epsAu

permittivity gold

Usage

epsAu(
  wavelength,
  epsilon.infty = 1.54,
  lambda.p = 177.5,
  mu.p = 14500,
  A1 = 1.27,
  phi1 = -pi/4,
  lambda1 = 470,
  mu1 = 1900,
  A2 = 1.1,
  phi2 = -pi/4,
  lambda2 = 325,
  mu2 = 1060
)

Arguments

wavelength: wavelength in nm
epsilon.infty: background dielectric constant
lambda.p: plasma wavelength
mu.p: damping constant
A1: A1
phi1: phi1
lambda1: lambda1
mu1: mu1
A2: A2
phi2: phi2
lambda2: lambda2
mu2: mu2

Value

data.frame

Details

analytical dielectric function of Au (Drude model + interband transitions)

References

Principles of surface-enhanced Raman spectroscopy and related plasmonic effects Eric C. Le Ru and Pablo G. Etchegoin, published by Elsevier, Amsterdam (2009).

Author

baptiste Auguie

Examples

require(dielectric) ; data(AuJC)
wvl <- seq(300, 900)
gold <- epsAu(wvl)

matplot(gold$wavelength, cbind(Re(gold$epsilon), Im(gold$epsilon)), 
t="l", lty=1, xlab = "wavelength / nm", ylab = "Dielectric function")
matpoints(AuJC$wavelength, cbind(Re(AuJC$epsilon), Im(AuJC$epsilon)), pch=1)