Seminars Archive

Table-top high-brightness ultrashort light sources tuneable across the deep and vacuum ultraviolet

Abstract
I will present a novel generation of light sources based on gas-filled stretched hollow-fibers providing: ultrashort coherent light pulses tuneable across the deep and vacuum UV (110-500 nm) with high peak-brightness, optical sub-femtosecond pulses in different spectral regions [1]. The future development of these light sources towards high-average and high-peak powers, the rich nonlinear optics and physical “playground” involved [1,2], together with current and future applications will be presented, with a special focus on advanced time-resolved spectroscopies [3,4]. References: [1] J.C. Travers, T.F. Grigorova, C. Brahms and F. Belli, High-energy pulse self-compression and ultraviolet generation through soliton dynamics in hollow capillary fibres, Nature Photonics, 16 (2019) DOI: 10.1038/s41566-019-0416-4. (in press) [2] F. Belli, A. Abdolvand, W. Chang, J.C. Travers and P. St.J. Russell, Vacuum-ultraviolet to infrared supercontinuum in hydrogen-filled photonic crystal fiber, Optica 2, pp. 292-300 (2015) [3] N. Kotsina, F. Belli, S. Gao, Y. Wang, P. Wang, J. C. Travers, D. Townsend, Ultrafast Molecular Spectroscopy Using a Hollow-Core Photonic Crystal Fibre Light Source, Journal of physical chemistry letters 10, 4, 715-720 (2019) [4] H. Bromberg, A. Ermolov, F. Belli et al., Angle-resolved photoemission spectroscopy with 9-eV photon- energy pulses generated in a gas-filled hollow-core photonic crystal fiber , Applied Physics Letters 107 (9), 091101 (2015)