Single-Layer Metasurface with Controllable Multiwavelength Functions
| Autor: | Michele Tamagnone, Kundan Chaudhary, Alexander Y. Zhu, Charles Roques-Carmes, Yao-Wei Huang, Cheng-Wei Qiu, Mohammadreza Khorasaninejad, Robert C. Devlin, Zhujun Shi, Vyshakh Sanjeev, Zhao-Wei Ding, Federico Capasso, Wei Ting Chen |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
business.industry Mechanical Engineering Holography Phase (waves) Bioengineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Polarization (waves) 01 natural sciences law.invention 010309 optics Wavelength Optics Primary color law Achromatic lens 0103 physical sciences Dispersion (optics) RGB color model General Materials Science 0210 nano-technology business |
| Zdroj: | Nano Letters. 18:2420-2427 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | In this paper, we report dispersion-engineered metasurfaces with distinct functionalities controlled by wavelength. Unlike previous approaches based on spatial multiplexing or vertical stacking of metasurfaces, we utilize a single phase profile with wavelength dependence encoded in the phase shifters' dispersion. We designed and fabricated a multiwavelength achromatic metalens (MAM) with achromatic focusing for blue (B), green (G), yellow (Y), and red (R) light and two wavelength-controlled beam generators (WCBG): one focuses light with orbital angular momentum (OAM) states ( l = 0,1,2) corresponding to three primary colors; the other produces ordinary focal spots ( l = 0) for red and green light, while generating a vortex beam ( l = 1) in the blue. A full color (RGB) hologram is also demonstrated in simulation. Our approach opens a path to applications ranging from near-eye displays and holography to compact multiwavelength beam generation. |
| Databáze: | OpenAIRE |
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