Extended Data Fig. 3: Scheme of the set-up for detection of multiple harmonics up to the seventh order.
From: Extremely efficient terahertz high-harmonic generation in graphene by hot Dirac fermions
Two 0.3-THz bandpass filters (BP) are used to suppress the undulator harmonic background. A single 2.1-THz bandpass filter after the sample attenuates the fundamental, third and fifth harmonics to an extent that they can still be detected by the EOS set-up.
