TY - JOUR
T1 - Surface Plasmon-Mediated Nanoscale Localization of Laser-Driven sub-Terahertz Spin Dynamics in Magnetic Dielectrics
AU - Chekhov, Alexander L.
AU - Stognij, Alexander I.
AU - Satoh, Takuya
AU - Murzina, Tatiana V.
AU - Razdolski, Ilya
AU - Stupakiewicz, Andrzej
N1 - Funding Information:
The authors thank A. Melnikov, T. Kampfrath, A. Kirilyuk, and A.M. Kalashnikova for fruitful discussions, as well as M. Wolf and A. Maziewski for their continuous support. We acknowledge support from the National Science Centre Poland (Grant DEC-2017/25/B/ST3/01305), G-RISC Grant 2017a-18, JSPS KAKENHI Grant (JP26103004), and JSPS Core-to-Core Program (A. Advanced Research Networks).
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/5/9
Y1 - 2018/5/9
N2 - 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.
AB - 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.
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U2 - 10.1021/acs.nanolett.8b00416
DO - 10.1021/acs.nanolett.8b00416
M3 - Article
C2 - 29641902
AN - SCOPUS:85046675157
VL - 18
SP - 2970
EP - 2975
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 5
ER -