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Photoluminescence: Fluorescence and Phosphorescence

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Related Experiment Video

Updated: Jul 12, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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

Published on: May 30, 2014

Photon number squeezed States in semiconductor lasers.

Y Yamamoto, S Machida, W H Richardson

    Science (New York, N.Y.)
    |March 6, 1992
    PubMed
    Summary

    Researchers generated nonclassical light using a simple semiconductor laser, achieving significant quantum noise reduction. This method offers a straightforward way to produce squeezed states for precision measurements.

    Area of Science:

    • Quantum Optics
    • Quantum Mechanics

    Background:

    • Squeezed states of light, with noise reduced in one quadrature below zero-point level and enhanced in another, are crucial for precision measurements.
    • Conventional methods for generating squeezed states involve nonlinear unitary evolution on coherent or vacuum states.

    Purpose of the Study:

    • To present a simplified scheme for generating nonclassical light with reduced photon number noise and enhanced phase noise.
    • To explore macroscopic and microscopic quantum effects in open systems via semiconductor lasers.

    Main Methods:

    • Utilizing a constant current-driven semiconductor laser to directly generate squeezed states.
    • Investigating the mutual coupling between a lasing junction and an external electrical circuit.

    Main Results:

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    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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    Published on: September 5, 2019

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    Last Updated: Jul 12, 2026

    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
    09:23

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

    Published on: May 30, 2014

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    • Achieved the simplest scheme for nonclassical light generation to date.
    • Demonstrated the largest quantum noise reduction reported so far.
    • Generated squeezed states with reduced photon number noise and enhanced phase noise.

    Conclusions:

    • Constant current-driven semiconductor lasers offer a highly effective and simple method for producing nonclassical light.
    • The interplay between lasing junctions and electrical circuits provides a platform for studying quantum phenomena in open systems.