Tuning the Thickness and Orientation of Single Au Pyramids for Improved Refractive Index Sensitivities.

Tuning the Thickness and Orientation of Single Au Pyramids for Improved Refractive Index Sensitivities.
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DOI:
10.1021/jp8111155
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发表时间:
2009-02-12
期刊:
The journal of physical chemistry. C, Nanomaterials and interfaces
影响因子:
--
通讯作者:
Odom TW
Odom TW
中科院分区:
其他
文献类型:
--
作者:
Lee J;Hasan W;Odom TW

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This paper describes three ways to tune the multipolar surface plasmon resonances of Au pyramidal particles: (1) by varying their thickness; (2) by controlling their relative orientation on a surface; and (3) by changing the refractive index of the surrounding media. We found that as the index of the medium was increased that the plasmon resonances red-shifted linearly from visible to near infrared wavelengths. By screening the different geometric parameters, we found that 25-nm thick pyramids in a tip-up orientation produced the largest refractive index sensitivities.
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