{"id":372083,"date":"2024-07-16T10:50:45","date_gmt":"2024-07-16T10:50:45","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fdtd-transmission-fluctuation\/"},"modified":"2024-07-16T10:54:49","modified_gmt":"2024-07-16T10:54:49","slug":"fdtd-transmission-fluctuation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fdtd-transmission-fluctuation\/","title":{"rendered":"FDTD transmission fluctuation"},"content":{"rendered":"<p>I&#8217;m currently trying to simulate the difference in transmittance as a function of the type of substrate material, and I&#8217;m repeatedly getting excessively fluctuating values for TRANSMISSION for materials with an imaginary part near zero, such as SIO2.<br \/>Is there any way to solve this problem?<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/16-07-2024-1721127240-123.png\" alt=\"\"><\/p>\n<p><img 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