Control of electrons and polaritons by patterning the 3D environment of a 2D material

by Dr. Hanan Herzig Sheinfux

ICFO, Spain
at Condensed Matter Seminar

Mon, 26 Dec 2022, 11:10
Sacta-Rashi Building for Physics (54), room 207


An important, yet sometimes understated, property of 2D materials is that they are embedded in a 3D environment, which makes them amenable to external manipulation in ways in which 3D materials are not. In this talk, I will demonstrate two applications of this concept:

(1) Periodically patterned electrodes can induce an artificial superlattice in quantum materials such as graphene. Using a newly developed technique, the period of the artificial superlattice can approach the period of the moiré pattern in heterostructures such as magic angle graphene, but with complete freedom in choosing lattice geometry. Specifically, for a kagome lattice geometry, we study particle-hole asymmetry and surprising magnetotransport effects induced by the superlattice. Finally, I will discuss the prospects of this approach to produce artificial correlated phases.

(2) I will demonstrate how polaritons can be confined to volumes 8 orders of magnitude smaller than the volume of a vacuum photon while still maintaining an appreciable quality factor (Q~100). This breaks away from the nanophotonics paradigm that deep subwavelength cavities always exhibit low quality factors (high absorption) and paves the way to exciting cavity quantum electrodynamics experiments.

Created on 09-11-2022 by Meidan, Dganit (dganit)
Updaded on 20-12-2022 by Meidan, Dganit (dganit)