def METHOD_NAME(self):
    self.c = 2.99792458e8 # in m/s
    self.plasma_wl = 146 # in nm, Constant for Au
    self.plasma_freq = 2 * np.pi * 2.99792458e8 / (self.plasma_wl * 1e-9) #radial frequency, Constant for Au
    self.eps_0 = pow((pow(2.9979e8, 2) * 4 * np.pi * 1e-7), -1) #Constant in F/m (SI units)
    self.cond_quant = 7.74809173e-5 #Constant