Nonlinear charge oscillation driven by a single-cycle light field in an organic superconductor

Y. Kawakami, T. Amano, Y. Yoneyama, Y. Akamine, H. Itoh, G. Kawaguchi, H. M. Yamamoto, H. Kishida, K. Itoh, T. Sasaki, S. Ishihara, Yasuhiro Tanaka, K. Yonemitsu, S. Iwai

Research output: Contribution to journalLetter

6 Citations (Scopus)

Abstract

Application of an intense light field to solids produces enormous and ultrafast nonlinear phenomena such as high-harmonic generation1,2 and attosecond charge dynamics3,4. These are distinct from conventional photonics. However, the main targets for investigation have been limited to insulators and semiconductors, although theoretical approaches have also been developed for correlated metals and superconductors5. Here, in a layered organic superconductor, a nonlinear charge oscillation driven by a nearly single-cycle strong electric field of >10 MV cm−1 is observed as a stimulated emission. The charge oscillation is different from a linear response and ascribed to a polar charge oscillation with a period of ∼6 fs. This nonlinear polar charge oscillation is enhanced by critical fluctuations near a superconducting transition temperature and a critical end-point of first-order Mott transitions. Its observation on an ultrafast timescale of ∼10 fs clarifies that Coulomb repulsion plays an essential role in the superconductivity of organic superconductors.

Original languageEnglish
Pages (from-to)474-478
Number of pages5
JournalNature Photonics
Volume12
Issue number8
DOIs
Publication statusPublished - 2018 Aug 1
Externally publishedYes

Fingerprint

organic superconductors
Superconducting materials
oscillations
Stimulated emission
cycles
Superconductivity
Photonics
Superconducting transition temperature
Metals
Electric fields
Semiconductor materials
stimulated emission
superconductivity
transition temperature
insulators
photonics
harmonics
electric fields
metals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Kawakami, Y., Amano, T., Yoneyama, Y., Akamine, Y., Itoh, H., Kawaguchi, G., ... Iwai, S. (2018). Nonlinear charge oscillation driven by a single-cycle light field in an organic superconductor. Nature Photonics, 12(8), 474-478. https://doi.org/10.1038/s41566-018-0194-4

Nonlinear charge oscillation driven by a single-cycle light field in an organic superconductor. / Kawakami, Y.; Amano, T.; Yoneyama, Y.; Akamine, Y.; Itoh, H.; Kawaguchi, G.; Yamamoto, H. M.; Kishida, H.; Itoh, K.; Sasaki, T.; Ishihara, S.; Tanaka, Yasuhiro; Yonemitsu, K.; Iwai, S.

In: Nature Photonics, Vol. 12, No. 8, 01.08.2018, p. 474-478.

Research output: Contribution to journalLetter

Kawakami, Y, Amano, T, Yoneyama, Y, Akamine, Y, Itoh, H, Kawaguchi, G, Yamamoto, HM, Kishida, H, Itoh, K, Sasaki, T, Ishihara, S, Tanaka, Y, Yonemitsu, K & Iwai, S 2018, 'Nonlinear charge oscillation driven by a single-cycle light field in an organic superconductor', Nature Photonics, vol. 12, no. 8, pp. 474-478. https://doi.org/10.1038/s41566-018-0194-4
Kawakami Y, Amano T, Yoneyama Y, Akamine Y, Itoh H, Kawaguchi G et al. Nonlinear charge oscillation driven by a single-cycle light field in an organic superconductor. Nature Photonics. 2018 Aug 1;12(8):474-478. https://doi.org/10.1038/s41566-018-0194-4
Kawakami, Y. ; Amano, T. ; Yoneyama, Y. ; Akamine, Y. ; Itoh, H. ; Kawaguchi, G. ; Yamamoto, H. M. ; Kishida, H. ; Itoh, K. ; Sasaki, T. ; Ishihara, S. ; Tanaka, Yasuhiro ; Yonemitsu, K. ; Iwai, S. / Nonlinear charge oscillation driven by a single-cycle light field in an organic superconductor. In: Nature Photonics. 2018 ; Vol. 12, No. 8. pp. 474-478.
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