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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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.