Related papers: Confinement of long-lived interlayer excitons in WS$_2$/WSe$

Confinement of long-lived interlayer excitons in WS$_2$/WSe$_2$ heterostructures

URL: http://arxiv.org/abs/2005.02416v1
Date: Tue, 5 May 2020 18:00:23 GMT
Title: Confinement of long-lived interlayer excitons in WS$_2$/WSe$_2$ heterostructures
Authors: Alejandro R.-P. Montblanch, Dhiren M. Kara, Ioannis Paradisanos, Carola M. Purser, Matthew S. G. Feuer, Evgeny M. Alexeev, Lucio Stefan, Ying Qin, Mark Blei, Gang Wang, Alisson R. Cadore, Pawel Latawiec, Marko Lon\v{c}ar, Sefaattin Tongay, Andrea C. Ferrari, Mete Atat\"ure
Abstract summary: Interlayer excitons in layered materials constitute a novel platform to study many-body phenomena. The ability to localise individual interlayer excitons in potential energy traps is a key step towards simulating Hubbard physics in artificial lattices.
Score: 46.54330737332151
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Interlayer excitons in layered materials constitute a novel platform to study many-body phenomena arising from long-range interactions between quantum particles. The ability to localise individual interlayer excitons in potential energy traps is a key step towards simulating Hubbard physics in artificial lattices. Here, we demonstrate spatial localisation of long-lived interlayer excitons in a strongly confining trap array using a WS$_{2}$/WSe$_{2}$ heterostructure on a nanopatterned substrate. We detect long-lived interlayer excitons with lifetime approaching 0.2 ms and show that their confinement results in a reduced lifetime in the microsecond range and stronger emission rate with sustained optical selection rules. The combination of a permanent dipole moment, spatial confinement and long lifetime places interlayer excitons in a regime that satisfies one of the requirements for observing long-range dynamics in an optically resolvable trap lattice.

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