Reviews & Analysis

Filter by:

  • Photonics offers high hopes for next-generation neural network processors. Now it has been shown that even entirely using off-the-shelf photonics allows surpassing speed and energy efficiency of cutting-edge GPUs.

    • Daniel Brunner
    • Demetri Psaltis
    News & Views
  • Progress in the field of quantum-photonics applications of metasurfaces is reviewed. Cutting-edge research, including the development of optical chips supporting high-dimensional quantum entanglement and advanced quantum tomography, is summarized.

    • Alexander S. Solntsev
    • Girish S. Agarwal
    • Yuri Yuri Kivshar
  • Optical acoustic sensors have gained interest for use in photoacoustic imaging systems, but can they dethrone conventional piezoelectric sensors altogether?

    • David C. Garrett
    • Lihong V. Wang
    News & Views
  • Four-wave mixing near atomic resonances offers new opportunities for spectral control of extreme ultraviolet pulses.

    • John E. Beetar
    • Michael Chini
    News & Views
  • Recent effort in controlling the structure of light in all its degrees of freedom and dimensions has pushed the limits of structured light and broadened its potential beyond orbital angular momentum, two-dimensional fields, qubits and biphotons, and linear optical manipulation.

    • Andrew Forbes
    • Michael de Oliveira
    • Mark R. Dennis
    Review Article
  • Laser-like radiation with a very large spectral coverage is obtained with a comb-like spectrum by concatenating nonlinear processes. Such a light source is extremely useful for detecting molecular trace gases.

    • Akira Ozawa
    • Thomas Udem
    News & Views
  • More atoms can not only absorb more light but, if prepared in a particular quantum state, can also do so faster than single atoms. Now, researchers have experimentally demonstrated this time-reversed process of superradiance.

    • Matthias Zens
    • Stefan Rotter
    News & Views
  • A new paradigm is emerging in which molecular properties are controlled by modifying the local electromagnetic environment, rather than the traditional approach of changing their composition or structure. Now, a tool to investigate such effects has been demonstrated that should accelerate progress in this exciting field.

    • Bill Barnes
    News & Views
  • Two independent studies employing the same narrowband deep-blue emitter, ν-DABNA, but different energy transfer schemes, achieve efficient and stable deep-blue electroluminescence.

    • Dongdong Zhang
    • Lian Duan
    News & Views
  • A network of quantum sensors for estimating phase shifts is shown to operate with superior sensitivity when delocalized highly entangled states are employed.

    • Luca Pezzè
    News & Views
  • A method to quantitatively map transient electromagnetic waveforms with atomic-spatial resolution is now possible using lightwave-driven scanning tunnelling microscopy featuring a single-molecule switch.

    • Jun Takeda
    • Ikufumi Katayama
    News & Views
  • Electromagnetic fields in light waves are mainly transverse to propagation direction but actually also have longitudinal components, which may give rise to unexpected optical phenomena involving the angular momentum of light, such as transverse spin and optical torques.

    • Filippo Cardano
    • Lorenzo Marrucci
    News & Views
  • Scintillators used in X-ray detectors typically require the use of heavy metal atoms to efficiently harvest ionizing radiation. Now the use of halogens is shown to yield efficient, metal-free organic scintillators.

    • Jia-Kai Chen
    • Naoto Shirahata
    • Hong-Tao Sun
    News & Views
  • The journey to realize a terahertz quantum cascade laser that operates at room temperature has taken a jump forward with news of a device that operates at –23 °C, within the reach of Peltier coolers.

    • Carlo Sirtori
    News & Views
  • Two independent reports of directly modulated lasers with bandwidths of >60 GHz may help bring data rates beyond 200 Gb s–1 to low-cost optical communication systems. Key to the successes has been managing photonic feedback effects within the laser cavities.

    • Ute Troppenz
    • Jochen Kreissl
    News & Views
  • The first demonstration of an optical parametric oscillator using a photonic crystal microcavity is promising for the future development of on-chip light sources for applications in integrated quantum optics.

    • Eiichi Kuramochi
    News & Views
  • The potential of machine-learning application to the field of ultrafast photonics is reviewed, with key examples including pulsed lasers, and control and characterization of ultrafast propagation dynamics.

    • Goëry Genty
    • Lauri Salmela
    • Sergei K. Turitsyn
    Review Article
  • The manipulation of the quantum properties of light involves its technically challenging strong interaction with matter. Now, an experiment shows that when light propagates through a waveguide it only takes a weakly coupled line of atoms to single out its photons, or bunch them together, unveiling and controlling its quantum nature.

    • Pablo Solano
    News & Views