Liao, Guoqian, Li, Yutong, Liu, Hao et al. (16 more authors) (2019) Multimillijoule coherent terahertz bursts from picosecond laser-irradiated metal foils. Proceedings of the National Academy of Sciences of the United States of America. pp. 3994-3999. ISSN 1091-6490
Abstract
Ultrahigh-power terahertz (THz) radiation sources are essential for many applications, for example, THz-wave-based compact accelerators and THz control over matter. However, to date none of the THz sources reported, whether based upon large-scale accelerators or high-power lasers, have produced THz pulses with energies above the millijoule (mJ) level. Here, we report a substantial increase in THz pulse energy, as high as tens of mJ, generated by a high-intensity, picosecond laser pulse irradiating a metal foil. A further up-scaling of THz energy by a factor of ∼4 is observed when introducing preplasmas at the target-rear side. Experimental measurements and theoretical models identify the dominant THz generation mechanism to be coherent transition radiation, induced by the laser-accelerated energetic electron bunch escaping the target. Observation of THz-field-induced carrier multiplication in high-resistivity silicon is presented as a proof-of-concept application demonstration. Such an extremely high THz energy not only triggers various nonlinear dynamics in matter, but also opens up the research era of relativistic THz optics.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Copyright © 2019 the Author(s). Published by PNAS. |
Keywords: | Coherent transition,Extreme terahertz science,Laser–plasma interaction,Radiation,Terahertz radiation |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Computer Science (York) The University of York > Faculty of Sciences (York) > Biology (York) The University of York > Faculty of Arts and Humanities (York) > Archaeology (York) The University of York > Faculty of Social Sciences (York) > The York Management School The University of York > Faculty of Sciences (York) > Electronic Engineering (York) The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 19 Mar 2019 15:50 |
Last Modified: | 16 Oct 2024 15:34 |
Published Version: | https://doi.org/10.1073/pnas.1815256116 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1073/pnas.1815256116 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:143863 |