examples/notebooks/Optical_constants_using_SOPRA_db.ipynb

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   "source": [
    "from solcore import material\n",
    "\n",
    "import numpy as np\n",
    "import matplotlib.pyplot as plt\n",
    "\n",
    "# Initiate some variables...\n",
    "wl = np.linspace(300, 1800, 1000)\n",
    "Al_fraction = np.linspace(10, 100, 10)\n",
    "\n",
    "# Load GaAs n and k data from the Sopra database...\n",
    "GaAs = material(\"GaAs\", sopra=True)(T=300)\n",
    "GaAs_n = GaAs.n(wl*1e-9)\n",
    "GaAs_k = GaAs.k(wl*1e-9)\n",
    "\n",
    "# Load Ge n and k data from Sopra database...\n",
    "Ge = material(\"Ge\", sopra=True)(T=300)\n",
    "Ge_n = Ge.n(wl*1e-9)\n",
    "Ge_k = Ge.k(wl*1e-9)\n",
    "\n",
    "# Load AlGaAs k data for a range of compositions...\n",
    "AlGaAs = material(\"AlGaAs\", sopra=True)\n",
    "\n",
    "AlGaAs_k = [GaAs_k]\n",
    "\n",
    "for comp in Al_fraction:\n",
    "    AlGaAs_k.append(AlGaAs(T=300, Al=comp/100).k(wl*1e-9))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Plot the data...\n",
    "colors = plt.cm.jet(np.linspace(0,1,len(Al_fraction)+1))\n",
    "\n",
    "f, (ax1, ax2) = plt.subplots(1, 2, figsize=(11.25,4))\n",
    "ax1b = ax1.twinx()\n",
    "\n",
    "lns1 = ax1.plot(wl, GaAs_n, 'b', label='n, GaAs')\n",
    "lns2 = ax1b.plot(wl, GaAs_k, 'r', label='k, GaAs')\n",
    "\n",
    "lns3 = ax1.plot(wl, Ge_n, ls=\"--\", color='blue', label='n, Ge')\n",
    "lns4 = ax1b.plot(wl, Ge_k,ls=\"--\", color='red', label='k, Ge')\n",
    "\n",
    "ax1.set_xlim([300,1800])\n",
    "ax1b.set_xlim([300,1800])\n",
    "ax1b.set_ylim([0, 3.8])\n",
    "\n",
    "# added these three lines\n",
    "lns = lns1+lns2+lns3+lns4\n",
    "labs = [l.get_label() for l in lns]\n",
    "ax1.legend(lns, labs, loc=\"upper right\", frameon=False)\n",
    "ax1.text(0.05, 0.9, '(a)', transform=ax1.transAxes, fontsize=12)\n",
    "\n",
    "ax1.set_xlabel(\"Wavelength (nm)\")\n",
    "ax1.set_ylabel(\"Refractive Index, n\")\n",
    "ax1b.set_ylabel(\"Extinction Coefficient, k\")\n",
    "\n",
    "for i, k in enumerate(Al_fraction):\n",
    "    ax2.plot(wl, AlGaAs_k[i], color=colors[i+1], label='{}%'.format(int(Al_fraction[i])))\n",
    "\n",
    "ax2.set_xlim([300, 900])\n",
    "ax2.set_ylim([0, 2.8])\n",
    "\n",
    "ax2.set_xlabel(\"Wavelength (nm)\")\n",
    "ax2.set_ylabel(\"Extinction Coefficient, k\")\n",
    "ax2.legend(loc=\"upper right\", frameon=False)\n",
    "ax2.text(0.05, 0.9, '(b)', transform=ax2.transAxes, fontsize=12)\n",
    "plt.tight_layout(w_pad=4)\n",
    "\n",
    "plt.show()"
   ]
  }
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