Propagation analysis of space-time surface plasmon polariton wave packet excited by light irradiation on nanobeam structure

Naoki Ichiji; Murat Yessenov; Kenneth L. Schepler; Ayman F. Abouraddy; Atsushi Kubo

doi:10.1117/12.2607690

7 March 2022 Propagation analysis of space-time surface plasmon polariton wave packet excited by light irradiation on nanobeam structure

Naoki Ichiji, Murat Yessenov, Kenneth L. Schepler, Ayman F. Abouraddy, Atsushi Kubo

Author Affiliations +

Proceedings Volume 11999, Ultrafast Phenomena and Nanophotonics XXVI; 1199904 (2022) https://doi.org/10.1117/12.2607690
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We investigate space-time surface plasmon polariton (ST-SPP) wave packet, a conceptual correspondence of a surface-electromagnetic wave to the space-time wave (ST wave) that is excited on a metal surface through a light-SPP coupling at a nano-scaled ridge. In a framework of the finite-difference time-domain (FDTD) method, a pulsed excitation light was constructed by using a couple of hundred plane waves with different frequencies whose intensity and incident angle were determined to satisfy the conditions for generating ST wave according to the dispersion relation of SPP on the metal surface. The ST-SPP WP launched from the nano-ridge exhibited propagation invariance and tunability of the group velocity.

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Citation Download Citation

Naoki Ichiji, Murat Yessenov, Kenneth L. Schepler, Ayman F. Abouraddy, and Atsushi Kubo "Propagation analysis of space-time surface plasmon polariton wave packet excited by light irradiation on nanobeam structure", Proc. SPIE 11999, Ultrafast Phenomena and Nanophotonics XXVI, 1199904 (7 March 2022); https://doi.org/10.1117/12.2607690

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