version 0.012


Photonic - A perl package for calculations on photonics and metamaterials.

Copyright (C) 1916 by W. Luis Mochán

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA

    Instituto de Ciencias Físicas, UNAM
    Apartado Postal 48-3
    62251 Cuernavaca, Morelos


   use Photonic::WE::S::Green;
   my $G=Photonic::WE::S::Green->new(metric=>$m, nh=>$nh);
   my $GreenTensor=$G->evaluate($epsB);


Calculates the retarded green's tensor for a given fixed Photonic::WE::S::Metric structure as a function of the dielectric functions of the components.


  • new(metric=>$m, nh=>$nh, smallH=>$smallH, smallE=>$smallE, keepStates=>$k)

    Initializes the structure.

    $m Photonic::WE::S::Metric describing the structure and some parametres.

    $nh is the maximum number of Haydock coefficients to use.

    $smallH and $smallE are the criteria of convergence (default 1e-7) for Haydock coefficients and continued fraction

    $k is a flag to keep states in Haydock calculations (default 0)

  • evaluate($epsB)

    Returns the macroscopic Green's operator for a given value of the dielectric functions of the particle $epsB. The host's response $epsA is taken from the metric.

ACCESORS (read only)

  • keepStates

    Value of flag to keep Haydock states

  • epsA

    Dielectric function of component A

  • epsB

    Dielectric function of componente B

  • u

    Spectral variable

  • haydock

    Array of Photonic::WE::S::AllH structures, one for each polarization

  • greenP

    Array of Photonic::WE::S::GreenP structures, one for each direction.

  • greenTensor

    The Green's tensor of the last evaluation

  • nh

    The maximum number of Haydock coefficients to use.

  • nhActual

    The actual number of Haydock coefficients used in the last calculation

  • converged

    Flags that the last calculation converged before using up all coefficients

  • smallH, smallE

    Criteria of convergence of Haydock coefficients and continued fraction. 0 means don't check.