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Cited by 388

The DOI matches its Crossref record; 31 of the 31 references it cites were found in a registry or an index.

Selective scattering between Floquet–Bloch and Volkov states in a topological insulator

Open access
Mahmood, Fahad, Chan, Ching-Kit, Alpichshev, Zhanybek, Gardner, Dillon, Lee, Young, Lee, Patrick A., Gedik, Nuh·2016·Nature Physics

Abstract

Time- and angle-resolved photoelectron spectroscopy experiments are used to monitor the transition between Floquet–Bloch and Volkov states in the topological insulator Bi2Se3. The coherent optical manipulation of solids is emerging as a promising way to engineer novel quantum states of matter1,2,3,4,5. The strong time-periodic potential of intense laser light can be used to generate hybrid photon–electron states. Interaction of light with Bloch states leads to Floquet–Bloch states, which are essential in realizing new photo-induced quantum phases6,7,8. Similarly, dressing of free-electron states near the surface of a solid generates Volkov states, which are used to study nonlinear optics in atoms and semiconductors9. The interaction of these two dynamic states with each other remains an open experimental problem. Here we use time- and angle-resolved photoemission spectroscopy (Tr-ARPES) to selectively study the transition between these two states on the surface of the topological insulator Bi2Se3. We find that the coupling between the two strongly depends on the electron momentum, providing a route to enhance or inhibit it. Moreover, by controlling the light polarization we can negate Volkov states to generate pure Floquet–Bloch states. This work establishes a systematic path for the coherent manipulation of solids via light–matter interaction.

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Metadata

Authors
Mahmood, F., Chan, C.-K., Alpichshev, Z., Gardner, D., Lee, Y., Lee, P. A., & Gedik, N.
Venue
Nature Physics
Published
2016-01-04
Volume
12
Issue
4
Pages
306-310
ISSN
  • 1745-2473 (ISSN-L)
  • 1745-2481
OpenAlex
W2214636898
Cited by
388
References
31
FWCI
15.08
Type
journal article
Language
en
Open access
bronze

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