Double circular dichroism in high-harmonic emission survives only in broken time-reversal symmetry materials and carries opposite signs from bulk versus edge states, enabling their separation in photocurrent measurements.
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A tight-binding dimer model shows that the laser polarization maximizing high-harmonic yield flips from molecular axes to the intermolecular axis at higher orders, with the flip order depending on coupling strength, and this behavior is already present in adiabatically following states.
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Double circular dichroism high harmonic spectroscopy: An ultrafast probe for topological photocurrents
Double circular dichroism in high-harmonic emission survives only in broken time-reversal symmetry materials and carries opposite signs from bulk versus edge states, enabling their separation in photocurrent measurements.
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High-harmonic generation from two weakly coupled molecules: a simple tight-binding model
A tight-binding dimer model shows that the laser polarization maximizing high-harmonic yield flips from molecular axes to the intermolecular axis at higher orders, with the flip order depending on coupling strength, and this behavior is already present in adiabatically following states.