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Title: Anomalous ultrafast all-optical Hall effect in gapped graphene

Journal Article · · Nanophotonics (Online)

We propose an ultrafast all-optical anomalous Hall effect in two-dimensional (2D) semiconductors of hexagonal symmetry such as gapped graphene (GG), transition metal dichalcogenides (TMDCs), and hexagonal boron nitride (h-BN). To induce such an effect, the material is subjected to a sequence of two strong-field single-optical-cycle pulses: A chiral pump pulse followed within a few femtoseconds by a probe pulse linearly polarized in the armchair direction of the 2D lattice. Due to the effect of topological resonance, the first (pump) pulse induces a large chirality (valley polarization) in the system, while the second pulse generates a femtosecond pulse of the anomalous Hall current. The proposed effect is fundamentally the fastest all-optical anomalous Hall effect possible in nature. It can be applied to ultrafast all-optical storage and processing of information, both classical and quantum.

Research Organization:
Georgia State Univ., Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); National Science Foundation 9NSF)
Grant/Contract Number:
FG02-01ER15213; SC0007043; EFMA-1741691
OSTI ID:
1980997
Journal Information:
Nanophotonics (Online), Vol. 10, Issue 14; ISSN 2192-8614
Publisher:
de GruyterCopyright Statement
Country of Publication:
United States
Language:
English

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