# Define U

# EL = (Ex + 1i*Ez)/sqrt(2);
# ER = (Ex - 1i*Ez)/sqrt(2);
# E_circular = U * E_cartesian, therefore:
U = [ 1, 0, 1i;
      0, sqrt(2), 0;
      1, 0, -1i] / sqrt(2);

# Set U as transformation matrix
select("faraday_attribute");
set("U",U);