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Highly efficient broadband terahertz generation from ultrashort laser filamentation in liquids

Author

Listed:
  • Indranuj Dey

    (Tata Institute of Fundamental Research)

  • Kamalesh Jana

    (Tata Institute of Fundamental Research)

  • Vladimir Yu. Fedorov

    (Texas A&M University at Qatar
    P. N. Lebedev Physical Institute of the Russian Academy of Sciences)

  • Anastasios D. Koulouklidis

    (Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas)

  • Angana Mondal

    (Tata Institute of Fundamental Research)

  • Moniruzzaman Shaikh

    (Tata Institute of Fundamental Research)

  • Deep Sarkar

    (Tata Institute of Fundamental Research)

  • Amit D. Lad

    (Tata Institute of Fundamental Research)

  • Stelios Tzortzakis

    (Texas A&M University at Qatar
    Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas
    University of Crete)

  • Arnaud Couairon

    (Centre de Physique Théorique, École Polytechnique, CNRS)

  • G. Ravindra Kumar

    (Tata Institute of Fundamental Research)

Abstract

Generation and application of energetic, broadband terahertz pulses (bandwidth ~0.1–50 THz) is an active and contemporary area of research. The main thrust is toward the development of efficient sources with minimum complexities—a true table-top setup. In this work, we demonstrate the generation of terahertz radiation via ultrashort pulse induced filamentation in liquids—a counterintuitive observation due to their large absorption coefficient in the terahertz regime. The generated terahertz energy is more than an order of magnitude higher than that obtained from the two-color filamentation of air (the most standard table-top technique). Such high terahertz energies would generate electric fields of the order of MV cm-1, which opens the doors for various nonlinear terahertz spectroscopic applications. The counterintuitive phenomenon has been explained via the solution of nonlinear pulse propagation equation in the liquid medium.

Suggested Citation

  • Indranuj Dey & Kamalesh Jana & Vladimir Yu. Fedorov & Anastasios D. Koulouklidis & Angana Mondal & Moniruzzaman Shaikh & Deep Sarkar & Amit D. Lad & Stelios Tzortzakis & Arnaud Couairon & G. Ravindra , 2017. "Highly efficient broadband terahertz generation from ultrashort laser filamentation in liquids," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01382-x
    DOI: 10.1038/s41467-017-01382-x
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