{"id":359543,"date":"2024-03-28T23:16:45","date_gmt":"2024-03-28T23:16:45","guid":{"rendered":"\/forum\/forums\/reply\/359543\/"},"modified":"2024-03-28T23:16:45","modified_gmt":"2024-03-28T23:16:45","slug":"359543","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/359543\/","title":{"rendered":"Reply To: Query regarding the way to shift an optical spectrum"},"content":{"rendered":"<p>&lt;p&gt;Hi Anindya ,&lt;\/p&gt;&lt;p&gt;I am not sure what does this mean &#8220;whenever I change the refractive index of a medium then it will introduce a shift in the source spectrum &#8220;.&lt;\/p&gt;&lt;p&gt;In theory, the source spectrum is what you set, which should not depend on the device. In other words, any device should not change the source spectrum. However the output results, such as tranmission\/reflection for periodic strcutures, or the phase (and magnitude) of the dominate E field component can change with device, in your case it is the change of the refractive index.&lt;\/p&gt;&lt;p&gt;When the device is showing in the simulation, the result from the monitor in betwwen the source and the device is the net flow of incidence and reflection. Thus it does not measure the source. If you really want to measure the source spectrum, you can disable the device and do an empty simulation.&lt;\/p&gt;&lt;p&gt;Please check what device you are simulating and what quantity is better to extract the information you need.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-359543","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=\"Hi Anindya ,I am not sure what does this mean &quot;whenever I change the refractive index of a medium then it will introduce a shift in the source spectrum &quot;.In theory, the source spectrum is what you set, which should not depend on the device. 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