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Arbitrary Form Plasmonic Structures: Optical Realization, Numerical Analysis and Demonstration Applications

Quang Cong Tong, Fei Mao, Mai Hoang Luong, Minh Thanh Do, Rasta Ghasemi, Tran Quoc Tien, Tho Duc Nguyen and Ngoc Diep Lai, INTECH book chapter, Book "Plasmonics", 65-85 (2018)

Surface plasmon resonance has attracted more and more attention thanks to its wide range of applications in numerous fields (physics, chemistry, biology, etc.). In this chapter, we present different aspects, from theoretical calculation and experimental fabrication to applications demonstration, related to arbitrary shape plasmonic nanostructures. First, numerical calculations based on finite-difference time-domain method were realized to investigate the plasmonic properties of gold nanostructures having various size and shapes. Then the direct laser writing method was demonstrated as an excellent tool for fabrication on demand of arbitrary nanostructures. Plasmonic structures were obtained indirectly by a standard lift-off method from a polymeric template and directly by tightly focusing a continuous-wave laser beam onto a metallic thin film. Finally, demonstration of various applications of fabricated plasmonic structures, namely plasmonic-based data storage, color nanoprinter, tunable filters, and plasmonic-magneto-optics sensors will be shown.

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Acknowledgments
This work is a joint research between the LPQM (ENS Cachan, France), the Institute of Materials Science (IMS, VAST), Vietnam, the University of Georgia (USA).
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