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Magnetically controlled optical modulator based on coherent perfect absorption in NV centers.

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Area of Science:

Quantum optics
Solid-state physics
Photonics

Background:

Nitrogen-vacancy (NV) centers in diamond are promising solid-state qubits.
Optical resonant cavities enhance light-matter interactions.
Controlling light propagation is crucial for photonic devices.

Purpose of the Study:

To design and demonstrate an optical modulator based on NV centers.
To achieve coherent perfect absorption (CPA) of photons.
To explore magnetic field control for light manipulation.

Main Methods:

Coupling an optical resonant cavity to an ensemble of NV centers.
Utilizing external magnetic fields to control NV center properties.
Modulating input light fields' phase difference.

Main Results:

Demonstrated coherent perfect absorption (CPA) of photons.
Showcased suppression, blocking, and amplification of light transmission.
Tuned light transmission via magnetic field manipulation (amplitude, direction, detuning).

Conclusions:

The designed optical modulator offers precise control over light.
NV centers provide a highly controllable platform for photonic applications.
This work paves the way for advanced magnetic-field-controlled photonic devices.