Fundamentally fastest optical processes at the surface of a topological insulator

Abstract

We predict that a single oscillation of a strong optical pulse can significantly populate the surface conduction band of a three-dimensional topological insulator, Bi2Se3. Both linearly- and circularly-polarized pulses generate chiral textures of interference fringes of population in the surface Brillouin zone. These fringes constitute a self-referenced electron hologram carrying information on the topology of the surface Bloch bands, in particular, on the effect of the warping term of the low-energy Hamiltonian. These electron-interference phenomena are in a sharp contrast to graphene where there are no chiral textures for a linearly-polarized pulse and no interference fringes for circularly-polarized pulse. These predicted reciprocal space electron-population textures can be measured experimentally by time resolved angle resolved photoelectron spectroscopy (TR-ARPES) to gain direct access to non-Abelian Berry curvature at topological insulator surfaces.

arXiv comment10 pages, 10 figures

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Cited by in corpus (8)

• All-optical probe of three-dimensional topological insulators based on high-harmonic generation by circularly-polarized laser fields
• Strong-field physics in three-dimensional topological insulators
• Topological resonance and single-optical-cycle valley polarization in gapped graphene
• Theory for all-optical responses in topological materials: the velocity gauge picture
• Non-Markovian pure dephasing in a dielectric excited by a few-cycle laser pulse
• Femtosecond currents in transition metal dichalcogenides monolayers
• Laser pulse waveform control of Dirac fermions in graphene
• Ultrafast strong-field absorption in gapped graphene