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user-defined-material.cpp
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/
user-defined-material.cpp
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/***************************************************************/
/* test of user-defined materials in libmeepgeom. */
/* this code creates a user-defined material (defined by the */
/* function my_material_func below) that reproduces the */
/* material geometry of the cyl_ellipsoid example. */
/***************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <complex>
#include "meep.hpp"
#include "ctl-math.h"
#include "ctlgeom.h"
#include "meepgeom.hpp"
#ifndef DATADIR
#define DATADIR "./"
#endif
/***************************************************************/
/* geometric parameters ****************************************/
/***************************************************************/
#define R1X 0.5 // ellipsoid minor radius
#define R1Y 1.0 // ellipsoid major radius
#define R2 3.0 // cylinder radius
/***************************************************************/
/* parameters in (two-oscillator) Drude-Lorenz model of Ag */
/***************************************************************/
#define EV_UM (1.0 / 1.23984193)
#define AG_WP (9.01 * EV_UM)
#define AG_F0 0.845
#define AG_FRQ0 1.0e-10
#define AG_GAM0 0.48 * EV_UM
#define AG_SIG0 (AG_F0 * AG_WP * AG_WP) / (AG_FRQ0 * AG_FRQ0)
#define AG_FRQ1 0.065
#define AG_GAM1 0.816 * EV_UM
#define AG_SIG1 (AG_F0 * AG_WP * AG_WP) / (AG_FRQ1 * AG_FRQ1)
using namespace meep;
typedef std::complex<double> cdouble;
/***************************************************************/
/* return true if the datasets match, false if not */
/***************************************************************/
bool compare_hdf5_datasets(const char *file1, const char *name1, const char *file2,
const char *name2, int expected_rank = 2, double rel_tol = 1.0e-2) {
h5file f1(file1, h5file::READONLY, false);
int rank1;
size_t *dims1 = new size_t[expected_rank];
realnum *data1 = (realnum *)f1.read(name1, &rank1, dims1, expected_rank, sizeof(realnum) == sizeof(float));
if (!data1) return false;
h5file f2(file2, h5file::READONLY, false);
int rank2;
size_t *dims2 = new size_t[expected_rank];
realnum *data2 = (realnum *)f2.read(name2, &rank2, dims2, expected_rank, sizeof(realnum) == sizeof(float));
if (!data2) return false;
if (rank1 != expected_rank || rank2 != expected_rank) return false;
size_t size = 1;
for (int r = 0; r < expected_rank; r++) {
if (dims1[r] != dims2[r]) return false;
size *= dims1[r];
};
double norm1 = 0.0, norm2 = 0.0, normDelta = 0.0;
for (size_t n = 0; n < size; n++) {
double d1 = data1[n], d2 = data2[n], delta = d1 - d2;
norm1 += d1 * d1;
norm2 += d2 * d2;
normDelta += delta * delta;
};
norm1 = sqrt(norm1) / size;
norm2 = sqrt(norm2) / size;
normDelta = sqrt(normDelta) / size;
double norm12 = fmax(sqrt(norm1), sqrt(norm2));
if (normDelta > rel_tol * norm12) return false;
return true;
}
/***************************************************************/
/* dummy material function needed to pass to structure( ) */
/* constructor as a placeholder before we can call */
/* set_materials_from_geometry */
/***************************************************************/
double dummy_eps(const vec &) { return 1.0; }
/***************************************************************/
/* material function that recreates the ellipsoid-in-cylinder */
/* configuration of the cyl-ellipsoid sample code */
/***************************************************************/
typedef struct my_material_func_data {
double rxInner, ryInner, rOuter;
bool with_susceptibility;
} my_material_func_data;
void my_material_func(vector3 p, void *user_data, meep_geom::medium_struct *m) {
