Selective observation of enantiomeric chiral phonons in $\alpha$-quartz

Abstract

We report anomalous circularly polarized Raman spectra of phonons in right- and left-handed quartzes. The phonon branches splitting from the E-mode at a finite wavenumber were found to be chiral with mutually opposite angular momenta. Our analysis reveals the Raman selection rules for chiral phonons. We also find that the conservation of angular momentum should be satisfied between two photons and one chiral phonon in the Raman process. Furthermore, we experimentally proved that the helicity of phonons with a certain frequency and wavevector should be opposite in the other enantiomer.

References in corpus (6)

• Truly chiral phonons in α-HgS
• Momentum-Dark Intervalley Exciton in Monolayer Tungsten Diselenide Brightened via Chiral Phonon
• Chiral Phonons in Chiral Materials
• Chiral phonons: circularly polarized Raman spectroscopy and $\text{ab initio}$ calculations in a chiral crystal tellurium
• Difference between angular momentum and pseudoangular momentum
• Phonon rotoelectric effect

Cited by in corpus (10)

• Emergence of chirality by multipole interconversion
• Electron-Chiral Phonon Coupling, Crystal Angular Momentum, and Phonon Chirality
• Description of molecular chirality and its analysis with high harmonic generation
• Symmetry analysis of cross-circular and parallel-circular Raman optical activity
• Ferroaxial phonons in chiral and polar NiCo2TeO6
• Thermal Einstein-de Haas Effect Induced by Chiral Phonons in Carbon Nanotubes
• Inelastic Neutron Scattering for Direct Detection of Chiral Phonons
• Microscopic Theory of Chiral-Phonon-Induced Orbital Selectivity in Helical Crystals
• Conservation law for angular momentum based on optical field derivatives: Analysis of optical spin-orbit conversion
• Anisotropic electron-phonon coupling and chiral phonons in van der Waals room temperature ferromagnet Fe${}_5$GeTe${}_2$