Enhanced sensing of molecular optical activity with plasmonic nanohole arrays

• DOI: 10.1364/josab.34.000315
• Publication Date: 2017-01-09T15:54:51Z
• Authors: Maxim V. Gorkunov; Alexander N. Dari...; Alexey V. Kondratov
• Keywords: Condensed Matter - Mesoscale and Nanoscale Physics; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); FOS: Physical sciences; 02 engineering and technology; 0210 nano-technology; Physics - Optics; Optics (physics.optics)

Prospects of using metal hole arrays for the enhanced optical detection molecular chirality in nanosize volumes are investigated. Light transmission through holes filled with an optically active material is modeled and activity enhancement by more than order magnitude demonstrated. The spatial resolution shown to be a few tens nanometers. From comparing effect cylindrical complex chiral shape, it concluded that sensitivity determined plasmonic near field enhancement. intrinsic due their shape appears less important.