{"id":390509,"date":"2024-10-20T10:05:43","date_gmt":"2024-10-20T10:05:43","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-simulate-a-non-circular-ring-modulator-structure\/"},"modified":"2024-10-20T10:05:43","modified_gmt":"2024-10-20T10:05:43","slug":"how-to-simulate-a-non-circular-ring-modulator-structure","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-simulate-a-non-circular-ring-modulator-structure\/","title":{"rendered":"How to Simulate a Non-Circular Ring Modulator Structure"},"content":{"rendered":"

<p>Dear Technical Support Team,<\/p><p>I am currently working on the design of a ring modulator (MRM) and would like to modify an existing ring resonator as the base. Based on the examples provided on your official website, the design process mainly assumes a circular ring with uniform width, but my situation differs, so I am seeking your guidance.<\/p><p>Specifically, the inner ring of my ring resonator is not perfectly circular, and the width of the ring waveguide varies at different cross-sections, resulting in the effective refractive index (<span class=”katex”><span class=”katex-mathml”>neffn_{\\text{eff}}<\/span><span class=”katex-html” aria-hidden=”true”><span class=”base”><span class=”mord”><span class=”mord mathnormal”>n<\/span><span class=”msupsub”><span class=”vlist-t vlist-t2″><span class=”vlist-r”><span class=”vlist”><span class=”sizing reset-size6 size3 mtight”><span class=”mord mtight”><span class=”mord text mtight”>eff<\/span><\/span><\/span><\/span><span class=”vlist-s”>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>) changing with the position. Under these conditions, I have the following questions:<\/p><\/p>\n

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  1. <p>Simulation of Non-Uniform Width and Non-Circular Structure<\/strong>: Since the effective refractive index changes with the width of the waveguide, how should I accurately simulate such a non-standard geometry in Lumerical? Are there specific modules or methods suitable for handling such structures?<\/p><\/li>\n
  2. <p>Impact of Doping on the Simulation<\/strong>: Due to the varying effective refractive index across different widths, I am unsure how to proceed with the doping simulation, especially considering how varying doping concentrations and refractive index changes at different positions may affect the overall simulation results.<\/p><\/li>\n
  3. <p>Recommended Simulation Approach<\/strong>: For this non-standard ring modulator structure, do you have any recommended simulation workflows, mesh settings, or configurations to ensure accurate simulation of refractive index variations and the effects of doping?<\/p><\/li>\n<\/ol>\n

    <p>(Below is the structure of my ring resonator design by fdtd.)<\/p><p>\"\"<\/p><p>Thank you very much for your assistance. I look forward to your advice and guidance.<\/p><p>Best regards<\/p><\/p>\n","protected":false},"template":"","class_list":["post-390509","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t