Bagley, Jacob D. and Moss, Clayton D. and Sorenson, Shayne A. and Johnson, Jeremy A. (2018) Laser-induced plasma generation of terahertz radiation using three incommensurate wavelengths. Journal of Physics B: Atomic, Molecular and Optical Physics, 51 (14). Art. No. 144004. ISSN 0953-4075. https://resolver.caltech.edu/CaltechAUTHORS:20180711-150549118
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Abstract
We present the generation of THz radiation by focusing ultrafast laser pulses with three incommensurate wavelengths to form a plasma. The three colors include 800 nm and the variable IR signal and idler outputs from an optical parametric amplifier. We observe that stable THz is generated when all three colors are present, with a peak-to-peak field strength of ~200 kV cm^(−1) and a relatively broad, smooth spectrum extending out to 6 THz, without any strong dependence on the selection of signal and idler IR wavelengths (in the range from 1300 to 2000 nm). We confirm that three colors are indeed needed, and we present plasma current modeling that corroborates our observations.
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| Additional Information: | © 2018 IOP Publishing Ltd. Received 30 December 2017, revised 11 April 2018. Accepted for publication 22 May 2018. Published 21 June 2018. Special Issue on ultrafast spectroscopy: fundamentals The authors acknowledge funding and support from the Department of Chemistry and Biochemistry and the College of Physical and Mathematical Sciences at Brigham Young University. | |||||||||
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| Subject Keywords: | terahertz, terahertz generation, ultrafast spectroscopy | |||||||||
| Issue or Number: | 14 | |||||||||
| Record Number: | CaltechAUTHORS:20180711-150549118 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20180711-150549118 | |||||||||
| Official Citation: | Jacob D Bagley et al 2018 J. Phys. B: At. Mol. Opt. Phys. 51 144004 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 87772 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 11 Jul 2018 22:24 | |||||||||
| Last Modified: | 02 Jun 2020 20:08 |
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