Matter manipulation with extreme terahertz light: Progress in the enabling THz technology

Publication date: Available online 20 September 2019Source: Physics ReportsAuthor(s): Peter Salén, Martina Basini, Stefano Bonetti, János Hebling, Mikhail Krasilnikov, Alexey Y. Nikitin, Georgii Shamuilov, Zoltán Tibai, Vitali Zhaunerchyk, Vitaliy GoryashkoAbstractTerahertz (THz) light has proven to be a fine tool to probe and control quasi-particles and collective excitations in solids, to drive phase transitions and associated changes in material properties, and to study rotations and vibrations in molecular systems. In contrast to visible light, which usually carries excessive photon energy for collective excitations in condensed matter systems, THz light allows for direct coupling to low-energy (meV scale) excitations of interest. The development of light sources of strong-field few-cycle THz pulses in the 2000s opened the door to controlled manipulation of reactions and processes. Such THz pulses can drive new dynamic states of matter, in which materials exhibit properties entirely different from that of the equilibrium. In this review, we first systematically analyze known studies on matter manipulation with strong-field few-cycle THz light and outline some anticipated new results. We focus on how properties of materials can be manipulated by driving the dynamics of different excitations and how molecules and particles can be controlled in useful ways by extreme THz light. Around 200 studies are examined, most of which were done during the last five years. Secondly, ...

Source: Physics Reports - September 21, 2019 Category: Physics Source Type: research