Planar immersion lens with metasurfaces
Abstract
The solid immersion lens is a powerful optical tool that allows light entering material from air or a vacuum to focus to a spot much smaller than the free-space wavelength. Conventionally, however, the lenses rely on semispherical topographies and are nonplanar and bulky, which limits their integration in many applications. Recently, there has been considerable interest in using planar structures, referred to as metasurfaces, to construct flat optical components for manipulating light in unusual ways. Here, we propose and demonstrate the concept of a planar immersion lens based on metasurfaces. The resulting planar device, when placed near an interface between air and dielectric material, can focus electromagnetic radiation incident from air to a spot in the material smaller than the free-space wavelength. As an experimental demonstration, we fabricate an ultrathin and flexible microwave lens and further show that it achieves wireless energy transfer in material mimicking biological tissue.
Additional Information
© 2015 American Physical Society. Received 15 September 2014; revised manuscript received 5 March 2015; published 30 March 2015.Attached Files
Published - PhysRevB.91.125145.pdf
Submitted - 1503.03825v1.pdf
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Additional details
- Eprint ID
- 56913
- Resolver ID
- CaltechAUTHORS:20150423-102357253
- Created
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2015-04-23Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field