{"id":348647,"date":"2024-02-02T18:06:04","date_gmt":"2024-02-02T18:06:04","guid":{"rendered":"\/forum\/forums\/reply\/348647\/"},"modified":"2024-02-02T18:06:04","modified_gmt":"2024-02-02T18:06:04","slug":"348647","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/348647\/","title":{"rendered":"Reply To: Help regarding the simulation domain , monitor dimensions"},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;Thank you for the reply.But, I am not clear about the FDTD simulation span and why the output results are varying for different simulation volume. I have SIC thin film of thickness 340nm. So, I have assumed it is infinitely long in x&amp;y directions. Then I have selected a FDTD Simulation region of 3x3x1um on my thin film which is 8x8x0.34um. Then I place a DFT monitor of 10x10x 0.4 This means that i have placed a DFT monitor at a height of 0.4um from the surface of my simulation region..please see the attached screen shots of the geometry of the structure.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/02-02-2024-1706896704-FDTD Simulation volume.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/02-02-2024-1706896670-Rectangle.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/02-02-2024-1706896889-FDTD farfield.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/02-02-2024-1706897047-Simulation window.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;This is how I have set up the simulation window and monitors. But, the issue is that If I am changing the simulation volume, the the farfield emission pattern is also changing. Please suggest if there is any way to solve this problem.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-348647","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello,Thank you for the reply.But, I am not clear about the FDTD simulation span and why the output results are varying for different simulation volume. I have SIC thin film of thickness 340nm. So, I have assumed it is infinitely long in x&amp;y directions. 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