Symmetry-selective terahertz difference-frequency spectroscopy identifies truly chiral phonons by resolving chirality via specific nonlinear tensor elements and confirming circular lattice motion through time-dependent polarization rotation in α-quartz and α-TeO₂.
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Probing phonon chirality and circular lattice motion with symmetry-selective nonlinear optical spectroscopy
Symmetry-selective terahertz difference-frequency spectroscopy identifies truly chiral phonons by resolving chirality via specific nonlinear tensor elements and confirming circular lattice motion through time-dependent polarization rotation in α-quartz and α-TeO₂.