Journal
ADVANCED MATERIALS
Volume 31, Issue 7, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201806479
Keywords
nonlinear plasmonics; second harmonic generation; vertical split ring resonators (VSRR)
Categories
Funding
- Ministry of Science and Technology, Taiwan [MOST-107-2112-M-001-042-MY3, MOST-107-2923-M-001-010-MY3, MOST-107-2911-I-001-508, MOST-107-2911-I-001-510, MOST-107-2628-E-259-001-MY3, MOST-107-2112-M-003-013-MY3]
- Academia Sinica [AS-TP-108-M12, AS-iMATE-108-41]
- National Center for Theoretical Sciences
- NEMS Research Center of National Taiwan University
- National Center for High-Performance Computing, Taiwan
- Research Center for Applied Sciences, Academia Sinica, Taiwan
- JSPS KAKENHI [JP18H05205]
- Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials (Five-Star Alliance) of MEXT
- Air Force Office of Scientific Research [FA9550-17-1-0354]
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The second harmonic generation (SHG) of vertical and planar split-ring resonators (SRRs) that are broken centro-symmetry configurations at the interface of metal surface and air is investigated. Strong interactions, better electromagnetic field confinements, and less leakage into the substrate for vertical SRRs are found. Experimental results show a 2.6-fold enhancement of SHG nonlinearity, which is in good agreement with simulations and calculations. Demonstrations of 3D metastructures and vertical SRRs with strong SHG nonlinearity majorly result from magnetic dipole and electric quadrupole clearly provides potential applications for photonics and sensing.
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