Core/Shell-Like Localized Emission at Atomically Thin Semiconductor-Au Interface

doi:10.1021/acs.nanolett.3c03790

Core/Shell-Like Localized Emission at Atomically Thin Semiconductor-Au Interface

2024-04-09

2

PRE

AI

K

Kiyoung Jo

C

Christopher E. Stevens

Joshua R. Hendrickson

D

Deep Jariwala *

DOI：10.1021/acs.nanolett.3c03790

Original

Original request for help

Save

Abstract

En 中文

Localized emission in atomically thin semiconductors has sparked significant interest as single-photon sources. Despite comprehensive studies into the correlation between localized strain and exciton emission, the impacts of charge transfer on nanobubble emission remains elusive. Here, we report the observation of core/shell-like localized emission from monolayer WSe2 nanobubbles at room temperature through near-field studies. By altering the electronic junction between monolayer WSe2 and the Au substrate, one can effectively adjust the semiconductor to metal junction from a Schottky to an Ohmic junction. Through concurrent analysis of topography, potential, tip-enhanced photoluminescence, and a piezo response force microscope, we attribute the core/shell-like emissions to strong piezoelectric potential aided by induced polarity at the WSe2-Au Schottky interface which results in spatial confinement of the excitons. Our findings present a new approach for manipulating charge confinement and engineering localized emission within atomically thin semiconductor nanobubbles. These insights hold implications for advancing the nano and quantum photonics with low-dimensional semiconductors.

Keywords:

localized emission

chargetransfer

semiconductor-metalinterface

piezoelectricity

tip-enhanced scanningprobe technique

Core/Shell-Like Localized Emission at Atomically Thin Semiconductor-Au Interface

Abstract

Journal

Organization