Inverse-Designed Broadband All-Dielectric Electromagnetic Metadevices
Abstract
This paper presents a platform combining an inverse electromagnetic design computational method with additive manufacturing to design and fabricate all-dielectric metadevices. As opposed to conventional flat metasurface-based devices that are composed of resonant building blocks resulting in narrow band operation, the proposed design approach creates non-resonant, broadband (Δλ/λ up to >50%) metadevices based on low-index dielectric materials. High-efficiency (transmission >60%), thin (≤2λ) metadevices capable of polarization splitting, beam bending, and focusing are proposed. Experimental demonstrations are performed at millimeter-wave frequencies using 3D-printed devices. The proposed platform can be readily applied to the design and fabrication of electromagnetic and photonic metadevices spanning microwave to optical frequencies.
- Publication:
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Scientific Reports
- Pub Date:
- January 2018
- DOI:
- 10.1038/s41598-018-19796-y
- arXiv:
- arXiv:1706.08486
- Bibcode:
- 2018NatSR...8.1358C
- Keywords:
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- Physics - Applied Physics