Multiphoton excitation and high-harmonics generation in topological insulator. (13th April 2018)

• Record Type: Journal Article
• Authors: Avetissian, H K; Avetissian, A K; Avchyan, B R; Mkrtchian, G F
• Is Part Of: Journal of physics. Volume 30:Number 18(2018)
• Publication Date: 2018-04-13
• Subjects: strong-field -- topological insulator -- high-harmonics -- multiphoton -- Hartree–Fock approximation; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aab989
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Multiphoton interaction of coherent electromagnetic radiation with 2D metallic carriers confined on the surface of the 3D topological insulator is considered. A microscopic theory describing the nonlinear interaction of a strong wave and metallic carriers with many-body Coulomb interaction is developed. The set of integrodifferential equations for the interband polarization and carrier occupation distribution is solved numerically. Multiphoton excitation of Fermi–Dirac sea of 2D massless carriers is considered for a THz pump wave. It is shown that in the moderately strong pump wave field along with multiphoton interband/intraband transitions the intense radiation of high harmonics takes place.