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Metasurfaces with controlled angular phase dispersion

Kamali, Seyedeh Mahsa and Arbabi, Ehsan and Arbabi, Amir and Horie, Yu and Faraon, Andrei (2017) Metasurfaces with controlled angular phase dispersion. In: High Contrast Metastructures VI. Proceedings of SPIE. No.10113. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 101130Q. ISBN 9781510606678. https://resolver.caltech.edu/CaltechAUTHORS:20180628-153415654

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Abstract

Metasurfaces are two-dimensional arrangements of nano-scatterers that enable control of phase, amplitude, and polarization of light with high efficiency and subwavelength resolution. They have enabled diffractive optical elements with enhanced functionalities and performance. Nevertheless, metasurface diffractive optical elements share many of the properties of regular diffractive optical elements. One of these properties is the response of diffractive elements to changing the angle of illumination: if the beam incident on a grating is rotated by an angle, all diffraction orders will rotate by corresponding angles in the same direction. More precisely, because of the constant grating momentum, the change in the sine of all diffraction angles will be equal to the change in the sine of the illumination angle. Many optical devices of interest, however, do not require this type of behavior, which makes their implementation using metasurfaces very challenging. For instance retroreflectors, which reflect light incident from any angle to the same direction, or collimators, that deflect light coming from any angle to a single given direction, do not follow the regular diffractive optics angular response. We investigate properties of single-layer metasurfaces that enable devices like retroreflectors and collimators. We show that such metasurfaces should have the ability to control the phase, as well as the derivative of phase with respect to angle. We demonstrate designs that provide such control, and use them to show devices that defy the regular response of diffractive optical devices to changes in the illumination angle.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2255547DOIArticle
ORCID:
AuthorORCID
Kamali, Seyedeh Mahsa0000-0002-6968-811X
Arbabi, Ehsan0000-0002-5328-3863
Arbabi, Amir0000-0001-8831-7552
Horie, Yu0000-0001-7083-1270
Faraon, Andrei0000-0002-8141-391X
Additional Information:© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:10113
Record Number:CaltechAUTHORS:20180628-153415654
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180628-153415654
Official Citation:Seyedeh Mahsa Kamali, Ehsan Arbabi, Amir Arbabi, Yu Horie, Andrei Faraon, "Metasurfaces with controlled angular phase dispersion (Conference Presentation)", Proc. SPIE 10113, High Contrast Metastructures VI, 101130Q (28 April 2017); doi: 10.1117/12.2255547; https://doi.org/10.1117/12.2255547
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87454
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:03 Jul 2018 18:38
Last Modified:03 Oct 2019 19:56

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