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http://dx.doi.org/10.1103/physrevb.45.13064 | DOI Listing |
Nano Lett
August 2020
Photonics Laboratory, ETH Zürich, 8093 Zürich, Switzerland.
Van der Waals heterostructures assembled from two-dimensional materials offer a promising platform to engineer structures with desired optoelectronic characteristics. Here we use waveguide-coupled disk resonators made of hexagonal boron nitride (h-BN) to demonstrate cavity-coupled emission from interlayer excitons of a heterobilayer of two monolayer transition metal dichalcogenides. We sandwich a MoSe-WSe heterobilayer between two slabs of h-BN and directly pattern the resulting stack into waveguide-coupled disk resonators.
View Article and Find Full Text PDFUltramicroscopy
December 2015
Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR China.
The quantum size effect (QSE) in electron reflectivity from Fe thin films grown on a W(110) surface precovered with a two monolayer Cu film has been investigated using spin polarized low energy electron microscopy. Spin-dependent QSE-induced oscillations in the reflected intensity occur with energy and film thickness. The series of intensity peaks that is observed identifies spin-dependent quantum well resonances in the Fe film that are sensitive to electronic band structure and details of the buried interface.
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