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::LE::NP::EpsL;
   my $eps=Photonic::LE::NP::EpsL->new(nr=>$nr, nh=>$nh);
   my $epsilonLongitudinal=$eps->evaluate($epsA, $epsB);


Calculates the macroscopic longitudinal dielectric function for a given fixed Photonic::LE::NP::AllH structure as a function of the dielectric functions of the components.


  • new(nr=>$nr, nh=>$nh, smallE=>$smallE)

    Initializes the structure.

    $nr is a Photonic::LE::NP::AllH structure (required).

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

    $smallE is the criteria of convergence for the continued fraction and determines the precision of the results. It defaults to 1e-7.

ACCESORS (read only)

  • epsL

    The longitudinal macroscopic function.

  • nr

    The LE::NP::AllH structure

  • 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

  • smallE

    Criteria of convergence for continued fraction. 0 means don't check.