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Title: Weyl semimetals in ultrafast laser fields

Journal Article · · Physical Review. B
 [1];  [1];  [1];  [1]
  1. Georgia State Univ., Atlanta, GA (United States)
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We study theoretically the interaction of topological Weyl semimetals with an ultrafast optical pulse. The electron dynamics in such material is coherent and highly anisotropic. For some directions of pulse polarization, the electric dynamics is irreversible, which means that the residual electron conduction-band population after the pulse is comparable to the maximum conduction-band population during the pulse. For other directions of polarization, the electron dynamics is highly reversible and, after the pulse, the electron system returns to its initial state with almost zero conduction-band population. Such high anisotropy in electron dynamics is related to anisotropy in interband dipole matrix elements. In the reciprocal space, the electron conduction-band population density shows hot spots near the Weyl points. The optical pulse also causes net charge transfer through the system. The direction of transfer is the same as the direction of the field maximum. The transferred charge has highly anisotropic dependence on polarization direction with almost zero transferred charge for some directions.

Research Organization:
Georgia State Univ., Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-01ER15213; SC0007043; FG02-11ER46789
OSTI ID:
1609354
Alternate ID(s):
OSTI ID: 1546239
Journal Information:
Physical Review. B, Vol. 99, Issue 24; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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  • Wismer, Michael S.; Stockman, Mark I.; Yakovlev, Vladislav S.
  • 2017 Conference on Lasers and Electro-Optics Europe (CLEO/Europe) & European Quantum Electronics Conference (EQEC), 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) https://doi.org/10.1109/cleoe-eqec.2017.8086786
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Cited By (2)

Topological resonance and single-optical-cycle valley polarization in gapped graphene text January 2019
Lasing with Topological Weyl Semimetal text January 2019

Figures / Tables (16)

FIG. 1(p. 3)figure FIG. 1
FIG. 2(p. 5)figure FIG. 2
FIG. 3(p. 5)figure FIG. 3
FIG. 4(p. 5)figure FIG. 4
TABLE I(p. 5)table TABLE I
FIG. 5(p. 6)figure FIG. 5
FIG. 6(p. 6)figure FIG. 6
FIG. 7(p. 6)figure FIG. 7
FIG. 8(p. 7)figure FIG. 8
FIG. 9(p. 7)figure FIG. 9
FIG. 10(p. 8)figure FIG. 10
FIG. 11(p. 8)figure FIG. 11
FIG. 12(p. 9)figure FIG. 12
FIG. 13(p. 9)figure FIG. 13
FIG. 14(p. 9)figure FIG. 14
FIG. 15(p. 10)figure FIG. 15

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74 ATOMIC AND MOLECULAR PHYSICS
Light-matter interaction
Nonlinear optics
Quantum description of light-matter interaction
Quantum optics
Ultrafast optics
Ultrafast phenomena
Ultrashort pulses
Weyl semimetal