Exploring plasmonic coupling in hole-cap arrays

• Thomas M. Schmidt,
• Maj Frederiksen,
• Vladimir Bochenkov and
• Duncan S. Sutherland

Beilstein J. Nanotechnol. 2015, 6, 1–10, doi:10.3762/bjnano.6.1

• . The interesting and complex coupling between caps and hole arrays reveals the details of the field distribution for these simple to fabricate structures. Keywords: caps; colloidal lithography; hybridization; localized surface plasmon resonance; near field; SRO hole arrays; Introduction The

• in Figure 1c. SRO hole arrays fabricated by this approach have been studied in terms of their optical response and been used in sensing applications extensively in recent years [29][30][31][32][33][34]. The arrays of structures of the different sample types studied here are made from the same

• specific colloidal mask pattern giving them identical distributions, see Figure 1d. The structures have a characteristic center to center spacing around 220–250 nm and average diameter of 110 nm with a standard deviation of 5 nm. We explore the plasmonic resonances of SRO hole arrays, cap arrays and