2020/04/16 by Ivan Iorsh, Iorsh, Ivan, Gulnaz Rakhmanova +1
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Quantum optics and atomic interactions #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.2004.07502
openalex publication_date 2020/04/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show that the second harmonic generation (SHG) is enhanced in the chiral\none-dimensional electron currents in a broad frequency range. The origin of the\nenhancement is two-fold: first, the linear dispersion of the current and the\nassociated plasmonic mode as well as the quasi-linear dispersion of\nplasmon-polariton result in the lift of the phase matching condition. Moreover,\nthe strong field localization leads to the further increase of the SHG in the\nstructure. The results suggest that the chiral currents localized at the domain\nwalls of magnetic topological insulators can be an efficient source of second\nharmonic signal in the terahertz frequency range.\n