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Reconfigurable all-dielectric metalens with diffraction-limited performance
- Source :
- Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021), Nature Communications
- Publication Year :
- 2021
- Publisher :
- Nature Portfolio, 2021.
-
Abstract
- Active metasurfaces, whose optical properties can be modulated post-fabrication, have emerged as an intensively explored field in recent years. The efforts to date, however, still face major performance limitations in tuning range, optical quality, and efficiency, especially for non-mechanical actuation mechanisms. In this paper, we introduce an active metasurface platform combining phase tuning in the full 2π range and diffraction-limited performance using an all-dielectric, low-loss architecture based on optical phase change materials (O-PCMs). We present a generic design principle enabling binary switching of metasurfaces between arbitrary phase profiles and propose a new figure-of-merit (FOM) tailored for reconfigurable meta-optics. We implement the approach to realize a high-performance varifocal metalens operating at 5.2 μm wavelength. The reconfigurable metalens features a record large switching contrast ratio of 29.5 dB. We further validate aberration-free and multi-depth imaging using the metalens, which represents a key experimental demonstration of a non-mechanical tunable metalens with diffraction-limited performance.<br />Here, the authors report an active all-dielectric metasurface platform based on phase change materials, combining phase tuning in the full 2π range, and demonstrate aberration-free and multi-depth imaging with a non-mechanical tunable metalens.
- Subjects :
- Diffraction
Computer science
Science
Phase (waves)
FOS: Physical sciences
General Physics and Astronomy
Applied Physics (physics.app-ph)
02 engineering and technology
01 natural sciences
Electro-optics
Article
General Biochemistry, Genetics and Molecular Biology
010309 optics
0103 physical sciences
Electronic engineering
Multidisciplinary
business.industry
Metamaterial
Physics - Applied Physics
General Chemistry
021001 nanoscience & nanotechnology
Optical phenomena
Metamaterials
Contrast ratio
Photonics
0210 nano-technology
business
Electron-beam lithography
Optics (physics.optics)
Sub-wavelength optics
Physics - Optics
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 12
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....537cb13a48bab9fddfcdd9a49c4d06d4