Fig. 3: CEP control of SHG.
From: Petahertz non-linear current in a centrosymmetric organic superconductor
a Schematic illustrations of the CEP (φCEP = 0, π) and the pair of BK-7 plates (thickness 1 mm) for changing the relative CEP ΔφCEP (θ: incident angle of light). b Interference spectrum between 2f and 3f of the fundamental light. The 2f and 3f are generated using β-BBO. c Δφ as a function of θ (which is obtained by the 2f–3f interferometer). d Intensity change of the SHG (ΔISH/ISH) as a function of Δφ. The red curve is obtained by averaging the data (guide to the eye).
