2026-09-19T05:57:10Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1227432021-07-05T14:03:20Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Rajeev J. Ram and Federico Capasso.
Zaidi, Muhammad Aun Abbas.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2019-11-04T20:22:06Z
2019-11-04T20:22:06Z
2019
2019
https://hdl.handle.net/1721.1/122743
1124762613
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).
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.
by Muhammad Aun Abbas Zaidi.
S.M.
S.M. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
92 pages
eng
Massachusetts Institute of Technology
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.
http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
Polarization control and measurement with meta-optics
Thesis
application/pdf
2019-11-04T20:22:05Z
Publication
Master
EECS
unknown
unknown
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<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>
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