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Ultra Sensitive Surface-Enhanced Raman Scattering Detection Using Uniform Sub-5 nm Gap Optical Antennas

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Abstract

Arch-dipole optical antennas with uniform 5nm gaps have been fabricated on Si substrate using deep-UV “spacer” lithography. Strong surface-enhanced Raman scattering (SERS) signals with an enhancement factor of 1.1×108 have been measured.

© 2012 Optical Society of America

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