Optical Resonances in Short-Range Ordered Nanoholes in Ultrathin Aluminum/Aluminum Nitride Multilayers
Journal article, 2013
Nanoholes with short-range ordering were fabricated in ultrathin aluminum/aluminum nitride multilayer films where each layer is as thin as a few nanometers. Optical resonances of the trilayer system with a single metallic layer and five-layer system with two metallic layers were successfully tuned in the visible-near-infrared (vis/NIR) range. The resonance wavelength as well as the width can be predicted and designed by solving the dispersion relation and comparing with the lateral dimension of the short-range ordering. To solve the dispersion relation, we developed a general formulation for multilayer systems. The thermal stability of the fabricated nanoholes in ultrathin multilayers was also tested by vacuum annealing the samples up to 400 degrees C. While no structural change of the nanohole or the multilayer surface has been observed, the optical property showed almost no change in the resonance confirming no structural change but emergence of the interband transition!
lithography
1986
subwavelength hole arrays
gold-films
applied optics
v25
surface-plasmon resonance
metal-films
miryont h
transmission
aluminum
nanostructures
sensors
particle
p1311
Author
Y. Ikenoya
Tokyo Institute of Technology
M. Susa
Tokyo Institute of Technology
J. Shi
Tokyo Institute of Technology
Y. Nakamura
Tokyo Institute of Technology
Andreas Dahlin
Chalmers, Applied Physics, Bionanophotonics
T. Sannomiya
Tokyo Institute of Technology
Journal of Physical Chemistry C
1932-7447 (ISSN) 1932-7455 (eISSN)
Vol. 117 12 6373-6382Subject Categories
Materials Engineering
Chemical Sciences
DOI
10.1021/jp401372k