Highly efficient broadband terahertz generation from ultrashort laser filamentation in liquids. Academic Article uri icon


  • Generation and application of energetic, broadband terahertz pulses (bandwidth ~0.1-50THz) 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.

published proceedings

  • Nat Commun

altmetric score

  • 42.05

author list (cited authors)

  • Dey, I., Jana, K., Fedorov, V. Y., Koulouklidis, A. D., Mondal, A., Shaikh, M., ... Kumar, G. R.

citation count

  • 100

complete list of authors

  • Dey, Indranuj||Jana, Kamalesh||Fedorov, Vladimir Yu||Koulouklidis, Anastasios D||Mondal, Angana||Shaikh, Moniruzzaman||Sarkar, Deep||Lad, Amit D||Tzortzakis, Stelios||Couairon, Arnaud||Kumar, G Ravindra

publication date

  • October 2017