Narrow groove plasmonic nano-gratings for surface plasmon resonance sensing
| Autor: | Michael Canva, Anuj Dhawan, Tuan Vo-Dinh |
|---|---|
| Přispěvatelé: | Fitzpatrick Institute of Photonics (FIP), Duke University [Durham], Laboratoire Charles Fabry de l'Institut d'Optique / Biophotonique, Laboratoire Charles Fabry de l'Institut d'Optique (LCFIO), Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
ocis:(260.2110) Electromagnetic optics
Materials science ocis:(050.1755) Computational electromagnetic methods ocis:(240.6680) Surface plasmons Physics::Optics 02 engineering and technology Biosensing Techniques ocis:(260.3910) Metal optics 01 natural sciences 010309 optics Optics Biopolymers 0103 physical sciences Nanotechnology Surface plasmon resonance Rigorous coupled-wave analysis Plasmon Total internal reflection [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ocis:(160.4236) Nanomaterials ocis:(280.4788) Optical sensing and sensors business.industry Surface plasmon Equipment Design Surface Plasmon Resonance 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Nanostructures Equipment Failure Analysis Refractometry Angle of incidence (optics) Research-Article 0210 nano-technology business Refractive index Localized surface plasmon |
| Zdroj: | Optics Express Optics Express, Optical Society of America-OSA Publishing, 2011, 19 (2), pp.787-813 |
| ISSN: | 1094-4087 |
| Popis: | International audience; We present a novel surface plasmon resonance (SPR) configuration based on narrow groove (sub-15 nm) plasmonic nanogratings such that normally incident radiation can be coupled into surface plasmons without the use of prism-coupling based total internal reflection, as in the classical Kretschmann configuration. This eliminates the angular dependence requirements of SPR-based sensing and allows development of robust miniaturized SPR sensors. Simulations based on Rigorous Coupled Wave Analysis (RCWA) were carried out to numerically calculate the reflectance - from different gold and silver nano-grating structures - as a function of the localized refractive index of the media around the SPR nano-gratings as well as the incident radiation wavelength and angle of incidence. Our calculations indicate substantially higher differential reflectance signals, on localized change of refractive index in the narrow groove plasmonic gratings, as compared to those obtained from conventional SPR-based sensing systems. Furthermore, these calculations allow determination of the optimal nano-grating geometric parameters - i. e. nanoline periodicity, spacing between the nanolines, as well as the height of the nanolines in the nano-grating - for highest sensitivity to localized change of refractive index, as would occur due to binding of a biomolecule target to a functionalized nano-grating surface |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|