Terahertz optics

Terahertz optics is a branch of optics and photonics that studies electromagnetic radiation with a wavelength between 0.1 and 1 millimetre, so-called because this corresponds to a frequency of approximately one terahertz (a trillion hertz). Terahertz radiation is relevant for applications in security screening,

Latest Research and Reviews

  • Research
    | Open Access

    The evidence of topological origin for the recently observed anomalous Hall effect remains elusive. Here, the authors report that the resonance of the optical Hall conductivity resulted from topological electronic structure gives rise to the large intrinsic anomalous Hall effect in the magnetic Weyl semimetal Co3Sn2S2.

    • Y. Okamura
    • , S. Minami
    • , Y. Kato
    • , Y. Fujishiro
    • , Y. Kaneko
    • , J. Ikeda
    • , J. Muramoto
    • , R. Kaneko
    • , K. Ueda
    • , V. Kocsis
    • , N. Kanazawa
    • , Y. Taguchi
    • , T. Koretsune
    • , K. Fujiwara
    • , A. Tsukazaki
    • , R. Arita
    • , Y. Tokura
    •  & Y. Takahashi
  • Research
    | Open Access

    Multicycle pulsed Terahertz radiation has appealing applications in medicine, applications in medicine, biology, material science, and could power emerging laser-based table-top accelerators and diagnostics. However a simple way to generate such pulses with high energy is not straightforward. The authors report on generation of high-peak-intensity THz pulses using a Lithium-Niobate wafer-chain and achieving a 35 megawatt in peak intensity.

    • François Lemery
    • , Thomas Vinatier
    • , Frank Mayet
    • , Ralph Aßmann
    • , Elsa Baynard
    • , Julien Demailly
    • , Ulrich Dorda
    • , Bruno Lucas
    • , Alok-Kumar Pandey
    •  & Moana Pittman
  • Research
    | Open Access

    Structures that can enhance the capabilities of quantum cascade lasers are highly sought after to improve their practicality for a range of applications. Here the authors demonstrate such a structure in a saturable absorber that takes advantage of intersubband polaritons in the terahertz range and study coherent nonlinear dynamics in the system.

    • Jürgen Raab
    • , Francesco P. Mezzapesa
    • , Leonardo Viti
    • , Nils Dessmann
    • , Laura K. Diebel
    • , Lianhe Li
    • , A. Giles Davies
    • , Edmund H. Linfield
    • , Christoph Lange
    • , Rupert Huber
    •  & Miriam S. Vitiello
  • Research
    | Open Access

    External stimuli can induce significant changes in the magnetisation of a material; however, these changes can occur very rapidly, making measurements difficult. Herein the authors demonstrate a method of ultrafast magnetometry, enabling the detection of the rapid magnetization changes.

    • Wentao Zhang
    • , Pablo Maldonado
    • , Zuanming Jin
    • , Tom S. Seifert
    • , Jacek Arabski
    • , Guy Schmerber
    • , Eric Beaurepaire
    • , Mischa Bonn
    • , Tobias Kampfrath
    • , Peter M. Oppeneer
    •  & Dmitry Turchinovich

News and Comment