{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/122743"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/122743","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Polarization control and measurement with meta-optics","abstract":"Metasurfaces are artificially engineered arrays of subwavelength phase-shifting elements which, if designed with explicit polarization dependence, provide a fascinating platform for new polarization optics. In this thesis, we present metasurface diffraction gratings designed to produce arbitrarily specified polarization states on a set of defined diffraction orders, given that the polarization of the incident beam is known. The metasurface diffraction gratings are designed using gradient-descent optimization, followed by a metasurface specific optimization scheme. We also design and implement a metasurface grating that, when used in the reverse configuration, may be used as a parallel snapshot polarimeter, requiring minimum of standard bulk polarization optics. We demonstrate its use in measuring partially polarized light, and show its performance compares favourably with a commercial polarimeter: for the degree of polarization (DOP) measurements we observed a standard deviation of [sigma]= 1.6% and a mean difference of [mu] = 0.6%, and for the state of polarization (SOP) parameters azimuth [chi] and ellipticity [epsilon], we observe standard deviations of [sigma]= 1.320 and [sigma]= 0.43' respectively. This work is of potential interest in any application requiring compact, lightweight and low cost polarization dependent optics, polarization sensing, or polarization imaging.","abstract_html":"Metasurfaces are artificially engineered arrays of subwavelength phase-shifting elements which, if designed with explicit polarization dependence, provide a fascinating platform for new polarization optics. In this thesis, we present metasurface diffraction gratings designed to produce arbitrarily specified polarization states on a set of defined diffraction orders, given that the polarization of the incident beam is known. The metasurface diffraction gratings are designed using gradient-descent optimization, followed by a metasurface specific optimization scheme. We also design and implement a metasurface grating that, when used in the reverse configuration, may be used as a parallel snapshot polarimeter, requiring minimum of standard bulk polarization optics. We demonstrate its use in measuring partially polarized light, and show its performance compares favourably with a commercial polarimeter: for the degree of polarization (DOP) measurements we observed a standard deviation of [sigma]= 1.6% and a mean difference of [mu] = 0.6%, and for the state of polarization (SOP) parameters azimuth [chi] and ellipticity [epsilon], we observe standard deviations of [sigma]= 1.320 and [sigma]= 0.43' respectively. This work is of potential interest in any application requiring compact, lightweight and low cost polarization dependent optics, polarization sensing, or polarization imaging.","abstract_has_math":false,"creators":["Zaidi, Muhammad Aun Abbas."],"institution":"Massachusetts Institute of Technology","degree_name":"Master","degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science","school":null,"contributors":[],"advisors":["Rajeev J. Ram and Federico Capasso."],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019","date_published":"2019","updated_at":"2026-07-22T22:20:51Z","subjects":["Electrical Engineering and Computer Science."],"languages":["eng"],"rights":["MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1721.1/122743","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Rajeev J. Ram and Federico Capasso."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. 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They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission."]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://dspace.mit.edu/handle/1721.1/7582"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1721.1/122743"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019","Cataloged from PDF version of thesis.","Includes bibliographical references (pages 84-92)."]},{"key":"dc:description.abstract","label":"Abstract","values":["Metasurfaces are artificially engineered arrays of subwavelength phase-shifting elements which, if designed with explicit polarization dependence, provide a fascinating platform for new polarization optics. In this thesis, we present metasurface diffraction gratings designed to produce arbitrarily specified polarization states on a set of defined diffraction orders, given that the polarization of the incident beam is known. The metasurface diffraction gratings are designed using gradient-descent optimization, followed by a metasurface specific optimization scheme. We also design and implement a metasurface grating that, when used in the reverse configuration, may be used as a parallel snapshot polarimeter, requiring minimum of standard bulk polarization optics. We demonstrate its use in measuring partially polarized light, and show its performance compares favourably with a commercial polarimeter: for the degree of polarization (DOP) measurements we observed a standard deviation of [sigma]= 1.6% and a mean difference of [mu] = 0.6%, and for the state of polarization (SOP) parameters azimuth [chi] and ellipticity [epsilon], we observe standard deviations of [sigma]= 1.320 and [sigma]= 0.43' respectively. This work is of potential interest in any application requiring compact, lightweight and low cost polarization dependent optics, polarization sensing, or polarization imaging."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:title","label":"Title","values":["Polarization control and measurement with meta-optics"]}]}],"canonical_facts":{"dc:contributor.advisor":["Rajeev J. Ram and Federico Capasso."],"dc:contributor.department":["Massachusetts Institute of Technology. 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In this thesis, we present metasurface diffraction gratings designed to produce arbitrarily specified polarization states on a set of defined diffraction orders, given that the polarization of the incident beam is known. The metasurface diffraction gratings are designed using gradient-descent optimization, followed by a metasurface specific optimization scheme. We also design and implement a metasurface grating that, when used in the reverse configuration, may be used as a parallel snapshot polarimeter, requiring minimum of standard bulk polarization optics. We demonstrate its use in measuring partially polarized light, and show its performance compares favourably with a commercial polarimeter: for the degree of polarization (DOP) measurements we observed a standard deviation of [sigma]= 1.6% and a mean difference of [mu] = 0.6%, and for the state of polarization (SOP) parameters azimuth [chi] and ellipticity [epsilon], we observe standard deviations of [sigma]= 1.320 and [sigma]= 0.43' respectively. This work is of potential interest in any application requiring compact, lightweight and low cost polarization dependent optics, polarization sensing, or polarization imaging."],"dc:description.degree":["S.M."],"dc:identifier.uri":["https://hdl.handle.net/1721.1/122743"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Electrical Engineering and Computer Science."],"dc:title":["Polarization control and measurement with meta-optics"],"dc:type":["Thesis"],"thesis:degree_name":["Master"]},"updated_at":"2026-07-22T22:20:51Z"}