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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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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Atom-mediated spontaneous parametric down-conversion in periodic waveguides.

Sina Saravi, Alexander N Poddubny, Thomas Pertsch

|November 16, 2017

Summary

This summary is machine-generated.

We introduce atom-mediated spontaneous parametric down-conversion, enabling photon-pair generation using a single atom and nonlinear waveguide. This method offers a heralded excitation mechanism for quantum information processing.

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Area of Science:

Quantum Optics
Condensed Matter Physics
Nanophotonics

Background:

Spontaneous parametric down-conversion (SPDC) is a key quantum light source.
Existing SPDC methods lack precise control over photon generation.
Atom-light interactions offer novel quantum control mechanisms.

Purpose of the Study:

To propose and model atom-mediated spontaneous parametric down-conversion (SPDC).
To investigate photon-pair generation controlled by a single two-level emitter.
To explore the heralding mechanism and robustness against losses.

Main Methods:

Utilizing bandgap evanescent modes of a nonlinear periodic waveguide.
Employing a guided signal mode and an evanescent idler mode.
Applying a rigorous Green's function quantization method for modeling.
Analyzing a heralded excitation mechanism.

Main Results:

Demonstrated photon-pair generation mediated by a single two-level emitter.
Established a heralded excitation mechanism where signal photon detection heralds emitter excitation.
Modeled the system in a 1D periodic waveguide.

Conclusions:

Atom-mediated SPDC provides a novel pathway for controlled photon-pair generation.
The heralded excitation mechanism shows potential for quantum information applications.
The proposed method exhibits robustness against losses in periodic waveguides.