Figure 2: Measured isolator performances.
From: Near optimal graphene terahertz non-reciprocal isolator
Measures have been performed at T=290 K. (a) Schematic of the measurement setup configuration and definition of elliptical polarization parameters. (b) Measured elliptic polarization parameters (major and minor axis Emin, Emax and Kerr rotation angle, ϕ) as a function of frequency for B=0 T and 7 T. Emin, Emax are normalized with respect to Einc. The measures have been fitted (dashed traces) with the multilayer model (see Supplementary Note 4), and the best fit is obtained for μc=0.53 eV, τ=35 fs, d=9.15 μm, additional loss: 30%. (c) Polarization state shown for some representative frequencies. (d) The extracted performances (isolation and insertion loss expressed both as positive dB quantities) of the isolator for circularly polarized waves. See also Supplementary Fig. 4.
