Anomalous ultrafast all-optical Hall effect in gapped graphene
- Georgia State University, Atlanta, GA (United States)
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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