Translation of nanoantenna hot spots by a metal-dielectric composite superlens

Zhengtong Liu, Purdue University - Main Campus
Mark D. Thoreson, Birck Nanotechnology Center, Purdue University
Alexander V. Kildishev, Birck Nanotechnology Center, School of ECE
V. M. Shalaev, Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University

Date of this Version



DOI: 10.1063/1.3176975

This document has been peer-reviewed.



We employ numerical simulations to show that highly localized, enhanced electromagnetic fields, also known as "hot spots," produced by a periodic array of silver nanoantennas can be spatially translated to the other side of a metal-dielectric composite superlens. The proposed translation of the hot spots enables surface-enhanced optical spectroscopy without the undesirable contact of molecules with metal, and thus it broadens and reinforces the potential applications of sensing based on field-enhanced fluorescence and surface-enhanced Raman scattering.


Engineering | Nanoscience and Nanotechnology