A simple Mie-resonator based meta-array with diverse deflection scenarios enabling multifunctional operation at near-infrared
| Autor: | Ekmel Ozbay, Majid Aalizadeh, Andriy E. Serebryannikov, Guy A. E. Vandenbosch |
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| Přispěvatelé: | Aalizadeh, Majid, Özbay, Ekmel |
| Rok vydání: | 2020 |
| Předmět: |
Technology
deflection spatial filtering EFFICIENT Physics::Optics 02 engineering and technology DIFFRACTION METASURFACES 01 natural sciences Nanomaterials WIDE-ANGLE ABSORPTION Physics Mie resonance Spatial filter GRATINGS 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Physical Sciences Multifunctionality Science & Technology - Other Topics 0210 nano-technology mie resonance Biotechnology REFLECTION meta-array TRANSMISSION splitting QC1-999 Materials Science Materials Science Multidisciplinary Physics Applied 010309 optics Resonator Optics multifunctionality Deflection (engineering) 0103 physical sciences Nanoscience & Nanotechnology multi-functionality Electrical and Electronic Engineering Science & Technology BROAD-BAND business.industry Near-infrared spectroscopy MODES business |
| Zdroj: | Nanophotonics, Vol 9, Iss 15, Pp 4589-4600 (2020) Nanophotonics |
| ISSN: | 2192-8614 2192-8606 |
| DOI: | 10.1515/nanoph-2020-0386 |
| Popis: | Deflection, a basic functionality of wavefront manipulation is usually associated with the phase-gradient metasurfaces and the classical blazed gratings. We numerically and experimentally demonstrate an unusually wideband and simultaneously wide-angle deflection achieved at near-infrared in reflection mode for a periodic (nongradient), ultrathin meta-array comprising only one silicon nanorod (Mie resonator) per period. It occurs in the range where only the first negative diffraction order and zero order may propagate. Deflection serves as the enabler for multifunctional operation. Being designed with the main goal to obtain ultra-wideband and wide-angle deflection, the proposed meta-array is also capable in spatial filtering and wide-angle splitting. Spatial filtering of various types can be obtained in one structure by exploiting either deflection in nonzero diffraction orders, or the specular-reflection (zero-order) regime. Thus, the role of different diffraction orders is clarified. Moreover, on–off switching of deflection and related functionalities is possible by changing polarization state of the incident wave. The suggested device is simple to fabricate and only requires cost-effective materials, so it is particularly appropriate for the large-area fabrication using nanoprint lithography. Ultra-wideband wide-angle and other deflection scenarios, along with the other functionalities, are promising for applications in optical communications, laser optics, sensing, detection, and imaging. |
| Databáze: | OpenAIRE |
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