Highly tunable elastic dielectric metasurface lenses
Abstract
Dielectric metasurfaces are two-dimensional structures composed of nano-scatterers that manipulate the phase and polarization of optical waves with subwavelength spatial resolution, thus enabling ultra-thin components for free-space optics. While high performance devices with various functionalities, including some that are difficult to achieve using conventional optical setups have been shown, most demonstrated components have fixed parameters. Here, we demonstrate highly tunable dielectric metasurface devices based on subwavelength thick silicon nano-posts encapsulated in a thin transparent elastic polymer. As proof of concept, we demonstrate a metasurface microlens operating at 915 nm, with focal distance tuning from 600 μm to 1400 μm (over 952 diopters change in optical power) through radial strain, while maintaining a diffraction limited focus and a focusing efficiency above 50%. The demonstrated tunable metasurface concept is highly versatile for developing ultra-slim, multi-functional and tunable optical devices with widespread applications ranging from consumer electronics to medical devices and optical communications.
Additional Information
© 2016 by Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Issue online: 22 November 2016; Version of record online: 3 November 2016; Manuscript Accepted: 20 October 2016; Manuscript Revised: 14 October 2016; Manuscript Received: 2 June 2016. This work was supported by the DOE "Light-Material Interactions in Energy Conversion" Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Award no. de-sc0001293. E.A., A.A., and Y.H. were supported by Samsung Electronics. The device nanofabrication was performed at the Kavli Nanoscience Institute at Caltech.Attached Files
Submitted - 1604.03597v1.pdf
Supplemental Material - lpor201600144-sup-0001-SupMat.pdf
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Additional details
- Eprint ID
- 66564
- Resolver ID
- CaltechAUTHORS:20160430-100552297
- Department of Energy (DOE)
- DE-SC0001293
- Samsung Electronics
- Created
-
2016-05-01Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Kavli Nanoscience Institute, Institute for Quantum Information and Matter