{"action":"closed","issue":{"url":"https://api.github.com/repos/stevengj/meep/issues/484","repository_url":"https://api.github.com/repos/stevengj/meep","labels_url":"https://api.github.com/repos/stevengj/meep/issues/484/labels{/name}","comments_url":"https://api.github.com/repos/stevengj/meep/issues/484/comments","events_url":"https://api.github.com/repos/stevengj/meep/issues/484/events","html_url":"https://github.com/stevengj/meep/issues/484","id":355711041,"node_id":"MDU6SXNzdWUzNTU3MTEwNDE=","number":484,"title":"extend mode decomposition to circularly-polarized modes","user":{"login":"oskooi","id":7152530,"node_id":"MDQ6VXNlcjcxNTI1MzA=","avatar_url":"https://avatars1.githubusercontent.com/u/7152530?v=4","gravatar_id":"","url":"https://api.github.com/users/oskooi","html_url":"https://github.com/oskooi","followers_url":"https://api.github.com/users/oskooi/followers","following_url":"https://api.github.com/users/oskooi/following{/other_user}","gists_url":"https://api.github.com/users/oskooi/gists{/gist_id}","starred_url":"https://api.github.com/users/oskooi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/oskooi/subscriptions","organizations_url":"https://api.github.com/users/oskooi/orgs","repos_url":"https://api.github.com/users/oskooi/repos","events_url":"https://api.github.com/users/oskooi/events{/privacy}","received_events_url":"https://api.github.com/users/oskooi/received_events","type":"User","site_admin":false},"labels":[{"id":88929135,"node_id":"MDU6TGFiZWw4ODkyOTEzNQ==","url":"https://api.github.com/repos/stevengj/meep/labels/enhancement","name":"enhancement","color":"84b6eb","default":true}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2018-08-30T18:53:06Z","updated_at":"2018-12-05T02:09:54Z","closed_at":"2018-12-05T02:09:54Z","author_association":"CONTRIBUTOR","body":"The mode decomposition feature currently only works for linearly-polarized modes. It would be useful to extend this to [circularly-polarized](https://en.wikipedia.org/wiki/Circular_polarization) modes. An example application which would be nice to set up as a tutorial in the documentation is described in [Optics Letters, Vol. 33, No. 20, pp. 2287-9, 2008](https://www.osapublishing.org/ol/abstract.cfm?uri=ol-33-20-2287) [(pdf)](https://www.imagineoptix.com/cms/wp-content/uploads/2017/01/OL_08_Oh-broadband_PG.pdf). This involves a linearly-polarized planewave incident on a 2d slab of [cholesteric liquid crystal](https://en.wikipedia.org/wiki/Cholesteric_liquid_crystal). The transmitted fields are diffracted planewaves at various angles with left or right circular polarization. The mode coefficients of these circularly-polarized modes could be used to calculate the diffraction efficiency of each order."}}
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