Abstract
We fabricate samples of aluminum ultrathin films with hexagonal nanohole arrays and characterize the transmission performance. High optical transmittance larger than 60% over a broad wavelength range from 430 nm to 750 nm is attained experimentally. The Fano-type resonance of the excited surface plasmon plaritons and the directly transmitted light attribute to both of the broadband transmission enhancement and the transmission suppression dips. © 2016 Optical Society of America.
Original language | English (US) |
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Pages (from-to) | 4680 |
Journal | Optics Express |
Volume | 24 |
Issue number | 5 |
DOIs | |
State | Published - Feb 24 2016 |