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Hybrid nanoarchitectured core shell plasmonic structures with tunable optical properties

Published online by Cambridge University Press:  27 February 2014

A. A. Khosroabadi ,
P. Gangopadhyay  and
R. A. Norwood
A. A. Khosroabadi
Affiliation:
College of Optical Sciences, The University of Arizona, Tucson, AZ 85721
P. Gangopadhyay
Affiliation:
College of Optical Sciences, The University of Arizona, Tucson, AZ 85721
R. A. Norwood
Affiliation:
College of Optical Sciences, The University of Arizona, Tucson, AZ 85721
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Abstract:

Interest in patterned polymer-based flexible nanodevices and sub-100 nm metal and transparent conducting nanostructured electrodes have led us to modify the traditional nanoimprint lithography technique to enable fabrication of an array of sub-100 nm diameter electrode structures. Transparent conducting electrodes (TCOs) are fabricated by coating one or multiple TCO layers of choice on top of a polymer nanostructured scaffold of appropriate dimension. By optimizing the thickness of each of these layers one may tune and optimize the trade-off between the conductivity and transparency of the sample. Incorporation of plasmonic materials such as Ag leads to interplay of localized and tunable surface plasmon resonances within the TCO structures. At plasmon resonance the reflection of the sample is minimized and absorption in the TCO structures dominates. Experimental and simulated reflection spectra of these structures are in good agreement, including the appearance of sharp spectral features that are absent in a simple planar analog. The simulated Brewster angle of the nanopillars decreases compared to the planar reference sample by up to 10-13 degrees depending on the height of the pillars and indicates a reduced effective refractive index. The depolarization factor obtained by ellipsometry is about 0.05, as anticipated for ellipsoidal pillars.

Keywords

lithography (deposition)nanostructuretransparent conductor
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1627: Symposium L – Photonic and Plasmonic Materials for Enhanced Optoelectronic Performance , 2014 , mrsf13-1627-l09-43
Copyright
Copyright © Materials Research Society 2014 

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References

References:

Atwater, H. A. and Polman, A. “Plasmonics for improved photovoltaic devices” Nature Materials 9, 205–213 (2010).CrossRefGoogle ScholarPubMed
Anker, J. N., Hall, W. P., Lyandres, O., Shah, N. C., Zhao, J. and Duyne, R. P. V. “Biosensing with plasmonic nanosensors” Nature Materials 7, 442–453 (2008).CrossRefGoogle ScholarPubMed
Berkovitch, N., Ginzburg, P. and Orenstein, M. “Nano-plasmonic antennas in the near infrared regime” J. Phys.: Condens. Matter 24, 073202 (2012).Google ScholarPubMed
Polavarapu, L. and Liz-Marzán, L. M. “Towards low-cost flexible substrates for nanoplasmonic sensing” Phys. Chem. Chem. Phys, 15, 5288–5300 (2013).CrossRefGoogle ScholarPubMed
Wurtz, G. A., Pollard, R., Hendren, W., Wiederrecht, G. P., Gosztola, D. J., Podolskiy, V. A. and Zayats, A. V. “Designed ultrafast optical nonlinearity in a plasmonic nanorod metamaterial enhanced by nonlocality” Nature Nanotech, 6, 107 (2011).CrossRefGoogle Scholar
Khosroabadi, A. A., Gangopadhyay, P., Duong, B., Thomas, J., Sigdel, A. K., Berry, J. J., Gennett, T., Peyghambarian, N., and Norwood, R. A., “Fabrication, electrical and optical properties of silver, indium tin oxide (ITO), and indium zinc oxide (IZO) nanostructure arrays” Phys. Status Solidi A, 210, 831 (2013).CrossRefGoogle Scholar
Jundt, D. H., “Temperature-dependent Sellmeier equation for the index of refraction, ne, in congruent lithium niobate,” Optics Letters 22, 1553–1555 (1997).CrossRefGoogle Scholar
Yi, F., Shim, E., Zhu, A. Y., Zhu, H., and Reed, J. C. “Voltage tuning of plasmonic absorbers by indium tin oxide,” Appl. Phys. Lett. 102, 221102 (2013).CrossRefGoogle Scholar
Tilley, R. J. D., Understanding Solids: The Science of Materials, (2nd Edition, ISBN: 978-1-118-42328-8, 2013).Google Scholar
Ghosh, S. K. and Pal, T. “Interparticle coupling effect on the surface plasmon resonance of gold nanoparticles: from theory to applications,” Chem. Rev 107, 4797 (2007).CrossRefGoogle ScholarPubMed
Levy, O. and Stroud, D. “Maxwell Garnett theory for mixtures of anisotropic inclusions:Application to conducting polymers,” Phys. Rev. B 56, 8056 (1997).CrossRefGoogle Scholar
Liang, D., Schmidt, D., Wang, H., Schubert, E., and Schubert, M. ,“Generalized ellipsometry effective medium approximation analysis approach for porous slanted columnar thin films infiltrated with polymer,” Appl. Phys. Lett. 103, 111906 (2013).CrossRefGoogle Scholar
Thomas, J., Gangopadhyay, P., Araci, E., Norwood, R. A., and Peyghambarian, N., “Nanoimprinting by Melt Processing: An Easy Technique to Fabricate Versatile Nanostructures” Adv. Mater 23, 4782 (2011).CrossRefGoogle ScholarPubMed
Cei, W. and Shalaev, V., Optical Metamaterials Fundamentals and Applications (Springer, 2010).Google Scholar
Khosroabadi, A. A., Gangopadhyay, P., Cocilovo, B., Makai, L., Basa, P., Duong, B., Thomas, J., and Norwood, R. A., ”Spectroscopic ellipsometry on metal and metal oxide multi-layer hybrid plasmonic nanostructures,” Optics Letters 38, 3969 (2013).CrossRefGoogle Scholar