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5 October 2015 Modeling and engineering of three-dimensional chiroplasmonic silver nano structures (Presentation Recording)
Junhong Deng, Fan Bai, Jack Ng, Zhifeng Huang
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Proceedings Volume 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII; 95471K (2015) https://doi.org/10.1117/12.2187345
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States
Abstract
Fabrication of 3D chiral nanoplasmonic structures is always challenging, while the principles for their chiroptical properties are still ambiguous. We will present a combined experimental and theoretical study on 3D chiroplasmonic activity of silver nanospirals (AgNSs), fabricated on sapphire by low temperature glancing angle deposition. AgNSs exhibit bisignated CD spectra in the UV-visible range, in the form of not only individual AgNSs or an array. Compared to individual AgNSs, the array of AgNSs show CD with an intensity 3 order of magnitude higher. It is demonstrated the engineering of chiroplasmonic CD via adjusting spiral parameters, including spiral pitches, number of turns and handedness. Finite element simulations were performed and are in good agreement with the experiments. A LC theory is also employed to explain the difference of chiroplasmonic CD in the UV and visible region.
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Junhong Deng, Fan Bai, Jack Ng, and Zhifeng Huang "Modeling and engineering of three-dimensional chiroplasmonic silver nano structures (Presentation Recording)", Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 95471K (5 October 2015); https://doi.org/10.1117/12.2187345
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KEYWORDS
3D modeling
Silver
Nanolithography
Nanoplasmonic structures
Sapphire
Ultraviolet radiation
Visible radiation
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