Related Experiment Video
Updated: Dec 2, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
Tuning layer-hybridized moiré excitons by the quantum-confined Stark effect
Yanhao Tang1, Jie Gu1, Song Liu2
1School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA.
Abstract:
Moiré superlattices offer an unprecedented opportunity for tailoring interactions between quantum particles1-11 and their coupling to electromagnetic fields12-18. Strong superlattice potentials generate moiré minibands of excitons16-18-bound pairs of electrons and holes that reside either in a single layer (intralayer excitons) or in two separate layers (interlayer excitons). Twist-angle-controlled interlayer electronic hybridization can also mix these two types of exciton to combine their strengths13,19,20. Here we report the direct observation of layer-hybridized moiré excitons in angle-aligned WSe2/WS2 and MoSe2/WS2 superlattices by optical reflectance spectroscopy. These excitons manifest a hallmark signature of strong coupling in WSe2/WS2, that is, energy-level anticrossing and oscillator strength redistribution under a vertical electric field. They also exhibit doping-dependent renormalization and hybridization that are sensitive to the electronic correlation effects. Our findings have important implications for emerging many-body states in two-dimensional semiconductors, such as exciton condensates21 and Bose-Hubbard models22, and optoelectronic applications of these materials.
Related Concept Videos
IR Absorption Frequency: Hybridization
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
π Electron Effects on Chemical Shift: Overview
Hybridization of Atomic Orbitals II
IR Absorption Frequency: Delocalization
In IR...
UV–Vis Spectroscopy: Molecular Electronic Transitions

