Surface Plasmon-Mediated Nanoscale Localization of Laser-Driven sub-Terahertz Spin Dynamics in Magnetic Dielectrics

Alexander L. Chekhov, Alexander I. Stognij, Takuya Satoh, Tatiana V. Murzina, Ilya Razdolski, Andrzej Stupakiewicz

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We report spatial localization of the effective magnetic field generated via the inverse Faraday effect employing surface plasmon polaritons (SPPs) at Au/garnet interface. Analyzing both numerically and analytically the electric field of the SPPs at this interface, we corroborate our study with a proof-of-concept experiment showing efficient SPP-driven excitation of coherent spin precession with 0.41 THz frequency. We argue that the subdiffractional confinement of the SPP electric field enables strong spatial localization of the SPP-mediated excitation of spin dynamics. We demonstrate two orders of magnitude enhancement of the excitation efficiency at the surface plasmon resonance within a 100 nm layer of a dielectric garnet. Our findings broaden the horizons of ultrafast spin-plasmonics and open pathways toward nonthermal opto-magnetic recording on the nanoscale.

Original languageEnglish
Pages (from-to)2970-2975
Number of pages6
JournalNano Letters
Volume18
Issue number5
DOIs
Publication statusPublished - May 9 2018

Fingerprint

Spin dynamics
spin dynamics
polaritons
Lasers
lasers
Garnets
garnets
Electric fields
excitation
Faraday effect
electric fields
Magnetic recording
Surface plasmon resonance
magnetic recording
precession
surface plasmon resonance
horizon
Magnetic fields
augmentation
magnetic fields

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Chekhov, A. L., Stognij, A. I., Satoh, T., Murzina, T. V., Razdolski, I., & Stupakiewicz, A. (2018). Surface Plasmon-Mediated Nanoscale Localization of Laser-Driven sub-Terahertz Spin Dynamics in Magnetic Dielectrics. Nano Letters, 18(5), 2970-2975. https://doi.org/10.1021/acs.nanolett.8b00416

Surface Plasmon-Mediated Nanoscale Localization of Laser-Driven sub-Terahertz Spin Dynamics in Magnetic Dielectrics. / Chekhov, Alexander L.; Stognij, Alexander I.; Satoh, Takuya; Murzina, Tatiana V.; Razdolski, Ilya; Stupakiewicz, Andrzej.

In: Nano Letters, Vol. 18, No. 5, 09.05.2018, p. 2970-2975.

Research output: Contribution to journalArticle

Chekhov, AL, Stognij, AI, Satoh, T, Murzina, TV, Razdolski, I & Stupakiewicz, A 2018, 'Surface Plasmon-Mediated Nanoscale Localization of Laser-Driven sub-Terahertz Spin Dynamics in Magnetic Dielectrics', Nano Letters, vol. 18, no. 5, pp. 2970-2975. https://doi.org/10.1021/acs.nanolett.8b00416
Chekhov, Alexander L. ; Stognij, Alexander I. ; Satoh, Takuya ; Murzina, Tatiana V. ; Razdolski, Ilya ; Stupakiewicz, Andrzej. / Surface Plasmon-Mediated Nanoscale Localization of Laser-Driven sub-Terahertz Spin Dynamics in Magnetic Dielectrics. In: Nano Letters. 2018 ; Vol. 18, No. 5. pp. 2970-2975.
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