{"id":381888,"date":"2024-09-09T07:27:00","date_gmt":"2024-09-09T07:27:00","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/charge-no-change-when-simulating-voltage-dependent-transmission\/"},"modified":"2024-09-09T07:27:00","modified_gmt":"2024-09-09T07:27:00","slug":"charge-no-change-when-simulating-voltage-dependent-transmission","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/charge-no-change-when-simulating-voltage-dependent-transmission\/","title":{"rendered":"CHARGE: No change when Simulating Voltage-Dependent Transmission"},"content":{"rendered":"<p>&lt;p&gt;Hi Sir\/Madam,&lt;\/p&gt;&lt;p&gt;I am reproducing the work titled &#8220;Tunable all-dielectric metasurface for phase modulation of the reflected and transmitted light via permittivity tuning of indium tin oxide.&#8221; I simulated the structure using Lumerical Charge and placed an ID monitor (Linear z) to obtain a plot showing the relationship between applied voltage and carrier concentration. Additionally, I used the NP attribute to convert the change in carrier concentration into a refractive index change. After simulating the unit cell, I obtained a plot that matches the results shown in the original paper. However, when I run the parameter sweep of applied voltage vs. transmission, I see no change, whereas in the original paper, there is a change in both the transmission coefficient and transmission phase. I am unsure where the issue lies.&lt;\/p&gt;&lt;p&gt;While attempting to resolve this problem, I checked the NP attribute, but I am unable to control the Z and Z span. In the unit cell, I placed the charge monitor in two locations in Lumerical Charge to observe how the carrier concentration varies with applied voltage and, consequently, the refractive index. At one location, the Z and Z spans are 0.212 &mu;m and 0.024 &mu;m, while at the other, they are 0.391 &mu;m and 0.31 &mu;m. However, in the NP attribute, the Z and Z spans are fixed at 0 and 1 for both regions. Even if I attempt to change them, the Z span defaults back to 1 &mu;m.&lt;\/p&gt;&lt;p&gt;Can anyone guide me on this issue?&lt;\/p&gt;&lt;p&gt;Kind regards,&lt;br&gt;Bharathy&lt;\/p&gt;&lt;hr&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/09\/09-09-2024-1725866556-Screenshot 2024-09-09 125055.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/09\/09-09-2024-1725866588-Screenshot 2024-09-09 125145.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;The attached first image is what I get and the below one is what is shown in the original paper.&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-381888","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["302729","2592"],"_bbp_author_ip":["103.232.241.182"],"_btv_view_count":["130"],"_bbp_topic_status":["unanswered"],"_bbp_likes_count":["1"],"_bbp_topic_id":["381888"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","302729"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["382345"],"_bbp_last_active_id":["382345"],"_bbp_last_active_time":["2024-09-11 15:10:46"]},"test":"ph23resch01002iith-ac-in"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/381888","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\/381888\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=381888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}