Investigation of structural dynamics of substances using ultrafast electron diffraction and microscopy: (50th anniversary of the Institute of Spectroscopy, Russian Academy of Sciences). (March 2019)

• Record Type: Journal Article
• Authors: Aseyev, S A; Ryabov, E A
• Is Part Of: Physics Uspekhi. Volume 62:Number 3(2019:Mar.)
• Page Start: 289
• Page End: 293
• Publication Date: 2019-03
• Subjects: structural dynamics -- time-resolved electron diffraction and electron microscopy -- femtosecond laser radiation -- coherent optical phonons; 07.78.+s -- 61.05.J - -- 64.70.D - -- 64.70.K - -- 68.37.Og; Physics -- Periodicals; 530.05
• DOI: 10.3367/UFNe.2018.06.038393
• Languages: English
• ISSNs: 1063-7869

Abstract

Abstract: The structural dynamics of matter, induced by powerful and most often femtosecond laser pulses, is manifested in an atomic-molecular 'movie', a collection of processes, the exploration of which is of immense interest for today's natural sciences. Studying this global phenomenon requires an ultra-high spatio-temporal resolution that involves the development of dedicated research methods. Laser spectroscopy may be applied to determine energy states of samples and track their evolution in time; however, the structural dynamics of matter can only be disclosed from that information by indirect methods. We present here direct techniques for studying laser-perturbed substances in the spatio-temporal continuum where matter is probed with ultrashort electron and X-ray pulses. We also describe the first series of experiments performed with the aid of a femtosecond electron diffractometer and picosecond transmission electron microscope at the Institute of Spectroscopy of the Russian Academy of Sciences based in Troitsk, Moscow.