scatt/examples/example-minimal.cc

//**********************************************************************************//
//    Copyright (C) 2009-2015  Ovidio Pena <ovidio@bytesfall.com> // Copyright
//    (C) 2013-2015  Konstantin Ladutenko <kostyfisik@gmail.com>          //
//                                                                                  //
//    This file is part of scattnlay //
//                                                                                  //
//    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 3 of the License, 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. //
//                                                                                  //
//    The only additional remark is that we expect that all publications //
//    describing work using this software, or all commercial products // using
//    it, cite the following reference:                                       //
//    [1] O. Pena and U. Pal, "Scattering of electromagnetic radiation by //
//        a multilayered sphere," Computer Physics Communications, // vol. 180,
//        Nov. 2009, pp. 2348-2354.                                       //
//                                                                                  //
//    You should have received a copy of the GNU General Public License // along
//    with this program.  If not, see <http://www.gnu.org/licenses/>.         //
//**********************************************************************************//
//   This program evaluates absorption of a triple layered nanoparticle
#include <cassert>
#include <complex>
#include <cstdio>
#include <iomanip>
#include <sstream>
#include <string>

#include "../src/nmie-applied-impl.hpp"

int main(int, char**) {
  try {
    nmie::MultiLayerMieApplied<double> multi_layer_mie;
    const std::complex<double> epsilon_Si(18.4631066585, 0.6259727805);
    const std::complex<double> epsilon_Ag(-8.5014154589, 0.7585845411);
    const std::complex<double> index_Si = std::sqrt(epsilon_Si);
    const std::complex<double> index_Ag = std::sqrt(epsilon_Ag);
    double WL = 500;             // nm
    double core_width = 5.27;    // nm Si
    double inner_width = 8.22;   // nm Ag
    double outer_width = 67.91;  // nm  Si
    core_width = 5.27;           // nm Si
    inner_width = 8.22;          // nm Ag
    outer_width = 67.91;         // nm  Si
    multi_layer_mie.AddTargetLayer(core_width, index_Si);
    multi_layer_mie.AddTargetLayer(inner_width, index_Ag);
    multi_layer_mie.AddTargetLayer(outer_width, index_Si);
    multi_layer_mie.SetWavelength(WL);
    multi_layer_mie.RunMieCalculation();
    double Qabs = multi_layer_mie.GetQabs();
    std::stringstream stream;
    stream << std::fixed << std::setprecision(10) << Qabs;
    auto Qabs_str = stream.str();
    printf("Qabs = %s\n", Qabs_str.c_str());
    assert(Qabs_str == "3.1415556911");

  } catch (const std::invalid_argument& ia) {
    // Will catch if  multi_layer_mie fails or other errors.
    std::cerr << "Invalid argument: " << ia.what() << std::endl;
    return -1;
  }
  return 0;
}