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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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Published on: November 30, 2012

Engineering Chiral Light-Matter Interactions in a Waveguide-Coupled Nanocavity.

Dominic Hallett¹, Andrew P Foster¹, David Whittaker¹

¹Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom.

|April 18, 2022

Summary

This summary is machine-generated.

We demonstrate a method for creating spin-photon interfaces using waveguide-coupled nanocavities. This approach enables efficient, spin-dependent chiral light-matter interactions for quantum networks.

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Area of Science:

Quantum optics
Solid-state physics
Nanophotonics

Background:

Chiral quantum networks rely on spin-dependent light-matter interactions.
Solid-state quantum emitters often have circularly polarized optical transitions with spin-dependent handedness.

Purpose of the Study:

To numerically demonstrate spin-dependent chiral coupling in a waveguide-coupled nanocavity.
To enable the development of highly coherent spin-photon interfaces for nanophotonic circuits.

Main Methods:

Embedding a quantum emitter in a nanocavity supporting two near-degenerate, orthogonally polarized cavity modes.
Utilizing direction-dependent interference between cavity modes coupled to two single-mode output waveguides.

Main Results:

Achieved spin-dependent chiral coupling.
Demonstrated near-unity chiral contrast.
Obtained efficient (>95%) cavity-waveguide coupling.
Enhanced light-matter interaction strength (Purcell factor > 70).

Conclusions:

The proposed nanocavity design enables efficient, spin-dependent chiral light-matter interactions.
This facilitates the creation of high-performance spin-photon interfaces.
The interfaces are suitable for integration into nanophotonic circuits for quantum networks.