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Updated: Mar 28, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Universality of Plasmon Excitations in Dirac Semimetals
Dmitri E Kharzeev1,2, Robert D Pisarski2,3, Ho-Ung Yee3,4
1Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA.
Abstract:
We investigate the properties of the collective plasmon excitations in Dirac semimetals by using the methods of relativistic field theory. We find a strong and narrow plasmon excitation whose frequency is in the terahertz (THz) range which may be important for practical applications. The properties of the plasmon appear universal for all Dirac semimetals, due to the large degeneracy of the quasiparticles and the small Fermi velocity, v_{F}≪c. This universality is closely analogous to the phenomenon of "dimensional transmutation" that is responsible for the emergence of dimensionful scales in relativistic field theories such as quantum chromodynamics.
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