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Near-field local enhancement by ordered arrays of sub-wavelength scattering centers fabricated by femtosecond ablation.
- Source :
-
Applied Physics B: Lasers & Optics . Apr2011, Vol. 103 Issue 1, p51-55. 5p. 1 Color Photograph, 2 Graphs. - Publication Year :
- 2011
-
Abstract
- We show how the ultrafast laser inscription of nanodimple arrays enables near-field local enhancement in high refractive-index crystals. We first demonstrate both experimentally and numerically how, when two nanodimples are separated by intermediate distances (700-1000 nm), near-field interference can take place resulting in a near-field enhancement between nanodimples. Based on this effect, near-field enhancements close to 60% are then demonstrated at the center of nanodimple arrays, and strong optical contrasts in excess of 100% are produced. The integration of these arrays into crystal substrates provides a versatile tool for new optical trapping and evanescent-field nanosensing devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09462171
- Volume :
- 103
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Applied Physics B: Lasers & Optics
- Publication Type :
- Academic Journal
- Accession number :
- 59984467
- Full Text :
- https://doi.org/10.1007/s00340-010-4218-0