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Related Concept Videos

Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

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The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
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Related Experiment Video

Updated: Mar 15, 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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Domain engineering algorithm for practical and effective photon sources.

J-L Tambasco, A Boes, L G Helt

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    |August 25, 2016
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new method to control light source spectra by engineering quasi-phase matching. This technique produces highly pure heralded single photons, ideal for quantum optics applications.

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    Area of Science:

    • Nonlinear optics
    • Quantum optics
    • Materials science

    Background:

    • Tailoring spectral response is crucial for nonlinear light sources.
    • Quasi-phase matching (QPM) is a key technique for controlling nonlinear optical processes.
    • Generating pure heralded single photons is essential for quantum information technologies.

    Purpose of the Study:

    • To introduce a novel method for shaping the spectral response of nonlinear light sources.
    • To develop an algorithm for engineering quasi-phase matching (QPM) by tailoring the poling process.
    • To demonstrate the generation of high-purity heralded single photons using the proposed method.

    Main Methods:

    • Developed an algorithm to engineer the poling pattern based on the target signal field amplitude.
    • Utilized a nonlinear beam propagation method simulation for verification.
    • Applied the method to a potassium titanyl phosphate (KTP) crystal.

    Main Results:

    • The proposed poling algorithm generates a robust and manufacturable poling pattern with equal domain inversion widths.
    • Achieved Gaussian-shaped phase matching in a KTP crystal.
    • Generated heralded single photons with a high spectral purity of approximately 0.996.

    Conclusions:

    • The developed method effectively shapes the spectral response of nonlinear light sources.
    • The engineered poling pattern offers improved manufacturability and robustness.
    • The technique enables the generation of high-quality heralded single photons for advanced quantum optics.