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    • Quantum

    Recent

    (Image credit: SPIE)
    2025 SPIE Prism Award finalists and award recipients will be honored during a January 29th gala evening at SPIE Photonics West.
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    Highlights

    (Image credit: Phlux Technology)
    FIGURE 1. Cryptographic keys ensure controlled access to communication channels.
    Detectors & Imaging

    Quantum key distribution: Secure optical communications

    Ye Cao
    Nov. 18, 2024
    Avalanche photodiodes, infrared sensors capable of detecting single photons, are at the heart of many QKD systems. Their sensitivity allows them to discern the faintest of light...
    (Image credit: NTU Singapore)
    Two thin flakes of niobium oxide dichloride stacked on each other and photographed under a light microscope. One flake’s crystalline grain (gray flake) is positioned perpendicularly to the grain of the other flake (green flake).
    Optics

    Photonics breakthrough can drastically shrink quantum computing parts

    Leevi Kallioniemi
    Nov. 14, 2024
    Very thin materials can create entangled pairs of photons to be used as quantum bits.
    FIGURE 1. Depiction of the ultrahigh-density optical memory. Red dots represent rare earth ion impurities, and blue dots represent defects onto which the excitation is stored by using near-field energy transfer processes. Many optically addressable RE ions within the diffraction-limited excitation volume (red beam) result in an enhanced bit density.
    Quantum

    Near-field energy transfer provides route to ultrahigh-density solid-state optical memories

    Swarnabha Chattaraj
    Nov. 13, 2024
    A combined framework of quantum electrodynamics and quantum mechanical electronic structure theories reveals a promising pathway to exceed the current limitation on data storage...
    (Image credit: Max Planck Institute of Quantum Optics)
    A neutral atom qubit register, which continuously reloads new atoms into the register.
    Optics

    Continuously operated quantum registers with neutral atoms

    Johannes Zeiher
    Nov. 7, 2024
    A qubit register of 1,200 neutral atoms within an optical lattice of laser light designed to ‘reload itself’ was kept in continuous operation for an hour—progress toward scaling...
    (Photo credit: Heriot-Watt University)
    Dr. Ross Donaldson and Professor Gerald Buller pictured with equipment that will be used in the new optical ground station.
    Quantum

    Optical ground stations push boundaries of space technology

    Ross Donaldson
    Oct. 24, 2024
    The Hub Optical Ground Station (HOGS) based at Heriot-Watt University will feature state-of-the-art equipment—single-photon detectors and adaptive optics systems—for quantum key...
    (Photo credit: Besim Mazhiqi, PHoQS, Paderborn University)
    Test & Measurement

    New tool determines characteristics of light-based quantum states

    Sally Cole Johnson
    May 6, 2024
    Researchers develop a technique to measure the quantum mechanical properties of electromagnetic fields at the single-photon level.
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    Quantum

    Quantum Research & Innovation: Welcome!

    Sally Cole Johnson
    April 16, 2024
    I’m thrilled to welcome you to the first issue of Quantum Research & Innovation!
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    Executive Forum

    Optical interconnect companies lead March’s VC deals

    Eric Hall
    April 4, 2024
    Other funding rounds backed companies developing quantum components, LiDAR, and laser-fusion technologies.
    Lasers & Sources

    Tunable alexandrite laser sources emit in near-infrared

    LFW Staff
    Feb. 26, 2024
    Diode-pumped tunable alexandrite laser sources emitting in the near-infrared are used for LiDAR remote sensing, quantum technologies, photoacoustic microscopy, and biosensing....