title: Nanosphere templated metallic grating assisted enhanced fluorescence.
abstract: In this paper, enhanced fluorescence from a silver film coated nanosphere templated grating is presented. Initially, numerical simulation was performed to determine the plasmon resonance wavelength by varying the thickness of the silver film on top of a monolayer of 400 nm nanospheres. The simulation results are verified experimentally and tested for enhancing fluorescence from fluorescein isothiocyanate whose excitation wavelength closely matches with the plasmon resonance wavelength of the substrate with 100 nm silver film over nanosphere. The 12 times enhancement in the intensity is attributed to the local field enhancement in addition to the excitation of surface plasmon polaritons along the surface.
authors.affiliation: School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Ravi Kumar
authors.initials: RK
authors.lastname: Kannadorai
authors.forename: U S
authors.initials: US
authors.lastname: Dinish
authors.forename: Chit Yaw
authors.initials: CY
authors.lastname: Fu
authors.forename: Gopalkrishna
authors.initials: G
authors.lastname: Hegde
authors.forename: Malini
authors.initials: M
authors.lastname: Olivo
authors.forename: Anand
authors.initials: A
authors.lastname: Asundi
mesh_terms: D016650:Fluorescein-5-isothiocyanate / Q000737:chemistry; D005453:Fluorescence; D008567:Membranes, Artificial; D054118:Nanospheres / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D008567:Membranes, Artificial; D012834:Silver; D016650:Fluorescein-5-isothiocyanate
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