Raman Forbidden Layer-Breathing Modes in Layered Semiconductor Materials Activated by Phonon and Optical Cavity Effects

Abstract

We report Raman forbidden layer-breathing modes (LBMs) in layered semiconductor materials (LSMs). The intensity distribution of all observed LBMs depends on layer number, incident light wavelength and refractive index mismatch between LSM and underlying substrate. These results are understood by a Raman scattering theory via the proposed spatial interference model, where the naturally occurring optical and phonon cavities in LSMs enable spatially coherent photon-phonon coupling mediated by the corresponding one-dimensional periodic electronic states. Our work reveals the spatial coherence of photon and phonon fields on the phonon excitation via photon/phonon cavity engineering.

Please check the initial version on the website of Research Square at https://doi.org/10.21203/rs.3.rs-4156671/v1

References in corpus (20)

• Raman spectroscopy as a versatile tool for studying the properties of graphene
• Evolution of Electronic Structure in Atomically Thin Sheets of WS2 and WSe2
• Optical Spectrum of MoS${}_2$: Many-body Effects and Diversity of Exciton States
• Measurement of the optical dielectric function of transition metal dichalcogenide monolayers: MoS2, MoSe2, WS2 and WSe2
• The Shear Mode of Multi-Layer Graphene
• Interlayer breathing and shear modes in few-trilayer MoS2 and WSe2
• Shear and Layer Breathing Modes in Multilayer MoS2
• Helicity resolved Raman scattering of MoS2, MoSe2, WS2 and WSe2 atomic layers
• Coherent mixing of mechanical excitations in nano-optomechanical structures
• Davydov splitting and excitonic resonance effects in Raman spectra of few-Layer MoSe2
• Towards compact phase-matched and waveguided nonlinear optics in atomically layered semiconductors
• Phonons of graphene and graphitic materials derived from the empirical potential LCBOPII
• Cavity-Enhanced Linear Dichroism in a van der Waals Antiferromagnet
• Dimensional crossover of acoustic phonon lifetime in $2H$-MoSe${}_2$
• Observation of forbidden phonons and dark excitons by resonance Raman scattering in few-layer WS${}_2$
• Interlayer bond polarizability model for stacking-dependent low-frequency Raman scattering in layered materials
• Quantum interference effects in resonant Raman spectroscopy of single- and triple-layer MoTe${}_2$ from first principles
• Shear and breathing modes of layered materials
• Non-adiabatic exciton-phonon coupling in Raman spectroscopy of layered materials
• Symmetry-resolved two-magnon excitations in a strong spin-orbit-coupled bilayer antiferromagnet

Cited by in corpus (2)

• Quantitatively predicting angle-resolved polarized Raman intensity of anisotropic layered materials
• Plasmonic nanocavity-enabled universal detection of layer-breathing vibrations in two-dimensional materials