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Showing 1–13 of 13 results
Advanced filters: Author: Ronald Holzwarth Clear advanced filters

  • By combining Fourier transform spectroscopy with two frequency-shifted combs and cavity ring-down spectroscopy, scientists demonstrate a powerful new tool for ultrahigh sensitivity spectroscopy. The scheme can measure broadband, high-resolution spectra in tens of microseconds, does not require detector arrays and may allow tuning from terahertz to ultraviolet frequencies.

    • Birgitta Bernhardt
    • Akira Ozawa
    • Nathalie Picqué
    Research
    Nature Photonics
    Volume: 4, P: 55-57

  • Ultralow-noise microwave signals are generated at 12 GHz by a low-noise fibre-based frequency comb and cutting-edge photodetection techniques. The microwave signals have a fractional frequency stability below 6.5 × 10–16 at 1 s and a timing noise floor below 41 zs Hz–1/2.

    • Xiaopeng Xie
    • Romain Bouchand
    • Yann Le Coq
    Research
    Nature Photonics
    Volume: 11, P: 44-47

  • Kerr frequency combs are well suited for high-capacity data transmission with phase-sensitive modulation formats. This work demonstrates error-free transmission with data rates of up to 1.44 Tbit s−1, spectral efficiencies of up to 6 bit s−1 Hz−1 and transmission distances of up to 300 km.

    • Joerg Pfeifle
    • Victor Brasch
    • Christian Koos
    Research
    Nature Photonics
    Volume: 8, P: 375-380

  • Vectorial optoelectronic metasurfaces are described, showing that light pulses can be used to drive and direct local charge flows around symmetry-broken plasmonic nanostructures, leading to tunable responses in terahertz emission.

    • Jacob Pettine
    • Prashant Padmanabhan
    • Hou-Tong Chen
    ResearchOpen Access
    Nature
    Volume: 626, P: 984-989

  • By employing a Doppler cancellation technique, optical frequency synthesis is achieved with stability and accuracy in the 10−20 range within 100 s. An offset between two optical frequency combs phase-locked at 1,542 nm is obtained as 5.4 × 10−21 at 1,063 nm within 105 s.

    • Michele Giunta
    • Wolfgang Hänsel
    • Ronald Holzwarth
    Research
    Nature Photonics
    Volume: 14, P: 44-49

  • Using two independent laser frequency combs to calibrate an astronomical spectrometer, researchers demonstrate a stability of ~1 cm s–1, which is required for detecting low-mass rocky exoplanets around Sun-like stars.

    • Rafael A. Probst
    • Dinko Milaković
    • Ronald Holzwarth
    Research
    Nature Astronomy
    Volume: 4, P: 603-608

  • Ablation cooling is demonstrated as an effective means of removing material using successive bursts of laser pulses with short intraburst delay times; the technique allows the overall pulse energy to be decreased, overcoming negative thermal effects during the ablation process.

    • Can Kerse
    • Hamit Kalaycıoğlu
    • Fatih Ömer Ilday
    Research
    Nature
    Volume: 537, P: 84-88

  • Metrics Reloaded is a comprehensive framework for guiding researchers in the problem-aware selection of metrics for common tasks in biomedical image analysis.

    • Lena Maier-Hein
    • Annika Reinke
    • Paul F. Jäger
    Reviews
    Nature Methods
    Volume: 21, P: 195-212