{"id":391014,"date":"2024-10-23T09:54:15","date_gmt":"2024-10-23T09:54:15","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-is-the-purcell-vale-negative\/"},"modified":"2024-10-23T09:54:15","modified_gmt":"2024-10-23T09:54:15","slug":"how-is-the-purcell-vale-negative","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-is-the-purcell-vale-negative\/","title":{"rendered":"how is the Purcell vale negative ?"},"content":{"rendered":"<p>&lt;p&gt;as you can see purcell value given by the dipole has some negative value could you please explain why this is happening as purcell value cant be begative as described in your website (https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360041612594-Purcell-factor-of-a-microdisk) which is just a ratio of powers.&nbsp;&lt;br&gt;also it would be helpful for me to know how you caluculate purcell in the dipole section. I am looking for an answer as soon as possible .thanks for the reply in advance.&nbsp; <img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/23-10-2024-1729677142-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/23-10-2024-1729676891-mceclip0.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-391014","topic","type-topic","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=\"as you can see purcell value given by the dipole has some negative value could you please explain why this is happening as purcell value cant be begative as described in your website (https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360041612594-Purcell-factor-of-a-microdisk) which is just a ratio of powers. also it would be helpful for me to know how you caluculate purcell in the\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-is-the-purcell-vale-negative\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"how is the Purcell vale negative ? 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