my_material_func_data *data = (my_material_func_data *)user_data;
double rxInner = data->rxInner, rxInner2 = rxInner * rxInner;
double ryInner = data->ryInner, ryInner2 = ryInner * ryInner;
double rOuter = data->rOuter, rOuter2 = rOuter * rOuter;
double x = p.x, x2 = x * x, y = p.y, y2 = y * y;
// test for point inside inner ellipsoid
bool innermost = ((x2 / rxInner2 + y2 / ryInner2) < 1.0);
bool outermost = ((x * x + y * y) > rOuter2);
bool in_middle = (!innermost && !outermost);
// set permittivity
double nn = in_middle ? 3.5 : 1.0;
m->epsilon_diag.x = m->epsilon_diag.y = m->epsilon_diag.z = nn * nn;
// add susceptibilities (two-oscillator model for Ag)
if (in_middle && data->with_susceptibility) {
m->E_susceptibilities.resize(2);
m->E_susceptibilities[0].sigma_offdiag.x = 0.0;
m->E_susceptibilities[0].sigma_offdiag.y = 0.0;
m->E_susceptibilities[0].sigma_offdiag.z = 0.0;
m->E_susceptibilities[0].sigma_diag.x = AG_SIG0;
m->E_susceptibilities[0].sigma_diag.y = AG_SIG0;
m->E_susceptibilities[0].sigma_diag.z = AG_SIG0;
m->E_susceptibilities[0].frequency = AG_FRQ0;
m->E_susceptibilities[0].gamma = AG_GAM0;
m->E_susceptibilities[0].noise_amp = 0.0;
m->E_susceptibilities[0].drude = true;
m->E_susceptibilities[0].is_file = false;
m->E_susceptibilities[1].sigma_offdiag.x = 0.0;
m->E_susceptibilities[1].sigma_offdiag.y = 0.0;
m->E_susceptibilities[1].sigma_offdiag.z = 0.0;
m->E_susceptibilities[1].sigma_diag.x = AG_SIG1;
m->E_susceptibilities[1].sigma_diag.y = AG_SIG1;
m->E_susceptibilities[1].sigma_diag.z = AG_SIG1;
m->E_susceptibilities[1].frequency = AG_FRQ1;
m->E_susceptibilities[1].gamma = AG_GAM1;
m->E_susceptibilities[1].noise_amp = 0.0;
m->E_susceptibilities[1].drude = true;
m->E_susceptibilities[1].is_file = false;
}
}
/***************************************************************/
/***************************************************************/
/***************************************************************/
int main(int argc, char *argv[]) {
initialize mpi(argc, argv);
// simple argument parsing
meep::component src_cmpt = Ez;
std::string eps_ref_file = "cyl-ellipsoid-eps-ref.h5";
bool with_susceptibility = true;
for (int narg = 1; narg < argc; narg++) {
if (argv[narg] && !strcmp(argv[narg], "--eps_ref_file")) {
if (narg + 1 == argc) meep::abort("no option specified for --eps_ref_file");
eps_ref_file = argv[++narg];
}
else if (argv[narg] && !strcmp(argv[narg], "--without_susceptibility"))
with_susceptibility = false;
else
meep::abort("unrecognized command-line option %s", argv[narg]);
};
std::string eps_ref_path = DATADIR + eps_ref_file;
double resolution = 100.0;
geometry_lattice.size.x = 10.0;
geometry_lattice.size.y = 10.0;
geometry_lattice.size.z = 0.0;
grid_volume gv = voltwo(10.0, 10.0, resolution);
gv.center_origin();
symmetry sym = (src_cmpt == Ez) ? mirror(X, gv) + mirror(Y, gv) : -mirror(X, gv) - mirror(Y, gv);
structure the_structure(gv, dummy_eps, pml(1.0), sym);
my_material_func_data data;
data.with_susceptibility = with_susceptibility;
data.rxInner = R1X;
data.ryInner = R1Y;
data.rOuter = R2;
meep_geom::material_type my_material =
meep_geom::make_user_material(my_material_func, (void *)&data, false);
geometric_object_list g = {0, 0};
vector3 center = {0, 0, 0};
bool use_anisotropic_averaging = true;
bool ensure_periodicity = true;
meep_geom::set_materials_from_geometry(&the_structure, g, center, use_anisotropic_averaging,
DEFAULT_SUBPIXEL_TOL, DEFAULT_SUBPIXEL_MAXEVAL,
ensure_periodicity, my_material);
fields f(&the_structure);
f.output_hdf5(Dielectric, f.total_volume());
bool status = compare_hdf5_datasets("eps-000000000.h5", "eps", eps_ref_path.c_str(), "eps");
if (status)
master_printf("user-defined-material test successful.\n");
else
meep::abort("user-defined-material test failed.\n");
return 0;
}