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

Author

• Zhengtong Liu, Purdue UniversityFollow
• Mark D. Thoreson, Birck Nanotechnology Center, Purdue UniversityFollow
• Alexander V. Kildishev, Birck Nanotechnology Center, Purdue UniversityFollow
• V. M. Shalaev, Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue UniversityFollow

Abstract

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.

Keywords

antennas; fluorescence; lenses; silver; surface enhanced Raman scattering, SINGLE-MOLECULE FLUORESCENCE; OPTICAL-PROPERTIES; FRACTAL CLUSTERS; NEAR-FIELD; RESONANCE; NANOPARTICLES; EXCITATION

Citation

DOI: 10.1063/1.3176975

Date of this Version

7-2009

Recommended Citation

Liu, Zhengtong; Thoreson, Mark D.; Kildishev, Alexander V.; and Shalaev, V. M., "Translation of nanoantenna hot spots by a metal-dielectric composite superlens" (2009). Birck and NCN Publications. Paper 446.
https://docs.lib.purdue.edu/nanopub/446