Title: Fabrication and Optical Properties of Gold Semishells
Authors: Ye, Jian ×
Van Dorpe, Pol
Van Roy, Willem
Lodewijks, Kristof
De Vlaminck, Iwijn
Maes, Guido
Borghs, Gustaaf #
Issue Date: Feb-2009
Publisher: Amer chemical soc
Series Title: Journal of physical chemistry c vol:113 issue:8 pages:3110-3115
Abstract: Gold (Au) nanoshells are known to exhibit many attractive optical properties caused by the excitation of localized surface plasmon resonances (LSPRs). Reducing the symmetry of these nanoshells has a number of interesting consequences, such as exciting different plasmon modes, making the optical response angle-dependent, and enhancing the local electric field intensity. In this paper, a versatile procedure involving ion milling has been developed to fabricate reduced-symmetrical Au semishells. This allows us to precisely control the reduced-symmetrical geometry and, particularly, the upward orientation of the created nanoaperture. These features, along with a combination of finite different time domain (FDTD) calculations, suggest Au semishell monolayer structures for a potential application in surface-enhanced Raman spectroscopy (SERS)-based biomolecule detection. Au semishells, additionally, exhibit advantageous features over Au nanoshells, for example, a more pronounced red shift of LSPR bands by tuning the aspect ratio, a larger tuning range of optical properties, increased optical absorption at higher wavelengths, and an enhanced local electromagnetic field.
ISSN: 1932-7447
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Associated Section of ESAT - INSYS, Integrated Systems
Physics and Astronomy - miscellaneous
Semiconductor Physics Section
Quantum Chemistry and Physical Chemistry Section
× corresponding author
# (joint) last author

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