Title :
Quantum interference control of photocurrents in topological insulator films
Author :
Bas, D.A. ; Vargas-Valez, K. ; Babakiray, S. ; Johnson, T.A. ; Ledereman, D. ; Stanescu, T.D. ; Bristow, A.D.
Author_Institution :
Dept. of Phys. & Astron., West Virginia Univ., Morgantown, WV, USA
Abstract :
Charge currents in thin films of Bi2Se3 are controlled using a two-color scheme that exploits quantum interference of single- and two-photon absorption pathways. Injection and shift currents are observed and linked to surface state excitations.
Keywords :
bismuth compounds; optical films; photoconductivity; quantum interference phenomena; quantum optics; topological insulators; two-photon processes; Bi2Se3; charge currents; injection currents; photocurrents; quantum interference control; shift currents; single-photon absorption pathways; surface state excitations; topological insulator films; two-color scheme; two-photon absorption pathways; Films; Nonlinear optics; Optical polarization; Optical surface waves; Photoconductivity; Surface waves; Topological insulators;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
