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Proceedings Paper

Effect of asymmetrical nanostructures on detecting the optical rotational properties of large biofilament structures
Author(s): Y. J. Liu; S. Wu; D. Popp; Eunice S. P. Leong; Y. L. Hor; W. K. Phua; K. L. Mok; J. H. Teng; R. Robinson; E. P. Li; E. H. Khoo
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Paper Abstract

In this paper, the effect of tapered asymmetrical gammadion on the optical rotational properties and sensitivity detection of biomolecular structures is presented. The asymmetrical structure is made up of gold material on a glass structure and immersed in water. The chirality of the un-rotated array is first determined by measuring the circular dichroism (CD) spectrum. Three modes, arising from Bloch periodic theory and surface resonance mode are observed. Then each asymmetrical gammadion structure is tapered at the arms. Tapering fraction, which define the ratio of tapered end to the untapered end is used for defining the new design. The designs are then fabricated using e-beam lithography and tested using the polarimeter for CD spectra. The spectra show that the three CD modes changes in degree amplitude and wavelength, especially for smaller tapering fractions.

Paper Details

Date Published: 11 September 2013
PDF: 7 pages
Proc. SPIE 8809, Plasmonics: Metallic Nanostructures and Their Optical Properties XI, 88090D (11 September 2013); doi: 10.1117/12.2022947
Show Author Affiliations
Y. J. Liu, A*STAR Institute of Materials Research and Engineering (Singapore)
S. Wu, A*STAR Institute of Materials Research and Engineering (Singapore)
D. Popp, A*STAR Institute of Molecular and Cell Biology (Singapore)
Eunice S. P. Leong, A*STAR Institute of Materials Research and Engineering (Singapore)
Y. L. Hor, A*STAR Institute of High Performance Computing (Singapore)
W. K. Phua, A*STAR Institute of High Performance Computing (Singapore)
K. L. Mok, A*STAR Institute of Molecular and Cell Biology (Singapore)
J. H. Teng, A*STAR Institute of Materials Research and Engineering (Singapore)
R. Robinson, A*STAR Institute of Molecular and Cell Biology (Singapore)
E. P. Li, A*STAR Institute of High Performance Computing (Singapore)
E. H. Khoo, A*STAR Institute of High Performance Computing (Singapore)


Published in SPIE Proceedings Vol. 8809:
Plasmonics: Metallic Nanostructures and Their Optical Properties XI
Mark I. Stockman, Editor(s)

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