High Directivity Optical Antenna Substrates for Surface Enhanced Raman Scattering
Dongxing Wang, Wenqi Zhu, Yizhuo Chu, Kenneth B Crozier
ADVANCED MATERIALS | WILEY-V C H VERLAG GMBH | Published : 2012
A two-dimensional array of gold optical antennas integrated with a one-dimensional array of gold strips and mirrors is introduced and fabricated. The experimental results show that this design achieves average surface-enhanced Raman scattering (SERS) enhancement factors as high as 1.2 × 10(10) , which is more than two orders of magnitude larger than optical antennas without the gold strips and gold mirror.
Awarded by National Science Foundation (NSF)
Awarded by U.S. Department of Energy, Office of Science and Office of Basic Energy Sciences
This work was supported in part by the National Science Foundation (NSF, CAREER award, grant # ECCS-0747560) in part by the Harvard Quantum Optics Center, and in part by the Center for Excitonics, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science and Office of Basic Energy Sciences under Award Number DE-SC0001088. Fabrication work was carried out in the Harvard Center for Nanoscale Systems (CNS), which is supported by the NSF.