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Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

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Tunable squeezing using coupled ring resonators on a silicon nitride chip.

Avik Dutt, Steven Miller, Kevin Luke

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Summary

This summary is machine-generated.

Researchers tuned quantum squeezing levels in an optical parametric oscillator using microheaters. This advancement enables adaptable quantum-enhanced sensing by precisely controlling squeezing for optimal performance.

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Area of Science:

Quantum optics
Integrated photonics
Materials science

Background:

Optical parametric oscillators (OPOs) are crucial for generating non-classical states of light, such as squeezed states.
Precise control over squeezing levels is essential for optimizing quantum-enhanced sensing applications.
Integrated photonic devices offer miniaturization and enhanced control capabilities for quantum technologies.

Purpose of the Study:

To demonstrate continuous tuning of squeezing levels in a double-ring optical parametric oscillator.
To leverage the avoided crossing phenomenon in coupled microring resonators for tuning.
To enable on-chip, adaptable quantum-enhanced sensing protocols.

Main Methods:

Utilizing a double-ring optical parametric oscillator based on coupled silicon nitride microring resonators.
Employing electrically controlled integrated microheaters to externally tune the coupling condition.
Directly detecting changes in the generated squeezing level across different coupling regimes.

Main Results:

Achieved continuous tuning of the squeezing level.
Observed a change in squeezing level from 0.5 dB (undercoupled) to 2 dB (overcoupled).
Reported a corresponding change in the on-chip squeezing factor from 0.9 to 3.9 dB.

Conclusions:

Demonstrated a novel method for wide tunability of on-chip squeezing levels.
The developed technique is compatible with integrated photonic platforms.
The tunable squeezing offers a versatile resource for advanced quantum-enhanced sensing applications.