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Proceedings Paper

Subcycle time-resolved study for efficient terahertz high harmonic generation in Dirac semimetal Cd3As2 (Conference Presentation)
Author(s): Natsuki Kanda; Bing Cheng; Tatsuhiko N. Ikeda; Takuya Matsuda; Peiyu Xia; Timo Schumann; Susanne Stemmer; Jiro Itatani; N. Peter Armitage; Ryusuke Matsunaga

Paper Abstract

High harmonic generation in solids attracted great attentions as a new scheme for frequency conversion. We report observation of an extremely efficient terahertz (THz) third- and fifth-harmonic generation in thin films of Cd3As2, a three-dimensional Dirac semimetal with massless electron dispersion, as it is observable with tabletop THz source at room temperature. Our THz pump-THz probe study with subcycle time resolution elucidates that the intraband current of coherently accelerated Dirac electrons is the main source of the THz harmonics as expected theoretically. The results pave the way toward novel devices for ultrafast THz electronics and photonics based on topological semimetals.

Paper Details

Date Published: 10 March 2020
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Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112780J (10 March 2020);
Show Author Affiliations
Natsuki Kanda, Institute for Solid State Physics, The Univ. of Tokyo (Japan)
Bing Cheng, Johns Hopkins Univ. (United States)
Tatsuhiko N. Ikeda, The Institute for Solid State Physics, The Univ. of Tokyo (Japan)
Takuya Matsuda, The Institute for Solid State Physics, The Univ. of Tokyo (Japan)
Peiyu Xia, The Institute for Solid State Physics, The Univ. of Tokyo (Japan)
Timo Schumann, Univ. of California, Santa Barbara (United States)
Susanne Stemmer, Univ. of California, Santa Barbara (United States)
Jiro Itatani, The Institute for Solid State Physics, The Univ. of Tokyo (Japan)
N. Peter Armitage, The Institute for Quantum Matter, Johns Hopkins Univ. (United States)
Ryusuke Matsunaga, The Institute for Solid State Physics, The Univ. of Tokyo (Japan)
PRESTO, Japan Science and Technology Agency (Japan)


Published in SPIE Proceedings Vol. 11278:
Ultrafast Phenomena and Nanophotonics XXIV
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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