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Proceedings Paper

Efficient high NA flat micro-lenses realized using high contrast transmitarrays
Author(s): Amir Arbabi; Yu Horie; Alexander J. Ball; Mahmood Bagheri; Andrei Faraon
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Paper Abstract

We present design, fabrication, and characterization results of high numerical aperture (NA) micro-lenses based on a high contrast transmitarray platform. The high contrast transmitarray is created by periodic arrangement of amorphous silicon posts with different diameters on a fused silica substrate. We report near infrared high NA micro-lenses with spot sizes as small as 0.57λ and focusing efficiencies in excess of 80%. We demonstrate a trade-off relation between NA and efficiency of high contrast array flat micro-lenses, and attribute it to the spatial discretization of their phase profiles.

Paper Details

Date Published: 27 February 2015
PDF: 7 pages
Proc. SPIE 9372, High Contrast Metastructures IV, 93720P (27 February 2015); doi: 10.1117/12.2079509
Show Author Affiliations
Amir Arbabi, California Institute of Technology (United States)
Yu Horie, California Institute of Technology (United States)
Alexander J. Ball, California Institute of Technology (United States)
Mahmood Bagheri, Jet Propulsion Lab. (United States)
Andrei Faraon, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 9372:
High Contrast Metastructures IV
Connie J. Chang-Hasnain; David Fattal; Fumio Koyama; Weimin Zhou, Editor(s)

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