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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Periodically poled thin-film lithium niobate ring Mach Zehnder coupling interferometer as an efficient quantum light

Mrinmoy Kundu, Bejoy Sikder, Heqing Huang

    Optics Express
    |November 11, 2025
    PubMed
    Summary

    We developed a novel symmetric ring-Mach-Zehnder interferometer (RMZI) for generating both single photons and squeezed light. This device offers high purity and efficiency, crucial for quantum computing and communication advancements.

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    Area of Science:

    • Quantum Optics
    • Photonic Quantum Technologies

    Background:

    • Single photons and squeezed light are essential for quantum computation and communication.
    • High-efficiency generation of these quantum states is critical for advancing photonic quantum computers and continuous-variable quantum computing.

    Purpose of the Study:

    • To propose and numerically demonstrate a novel symmetric ring-Mach-Zehnder interferometer (RMZI).
    • To utilize the RMZI as an efficient source for both squeezed light and single photons.

    Main Methods:

    • Numerical simulation of a symmetric ring-Mach-Zehnder interferometer (RMZI).
    • Integration of a periodically poled lithium niobate (PPLN) waveguide within the RMZI design.
    • Analysis of generated squeezed light and single-photon properties.

    Main Results:

    • Tunable squeezed light generation with a squeezing level > -12 dB at sub-milli-watt pump power.
    • Single-photon generation with 99(95)% purity and 94(99)% heralding efficiency using 20 ps pulses.
    • Demonstrated compatibility with current fabrication technologies.

    Conclusions:

    • The proposed symmetric RMZI is a versatile and efficient source for both squeezed light and single photons.
    • This integrated photonic device meets key requirements for scalable quantum information processing.
    • The design offers a promising pathway for practical quantum technologies.