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Updated: Jun 20, 2026

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

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Subpicosecond accumulated photon echoes using a continuous-wave multimode diode laser.

H Nakatsuka, Y Matsumoto, K Inouye

    Optics Letters
    |September 16, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    Subpicosecond accumulated photon echoes were observed in a specific dye molecule using a diode laser. The measured dephasing time aligns with persistent hole width measurements.

    Area of Science:

    • Physical Chemistry
    • Spectroscopy
    • Materials Science

    Background:

    • Investigating ultrafast dynamics in organic molecules is crucial for understanding light-matter interactions.
    • Organic dyes embedded in solid matrices offer model systems for studying dephasing processes.

    Purpose of the Study:

    • To observe subpicosecond accumulated photon echoes in a specific cyanine dye.
    • To determine the dephasing time of the molecule in a polyvinyl alcohol matrix.
    • To compare the dephasing time with persistent hole width measurements.

    Main Methods:

    • Utilized subpicosecond accumulated photon echo spectroscopy.
    • Employed a continuous-wave (cw) multimode diode laser.
    • Performed measurements on 1,3,3,1',3',3'-hexamethyl-2,2'-indotricarbocyanine iodide in polyvinyl alcohol at 10 K.

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    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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    Published on: May 30, 2014

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    Last Updated: Jun 20, 2026

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

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    Published on: September 5, 2019

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

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    Main Results:

    • Successfully observed subpicosecond accumulated photon echoes.
    • Determined a dephasing time of 40 picoseconds (psec) from the echo decay curve.
    • Achieved good agreement between the derived dephasing time and the persistent hole width.

    Conclusions:

    • Subpicosecond accumulated photon echo spectroscopy is effective for studying ultrafast dynamics in organic dyes.
    • The dephasing dynamics of the studied dye are consistent with persistent spectral hole burning results.
    • This study provides insights into the relaxation mechanisms of cyanine dyes in solid matrices.