Optical imprinting of superlattices in two-dimensional materials
- URL: http://arxiv.org/abs/1912.13059v4
- Date: Mon, 5 Oct 2020 18:49:35 GMT
- Title: Optical imprinting of superlattices in two-dimensional materials
- Authors: Hwanmun Kim, Hossein Dehghani, Hideo Aoki, Ivar Martin, and Mohammad
Hafezi
- Abstract summary: We use an optical method of shining circularly polarized and periodic laser fields to imprint structures in two-dimensional electronic systems.
By changing the configuration of the optical field, we synthesize various lattice structures with different spatial symmetry, periodicity, and strength.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We propose an optical method of shining circularly polarized and spatially
periodic laser fields to imprint superlattice structures in two-dimensional
electronic systems. By changing the configuration of the optical field, we
synthesize various lattice structures with different spatial symmetry,
periodicity, and strength. We find that the wide optical tunability allows one
to tune different properties of the effective band structure, including Chern
number, energy bandwidths, and band gaps. The in situ tunability of the
superlattice gives rise to unique physics ranging from the topological
transitions to the creation of the flat bands through the kagome superlattice,
which can allow a realization of strongly correlated phenomena in Floquet
systems. We consider the high-frequency regime where the electronic system can
remain in the quasiequilibrium phase for an extended amount of time. The
spatiotemporal reconfigurability of the present scheme opens up possibilities
to control light-matter interaction to generate novel electronic states and
optoelectronic devices.
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