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Polarization resolved light splitting of single plasmonic nanowire emission
Author(s): Longkun Yang; Pan Li; Zhipeng Li
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Paper Abstract

Crystalline metallic nanowires have been indispensable “building-blocks” to construct functional elements for future integrated nano-photonic devices and circuits. In this work, by the polarization measurements, we reveal that the propagating surface plasmons emission from a thick nanowire (D ~ 300 nm) are split into two parts: I1 and I2, with the polarizations nearly perpendicular to the respective emitting facets. By changing excitation polarization, splitting ratio (I1/I2) can be further tuned. The light splitting mechanism in this single thick nanowire is due to the interference of propagating surface plasmons modes along the nanowire, which modulates field distribution at the end facets. These findings demonstrate that single thick silver nanowire with well-defined end facets can naturally provide multiple outcoupling channels and function as a simple nanoscale polarization beam splitter. This work sheds a new light on our understanding about surface plasmons propagation and emission, and would certainly benefit the development of waveguides design and integrated plasmonic devices.

Paper Details

Date Published: 18 December 2019
PDF: 6 pages
Proc. SPIE 11336, AOPC 2019: Nanophotonics, 113360C (18 December 2019); doi: 10.1117/12.2544180
Show Author Affiliations
Longkun Yang, Capital Normal Univ. (China)
Pan Li, Capital Normal Univ. (China)
Zhipeng Li, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 11336:
AOPC 2019: Nanophotonics
Zhiping Zhou; Xiao-Cong Yuan; Daoxin Dai, Editor(s)

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