2015/05/31 by Tiago A. Morgado, David E. Fernandes, Mário G. Silveirinha · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Charged particle #Cherenkov radiation #Computational physics #Dispersion (optics) #Eigenfunction #Electromagnetic radiation #Formalism (music) #Ion #Metamaterials and Metasurfaces Applications #Optics #Physics #Quantum mechanics #Radiation #Stopping power #Terahertz technology and applications #Thermal Radiation and Cooling Technologies #cond-mat.mes-hall
paper · pdf · doi:10.3390/photonics2020702
This article was published in Photonics 2015, 2(2), 702-718
openalex publication_date 2015/06/19 · arxiv created 2015/11/26 · arxiv updated 2015/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We derive closed analytical formulae for the power emitted by moving charged particles in a uniaxial wire medium by means of an eigenfunction expansion. Our analytical expressions demonstrate that, in the absence of material dispersion, the stopping power of the uniaxial wire medium is proportional to the charge velocity, and that there is no velocity threshold for the Cherenkov emission. It is shown that the eigenfunction expansion formalism can be extended to the case of dispersive lossless media. Furthermore, in the presence of material dispersion, the optimal charge velocity that maximizes the emitted Cherenkov power may be less than the speed of light in a vacuum.