Damage in a Thin Metal Film by High-Power Terahertz Radiation.
| Autor: | Agranat MB; Joint Institute for High Temperatures of the Russian Academy of Sciences (JIHT RAS), Izhorskaya 13 Building 2, Moscow 125412, Russian Federation., Chefonov OV; Joint Institute for High Temperatures of the Russian Academy of Sciences (JIHT RAS), Izhorskaya 13 Building 2, Moscow 125412, Russian Federation., Ovchinnikov AV; Joint Institute for High Temperatures of the Russian Academy of Sciences (JIHT RAS), Izhorskaya 13 Building 2, Moscow 125412, Russian Federation., Ashitkov SI; Joint Institute for High Temperatures of the Russian Academy of Sciences (JIHT RAS), Izhorskaya 13 Building 2, Moscow 125412, Russian Federation., Fortov VE; Joint Institute for High Temperatures of the Russian Academy of Sciences (JIHT RAS), Izhorskaya 13 Building 2, Moscow 125412, Russian Federation., Kondratenko PS; Nuclear Safety Institute of the Russian Academy of Sciences (NSI RAS), Bolshaya Tul'skaya Street 52, 115191 Moscow, Russian Federation. |
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| Jazyk: | angličtina |
| Zdroj: | Physical review letters [Phys Rev Lett] 2018 Feb 23; Vol. 120 (8), pp. 085704. |
| DOI: | 10.1103/PhysRevLett.120.085704 |
| Abstrakt: | We report on the experimental observation of high-power terahertz-radiation-induced damage in a thin aluminum film with a thickness less than a terahertz skin depth. Damage in a thin metal film produced by a single terahertz pulse is observed for the first time. The damage mechanism induced by a single terahertz pulse could be attributed to thermal expansion of the film causing debonding of the film from the substrate, film cracking, and ablation. The damage pattern induced by multiple terahertz pulses at fluences below the damage threshold is quite different from that observed in single-pulse experiments. The observed damage pattern resembles an array of microcracks elongated perpendicular to the in-plane field direction. A mechanism related to microcracks' generation and based on a new phenomenon of electrostriction in thin metal films is proposed. |
| Databáze: | MEDLINE |
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