary control over optical beam shape and polarization.
To demonstrate practical applications of infrared phased arrays.

Main Methods:

Coupling metamaterial nanocavities to a highly nonlinear semiconductor heterostructure.
Inducing localized, phase-locked, nonlinear resonant polarization via optical pumping.
Designing nanocavities to tailor beam characteristics.

Main Results:

Demonstrated two second harmonic phased-array sources operating at ~5 μm.
Successfully implemented beam splitting and polarizing beam splitting functions.
Showcased the potential for arbitrary beam shaping and polarization control.

Conclusions:

The proposed metamaterial nanocavity concept is a viable approach for infrared phased-array sources.
This technology can be extended across the infrared spectrum with appropriate design.
Offers a new platform for advanced optical beam manipulation.