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Optical Trapping, Biosensing, and Spectroscopy in a Single Plasmonic Platform

Published online by Cambridge University Press:  12 January 2012

Arif E. Cetin ,
Cihan Yilmaz ,
Ahmet Yanik ,
Sivasubramanian Somu ,
Ahmed Busnaina  and
Hatice Altug
Arif E. Cetin
Affiliation:
Department of Electrical and Computer Engineering, and Photonics Center, Boston University, Boston, Massachusetts 02215, USA
Cihan Yilmaz
Affiliation:
NSF Nanoscale Science and Engineering Center for High-rate Nanomanufacturing, Northeastern University, Boston, Massachusetts 02215, USA
Ahmet Yanik
Affiliation:
Department of Electrical and Computer Engineering, and Photonics Center, Boston University, Boston, Massachusetts 02215, USA
Sivasubramanian Somu
Affiliation:
NSF Nanoscale Science and Engineering Center for High-rate Nanomanufacturing, Northeastern University, Boston, Massachusetts 02215, USA
Ahmed Busnaina
Affiliation:
NSF Nanoscale Science and Engineering Center for High-rate Nanomanufacturing, Northeastern University, Boston, Massachusetts 02215, USA
Hatice Altug
Affiliation:
Department of Electrical and Computer Engineering, and Photonics Center, Boston University, Boston, Massachusetts 02215, USA
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Abstract

We propose plasmonic platform that can enable optical trapping, spectroscopy and biosensing, all in the same platform. The system is based on periodic arrays of gold nanopillars fabricated on a supporting gold layer. The proposed platform is highly desirable for biosensing applications since it supports highly refractive index sensitivities as large as 675 nm/RIU which. The spectrally sharp resonances provides large figure of merits as large as 112.5. As the nanopillar array supports large near-field intensities accessible to the biomolecules in the sample around the platform, as large as 10.000 times, the proposed structure can be used for surface enhanced spectroscopy applications. The pillar array also supports plasmonic hot spots with high near-field intensity gradient leading to large gradient forces, 350 pN/W/μm2 which is needed for optical trapping applications.

Keywords

biologicalRaman spectroscopynanoscale
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1414: Symposium HH – Bioelectronics#x2013;Materials, Properties and Applications , 2012 , mrsf11-1414-hh05-06
Copyright
Copyright © Materials Research Society 2012

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References

REFERENCES

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