Strain-induced dynamic control over the population of quantum emitters
in two-dimensional materials
- URL: http://arxiv.org/abs/2301.10273v1
- Date: Tue, 24 Jan 2023 19:09:27 GMT
- Title: Strain-induced dynamic control over the population of quantum emitters
in two-dimensional materials
- Authors: Matteo Savaresi, Abel Mart\'inez-Su\'arez, Davide Tedeschi, Giuseppe
Ronco, Aurelio Hierro-Rodr\'iguez, Stephen McVitie, Sandra Stroj, Johannes
Aberl, Moritz Brehm, Victor M. Garc\'ia-Su\'arez, Michele B. Rota, Pablo
Alonso-Gonz\'alez, Javier Mart\'in-S\'anchez, Rinaldo Trotta
- Abstract summary: We introduce a novel hybrid semiconductor-piezoelectric device in which WSe2 monolayers are integrated onto piezoelectric pillars.
Static strains are first used to induce the formation of quantum emitters, whose emission shows photon anti-bunching.
Their excitonic population and emission energy are then reversibly controlled via the application of a voltage to the piezoelectric pillar.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-nc-sa/4.0/
- Abstract: The discovery of quantum emitters in two-dimensional materials has triggered
a surge of research to assess their suitability for quantum photonics. While
their microscopic origin is still the subject of intense studies, ordered
arrays of quantum emitters are routinely fabricated using static
strain-gradients, which are used to drive excitons toward localized regions of
the 2D crystals where quantum-light-emission takes place. However, the
possibility of using strain in a dynamic fashion to control the appearance of
individual quantum emitters has never been explored so far. In this work, we
tackle this challenge by introducing a novel hybrid semiconductor-piezoelectric
device in which WSe2 monolayers are integrated onto piezoelectric pillars
delivering both static and dynamic strains. Static strains are first used to
induce the formation of quantum emitters, whose emission shows photon
anti-bunching. Their excitonic population and emission energy are then
reversibly controlled via the application of a voltage to the piezoelectric
pillar. Numerical simulations combined with drift-diffusion equations show that
these effects are due to a strain-induced modification of the
confining-potential landscape, which in turn leads to a net redistribution of
excitons among the different quantum emitters. Our work provides relevant
insights into the role of strain in the formation of quantum emitters in 2D
materials and suggests a method to switch them on and off on demand.
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