Multipolar Coupling in Hybrid Metal–Dielectric Metasurfaces
- Australian National Univ., Canberra, ACT (Australia)
- Australian National Univ., Canberra, ACT (Australia); Karlsruhe Inst. of Technology (KIT) (Germany)
- Australian National Univ., Canberra, ACT (Australia) ; Friedrich Schiller Univ., Jena (Germany)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Karlsruhe Inst. of Technology (KIT) (Germany)
In this paper, we study functional hybrid metasurfaces consisting of metal–dielectric nanoantennas that direct light from an incident plane wave or from localized light sources into a preferential direction. The directionality is obtained by carefully balancing the multipolar contributions to the scattering response from the constituents of the metasurface. The hybrid nanoantennas are composed of a plasmonic gold nanorod acting as a feed element and a silicon nanodisk acting as a director element. In order to experimentally realize this design, we have developed a two-step electron-beam lithography process in combination with a precision alignment step. Finally, the optical response of the fabricated sample is measured and reveals distinct signatures of coupling between the plasmonic and the dielectric nanoantenna elements that ultimately leads to unidirectional radiation of light.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1265167
- Report Number(s):
- SAND2016--5456J; 644957
- Journal Information:
- ACS Photonics, Journal Name: ACS Photonics Journal Issue: 3 Vol. 3; ISSN 2330-4022
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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