Title :
Near infrared surface plasmon resonance of gold nanoring based plasmonic crystals for sensor applications
Author :
Jiang, Hao ; Sabarinathan, Jayshri
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, ON, Canada
Abstract :
Plasmonic crystal structures based on periodic arrays of gold nanorings were fabricated on glass substrates and studied by transmission measurements and by finite difference time domain simulations. Transmission measurement results, which closely match the simulation results, show two surface plasmon resonance peaks in the near infrared spectrum range and the peaks can be tuned by changing the lattice constants of the arrays. Using simulations, we investigated the quantitative performance of the sensor. The results show a sensitivity of 537 nm/RIU in bulk sensing applications and 1.6 nm spectral shift for 1 nm change in coating thickness on the surface of the gold nanorings in affinity sensing applications.
Keywords :
coatings; finite difference time-domain analysis; glass; gold; infrared spectra; lattice constants; nanostructured materials; optical arrays; optical sensors; phononic crystals; spectral line shift; surface plasmon resonance; Au; SiO2; bulk sensing applications; coating thickness; finite difference time domain simulations; glass substrates; gold nanoring; lattice constants; near-infrared surface plasmon resonance; periodic arrays; plasmonic crystal structures; sensor applications; spectral shift; transmission measurements; wavelength 537 nm; Crystals; Finite difference methods; Glass; Gold; Infrared sensors; Infrared spectra; Periodic structures; Plasmons; Resonance; Time measurement; finite difference time domain; gold nanoring; plasmonic crystal; surface plasmon resonance;
Conference_Titel :
Nanotechnology, 2009. IEEE-NANO 2009. 9th IEEE Conference on
Conference_Location :
Genoa
Print_ISBN :
978-1-4244-4832-6
Electronic_ISBN :
1944-9399
