{"id":380977,"date":"2024-08-29T02:36:11","date_gmt":"2024-08-29T02:36:11","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-of-pulsed-light-input-germanium-silicon-detector\/"},"modified":"2024-08-29T02:36:11","modified_gmt":"2024-08-29T02:36:11","slug":"simulation-of-pulsed-light-input-germanium-silicon-detector","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-of-pulsed-light-input-germanium-silicon-detector\/","title":{"rendered":"Simulation of pulsed light input germanium silicon detector"},"content":{"rendered":"

<p>Hello\uff01<\/p><p>I have some questions to consult after referring to the simulation examples of germanium silicon photodetectors and the introduction of charge solver on the official website.<\/p><\/p>\n

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  1. I want to simulate the response of the photodetector after the pulse light enters the photodetector. First, I set the light source as the pulse light source in FDTD, and other Settings remain unchanged. The solution result of this part is almost the same as that of the DC light input, the only difference is that the DC light is a single frequency light, so the absorption rate is only one frequency point, while the pulse light has a certain spectral width, so the absorption rate is several points on the spectrum, I use the average value of these points as the absorption rate. I adjusted the amplitude values of pulse light source, and the result was unchanged. Are there any problems with the setup of this step and the solution results?<\/li>\n
  2. Assuming that there is no problem with the simulation result of FDTD, that is, the carrier generation rate under the input power of a certain pulse light source is obtained, then in the next step in the simulation of charge, the actual physical process may be due to the high peak power of the pulse light source, so a large number of carriers will be generated at the peak position. These carriers may further cause a strong space charge shielding effect, which affects the model of the carrier transport equation. I would like to know whether the charge solver has taken this process into account, because in the introduction of the charge solver, I did not see specific expressions about mobility and diffusion coefficient, and I do not know whether there is a more complex formula mechanism behind it that can directly simulate this process.<\/li>\n<\/ol>\n

    <p>At present, the main problems are the following two aspects: on the one hand,how to correctly modify the simulation settings from the the DC light source input to the pulse light source input in FDTD to solve the photo-generated carrier rate ; On the other hand, whether the model of the carrier transport equation of the charge solver includes the space charge effect or other effects.<\/p><p>Thanks.<\/p><\/p>\n","protected":false},"template":"","class_list":["post-380977","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["294042","33648"],"_bbp_author_ip":["106.39.42.249"],"_btv_view_count":["249"],"_bbp_topic_status":["unanswered"],"_bbp_notification_enabled":["294042"],"_bbp_topic_id":["380977"],"_bbp_forum_id":["27833"],"_bbp_engagement":["33648","294042"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["381863"],"_bbp_last_active_id":["381863"],"_bbp_last_active_time":["2024-09-09 03:07:30"]},"test":"14021025buaa-edu-cn"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/380977","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\/380977\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=380977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}