Nanosphere Templated Metallic Grating Assisted Enhanced Fluorescence

作者：Kannadorai Ravi Kumar; Dinish U S; Fu Chit Yaw; Hegde Gopalkrishna; Olivo Malini; Asundi Anand^*

来源：Journal of Fluorescence, 2012, 22(2): 609-614.

DOI：10.1007/s10895-011-0996-y

• Metal enhanced fluorescence
• Surface plasmons
• Nanosphere monolayer
• Finite-difference time domain method

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.

• 出版日期2012-3
• 单位南阳理工学院