Tracking the relaxation pathway of photo-excited electrons in 1T-TiSe2

G. Rohde; T. Rohwer; C. Sohrt; A. Stange; S. Hellmann; L.X. Yang; K. Hanff; A. Carr; M.M. Murnane; H. Kapteyn; L. Kipp; K. Rossnagel; M. Bauer

doi:10.1140/epjst/e2013-01901-5

EPJ

Tracking the relaxation pathway of photo-excited electrons in 1T-TiSe₂

G. Rohde¹^a, T. Rohwer¹, C. Sohrt¹, A. Stange¹, S. Hellmann¹, L.X. Yang¹, K. Hanff¹, A. Carr², M.M. Murnane², H. Kapteyn², L. Kipp¹, K. Rossnagel¹ and M. Bauer¹

¹ Institute of Experimental and Applied Physics, University of Kiel, 24118 Kiel, Germany
² JILA, University of Colorado and NIST, Boulder, Co 80309-0440, USA

Received: 18 March 2013
Revised: 12 May 2013
Published online: 15 July 2013

Abstract

The ultrafast dynamics of excited electrons in 1T-TiSe₂ after absorption of a 390 nm light pulse is probed by time- and angle-resolved photoemission spectroscopy using femtosecond XUV pulses. It is demonstrated that the experimental approach can provide a comprehensive view of hot carrier motion in momentum space during relaxation back to equilibrium. This capability opens a new avenue in the investigation of energy dissipation processes in solids after intense optical excitation.