Abstract
The ability to detect and differentiate between left and right-handed biopolymers has important biosensing applications. Although this can be done using circular dichroism (CD), the CD signal is usually weak. To amplify it, plasmonic nanostructures can be used. This paper presents a simulation study of the use of a planar array of cubic nanostructures, demonstrating the switching of chirality through performing geometric transformations. It has been found that when the cubes are rotated about their vertical axis and when the angles φ and θ of incident light are varied, CD can be observed, and performing the opposite action results in the switching of CD. As the use of cubes as compared to other structures, such as the chiral gammadion structure in reported works, has the merit of being easier to fabricate, the methods described in this paper have much potential in being used to detect chiral biopolymers.
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Acknowledgements
Zhu Xiuhua would like to extend her sincerest gratitude to her research mentor, Dr. Khoo, for his guidance and support.
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Zhu, X., Khoo, E.H. (2019). Demonstration of Switching Plasmonic Chirality via Geometric Transformations for Biosensing Applications. In: Guo, H., Ren, H., Bandla, A. (eds) IRC-SET 2018. Springer, Singapore. https://doi.org/10.1007/978-981-32-9828-6_12
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DOI: https://doi.org/10.1007/978-981-32-9828-6_12
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