---
OA_place: repository
OA_type: green
_id: '389'
abstract:
- lang: eng
  text: The coherent optical manipulation of solids is emerging as a promising way
    to engineer novel quantum states of matter. 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 phases. 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 semiconductors. 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.
acknowledgement: The authors would like to thank C. Lee for useful discussions. This
  work is supported by US Department of Energy (DOE), Basic Energy Sciences, Division
  of Materials Sciences and Engineering (experimental set-up, data acquisition and
  theory), Army Research Office (electron spectrometer) and by the Gordon and Betty
  Moore Foundation’s EPiQS Initiative through Grant GBMF4540 (data analysis).
article_processing_charge: No
article_type: letter_note
arxiv: 1
author:
- first_name: Fahad
  full_name: Mahmood, Fahad
  last_name: Mahmood
- first_name: Ching
  full_name: Chan, Ching
  last_name: Chan
- first_name: Zhanybek
  full_name: Alpichshev, Zhanybek
  id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
  last_name: Alpichshev
  orcid: 0000-0002-7183-5203
- first_name: Dillon
  full_name: Gardner, Dillon
  last_name: Gardner
- first_name: Young
  full_name: Lee, Young
  last_name: Lee
- first_name: Patrick
  full_name: Lee, Patrick
  last_name: Lee
- first_name: Nuh
  full_name: Gedik, Nuh
  last_name: Gedik
citation:
  ama: Mahmood F, Chan C, Alpichshev Z, et al. Selective scattering between Floquet
    Bloch and Volkov states in a topological insulator. <i>Nature Physics</i>. 2016;12:306-310.
    doi:<a href="https://doi.org/10.1038/nphys3609">10.1038/nphys3609</a>
  apa: Mahmood, F., Chan, C., Alpichshev, Z., Gardner, D., Lee, Y., Lee, P., &#38;
    Gedik, N. (2016). Selective scattering between Floquet Bloch and Volkov states
    in a topological insulator. <i>Nature Physics</i>. Springer nature. <a href="https://doi.org/10.1038/nphys3609">https://doi.org/10.1038/nphys3609</a>
  chicago: Mahmood, Fahad, Ching Chan, Zhanybek Alpichshev, Dillon Gardner, Young
    Lee, Patrick Lee, and Nuh Gedik. “Selective Scattering between Floquet Bloch and
    Volkov States in a Topological Insulator.” <i>Nature Physics</i>. Springer nature,
    2016. <a href="https://doi.org/10.1038/nphys3609">https://doi.org/10.1038/nphys3609</a>.
  ieee: F. Mahmood <i>et al.</i>, “Selective scattering between Floquet Bloch and
    Volkov states in a topological insulator,” <i>Nature Physics</i>, vol. 12. Springer
    nature, pp. 306–310, 2016.
  ista: Mahmood F, Chan C, Alpichshev Z, Gardner D, Lee Y, Lee P, Gedik N. 2016. Selective
    scattering between Floquet Bloch and Volkov states in a topological insulator.
    Nature Physics. 12, 306–310.
  mla: Mahmood, Fahad, et al. “Selective Scattering between Floquet Bloch and Volkov
    States in a Topological Insulator.” <i>Nature Physics</i>, vol. 12, Springer nature,
    2016, pp. 306–10, doi:<a href="https://doi.org/10.1038/nphys3609">10.1038/nphys3609</a>.
  short: F. Mahmood, C. Chan, Z. Alpichshev, D. Gardner, Y. Lee, P. Lee, N. Gedik,
    Nature Physics 12 (2016) 306–310.
date_created: 2018-12-11T11:46:11Z
date_published: 2016-04-01T00:00:00Z
date_updated: 2026-05-12T12:47:08Z
day: '01'
doi: 10.1038/nphys3609
extern: '1'
external_id:
  arxiv:
  - '1512.05714'
intvolume: '        12'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1512.05714
month: '04'
oa: 1
oa_version: Preprint
page: 306 - 310
publication: Nature Physics
publication_identifier:
  eissn:
  - 1745-2481
  issn:
  - ' 1745-2473'
publication_status: published
publisher: Springer nature
publist_id: '7440'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Selective scattering between Floquet Bloch and Volkov states in a topological
  insulator
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 12
year: '2016'
...