Extended Data Fig. 5: Schemes of the experimental configurations to determine the electric fields of the fundamental, THG and FHG pulses.
From: Extremely efficient terahertz high-harmonic generation in graphene by hot Dirac fermions
Measurements were performed with graphene/SiO2 and with the bare SiO2 substrate. a, Set-up for the THG experiment used to measure the fundamental and harmonic simultaneously. b, Set-up to measure the harmonic in the FHG experiment. Two filters were used before the sample and two after the sample, to optimize the signal-to-noise ratio. c, Set-up to determine the electric fields for the fundamental in the FHG experiment.
