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Related Concept Videos

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
Biasing of FET01:22

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MOSFET Amplifiers01:17

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Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
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Published on: August 8, 2025

Intensity difference squeezing in a strongly overcoupled silicon nitride microresonator.

Sara Persia, Yi Sun, Vaishali Adya

    Optics Letters
    |May 15, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a silicon nitride microring resonator for enhanced quantum noise reduction. This integrated device achieves high squeezing levels, crucial for advanced sensing applications and surpassing the quantum noise limit.

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    Area of Science:

    • Quantum optics
    • Integrated photonics
    • Nonlinear optics

    Background:

    • Integrated nonlinear microring resonators generate twin-beams with intensity difference squeezing.
    • High squeezing levels are needed for applications utilizing quantum noise reduction.
    • On-chip squeezing is limited by the ratio of intrinsic to coupling loss.

    Purpose of the Study:

    • To engineer a microring resonator for achieving high on-chip squeezing levels.
    • To overcome design and fabrication limits in integrated quantum devices.
    • To enable miniaturized devices for applications benefiting from squeezed states.

    Main Methods:

    • Demonstration of a silicon nitride microring resonator.
    • Engineering for periodic strongly overcoupled resonances.
    • Suppression of mode competition in surrounding modes.

    Main Results:

    • Estimated on-chip intensity difference squeezing of 11.8 dB.
    • Directly measured squeezing of 1.4±0.2 dB, corresponding to 9.2±5.1 dB on-chip.
    • New design inherently suppresses mode competition, maintaining high squeezing levels.

    Conclusions:

    • The engineered microring resonator significantly advances integrated squeezed light sources.
    • The device offers a pathway to miniaturized quantum-enhanced technologies, particularly for sensing.
    • Results demonstrate a substantial step towards surpassing the quantum noise limit in integrated photonic devices.