{"id":380865,"date":"2024-08-28T12:46:35","date_gmt":"2024-08-28T12:46:35","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-calculate-power-dissipation-spectra\/"},"modified":"2024-08-28T12:46:35","modified_gmt":"2024-08-28T12:46:35","slug":"how-to-calculate-power-dissipation-spectra","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-calculate-power-dissipation-spectra\/","title":{"rendered":"How to calculate power dissipation spectra ?"},"content":{"rendered":"<p>&lt;p&gt;In the OLED field, Power Dissipation Spectra are typically calculated using Python or dedicated tools.&nbsp;&lt;br&gt;Commonly used tools for this purpose include TechWiz from a different company or SETFOS from Fluxim, which can be used to obtain the Power Dissipation Spectra.&lt;br&gt;&nbsp;As shown in Figure 1, it is possible to observe air, substrate, WG, and SPP modes simply from the graph.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/28-08-2024-1724848627-f1 (2).png\" alt=\"\" \/>&lt;\/p&gt;&lt;p style=&#8221;text-align: center;&#8221;&gt;Figure 1. Calculation results of TE- and TM-polarized power dissipation spectrum (The four regions of the air, substrate, WG, and SPP modes are marked in the different shaded colors of sky blue, gray, yellow, and pink.)&lt;\/p&gt;&lt;p&gt;To find a similar feature in FDTD, I tried applying the example provided in the response at this link(&nbsp;<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/power-dissipation-spectra\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/power-dissipation-spectra\/<\/a> ).&nbsp;&lt;br&gt;However, unlike the Python-calculated results shown in Figure 2(left python, right fdtd), I encountered the following issues with FDTD:&lt;\/p&gt;&lt;p&gt;<strong>1.The intensity of the Dissipated Power is different.<\/strong>&lt;br&gt;This issue seems to be due to an error in the formula used to calculate the Dissipated Power.&nbsp;&lt;br&gt;I am curious if there is a built-in function in FDTD that calculates this correctly.&lt;\/p&gt;&lt;p&gt;<strong>2.Unable to calculate with normalized in-plane wavevector.<\/strong>&lt;br&gt;When sweeping the Bloch boundary condition value \ud835\udc58&nbsp;at each wavelength from 400 to 700 nm, the calculation is performed.&lt;\/p&gt;&lt;p&gt;Afterward, I face difficulties in dividing the obtained k value by the wavelength to compute the normalized wavevector.&lt;\/p&gt;&lt;p&gt;<strong>3. FDTD can only perform 1D calculations.<\/strong>&lt;br&gt;The example from the link uses FDTD in 2D, but with one span dimension made extremely thin, effectively making it a 1D calculation. However, since we need to calculate the dissipated power with a nanostructure in the future, I am looking for a way to perform this calculation in 2D.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/28-08-2024-1724848558-f1 (1).png\" alt=\"\" \/>&lt;\/p&gt;&lt;p style=&#8221;text-align: center;&#8221;&gt;Figure 2 .Dissipated Power Calculated by python (left) , by FDTD (right)&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-380865","topic","type-topic","status-publish","hentry","topic-tag-Bloch-1","topic-tag-fdtd","topic-tag-power"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["448675","2592"],"_bbp_author_ip":["163.152.185.196"],"_btv_view_count":["306"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["380865"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","448675"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["380940"],"_bbp_last_active_id":["380940"],"_bbp_last_active_time":["2024-08-28 18:59:57"]},"test":"kgc430korea-ac-kr"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/380865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/380865\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=380865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}