Anisotropic 2D excitons unveiled in organic–inorganic quantum wells
Lorenzo Maserati, Sivan Refaely‐Abramson, Christoph Kastl, Christopher T. Chen, Nicholas J. Borys, Carissa N. Eisler, Mary S. Collins, Tess Smidt, Edward S. Barnard, Matthew Strasbourg, Elyse A. Schriber⧓, Brian Shevitski, Kaiyuan Yao, J. Nathan Hohman, P. James Schuck, Shaul Aloni, Jeffrey B. Neaton, Adam Schwartzberg
Abstract
. We find that the transient absorption measurements at room temperature can be understood in terms of low-lying excitons confined to the AgSe planes with in-plane anisotropy, featuring anisotropic absorption and emission. Finally, we present a pathway to control the exciton behaviour by changing the chalcogen in the material lattice. Our studies unveil unexpected excitonic anisotropies in an unexplored class of tuneable, yet air-stable, hybrid quantum wells, offering design principles for the engineering of an ordered, yet complex dielectric environment and its effect on the excitonic phenomena in such emerging materials.