an> <span class="o">=</span> <span class="n">n_k_Ag</span><span class="p">[:,</span> <span class="mi">1</span><span class="p">]</span> <span class="o">+</span> <span class="mi">1</span><span class="n">j</span><span class="o">*</span><span class="n">n_k_Ag</span><span class="p">[:,</span> <span class="mi">2</span><span class="p">]</span>  <span class="c1"># Combine n and k into a complex refractive index</span>

<span class="n">n_k_SiO2</span> <span class="o">=</span> <span class="n">load_material_RF</span><