caa a22 4500 445372222 CHVBK 20180317142951.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00340-011-4377-7 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4377-7 Bi-directional terahertz emission from gold-coated nanogratings by excitation via femtosecond laser pulses [Elektronische Daten] [F. Garwe, A. Schmidt, G. Zieger, T. May, K. Wynne, U. Hübner, M. Zeisberger, W. Paa, H. Stafast, H.-G. Meyer] We report on the investigation of terahertz (THz) emission from gold-coated nanogratings (500 nm grating constant) upon femtosecond laser irradiation (785nm, 150fs, 1kHz, ≤1mJ/pulse). Unlike common assumptions, THz emission is not only observed in case of rear side irradiation (through substrate (Welsh et al. in Phys. Rev. Lett. 98:026803, 2007; Welsh and Wynne in Opt. Express 17:2470-2480, 2009)) of the nanograting, but also in case of front side excitation (through air). Furthermore in both cases, THz emission propagates in the direction of laser beam propagation and reverse. Based on these findings, we suggest a new approach to describe the newly observed phenomena. Using a highly sensitive and fast superconducting transition edge sensor (TES) as calorimeter, it was possible to directly measure the absolute energy of the emitted THz pulses in a defined spectral and spatial range, enabling for the first time a quantitative analysis of the THz emission process. Springer-Verlag, 2011 Garwe F. Institute of Photonic Technology, 07745, Jena, Germany aut Schmidt A. Institute of Photonic Technology, 07745, Jena, Germany aut Zieger G. Institute of Photonic Technology, 07745, Jena, Germany aut May T. Institute of Photonic Technology, 07745, Jena, Germany aut Wynne K. Department of Physics, SUPA, University of Strathclyde, G4 0NG, Glasgow, Scotland, UK aut Hübner U. Institute of Photonic Technology, 07745, Jena, Germany aut Zeisberger M. Institute of Photonic Technology, 07745, Jena, Germany aut Paa W. Institute of Photonic Technology, 07745, Jena, Germany aut Stafast H. Institute of Photonic Technology, 07745, Jena, Germany aut Meyer H.-G Institute of Photonic Technology, 07745, Jena, Germany aut Applied Physics B Springer-Verlag 102/3(2011-03-01), 551-554 0946-2171 102:3<551 2011 102 340 https://doi.org/10.1007/s00340-011-4377-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4377-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Garwe F. Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 700 1- Schmidt A. Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 700 1- Zieger G. Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 700 1- May T. Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 700 1- Wynne K. Department of Physics, SUPA, University of Strathclyde, G4 0NG, Glasgow, Scotland, UK aut NATIONALLICENCE 700 1- Hübner U. Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 700 1- Zeisberger M. Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 700 1- Paa W. Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 700 1- Stafast H. Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 700 1- Meyer H.-G Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 102/3(2011-03-01), 551-554 0946-2171 102:3<551 2011 102 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer