Production and characterization of multilayered one dimensional plasmonic nanowires

Download

index.pdf

Date

2017

Author

Aygün, Ezgi

Metadata

Show full item record

Item Usage Stats

85
views

34
downloads

In this study, the main objective is to obtain enhanced optical properties from low dimensional nanostructures via tailoring their plasmonic properties. As the low dimensional multilayered plasmonic structures bear hybrid plasmon modes due to plasmon mixing, some of these modes are found to be subject to very low attenuation, resulting in long range and long lifetime plasmons. Such nanostructures have the potential to be utilized as efficient light management interfaces in thin film photovoltaic devices or as low-loss interconnects in integrated photonic circuitry. For this purpose, a novel geometry was designed composed of one dimensional (1D) metal/dielectric multilayers. Scattering spectra of multilayered nanostructures depend strongly on the thicknesses of the layers. Atomic layer deposition (ALD) technique was used to deposit thin titanium dioxide (TiO2) spacer layers on high aspect ratio polyol synthesized core silver nanowires. The ALD process was optimized by investigating the compositional, morphological, optical, and electrical properties of the deposited thin films using various characterization techniques. A thin layer of silver on top of TiO2 coated silver nanowires serves as a coaxial outer layer facilitating plasmon hybridization. The optical characterization of the resultant nanowires indicates that the plasmonic response of 1D coaxial nanowires of metaldielectric-metal multilayers can be tuned by tailoring the constituent layers. In this study, we showed that it is possible to generate new hybridized plasmon modes in 1D multilayered nanowires.

Subject Keywords

Nanowires., Titanium dioxide., Atomic layer deposition., Nanostructured materials.

URI

http://etd.lib.metu.edu.tr/upload/12621345/index.pdf
https://hdl.handle.net/11511/26635

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Implementation and characterization of an absorption filter for on-chip fluorescent imaging Yıldırım, Ender; Arpali, Serap Altay (2017-04-01) Here we present fabrication and characterization of an absorption filter with superior roll-on properties and precisely tunable cut-off wavelengths for fluorescent imaging applications in lab-on-a-chip systems. The filters were fabricated by spinning dye doped photopolymer (Orasol Yellow in Norland Optical Adhesive 60) on glass substrates. The fabrication technique allowed us to precisely tune the cut-off wavelength of the filters. We showed that filters with different cut-off in the range of 386 nm-504 nm ...
Development of software for calculations of the reflectance, transmittance and absorptance of multilayered thin films Şimşek, Yusuf; Esendemir, Akif; Department of Physics (2008) The aim of this study is to develop a software which calculates reflection, transmission and absorption of multilayered thin films by using complex indices of refraction, as a function of both wavelength and thickness. For these calculations matrix methods will be considered and this software is programmed with the matrix method. Outputs of the program will be compared with the theoretical and experimental results studied in the scientific papers.
Characterization of chiral metamaterial sensor with high sensitivity Dalgac, Sekip; BAKIR, MEHMET; KARADAĞ, FARUK; ÜNAL, EMİN; KARAASLAN, MUHARREM; Sabah, Cumali (Elsevier BV, 2020-02-01) In this study, a chiral metamaterial sensor applications are created by placing asymmetrically two meander line front and back side of the substrate layer. Characterization of the dielectric constant, thickness and loss tangent have been performed both in simulation and experimental methods. Different Arlon type materials used for showing the effects of dielectric constant on transmission coefficient. Obtained bandwidths for characterization are greater than the similar studies which verifyies increased sen...
Preparation and thermal characterization of poly(2-vinylpyridine) copolymers coordinated to Cr nanoparticles Öztürk, Yurdagül; Kayran, Ceyhan; Hacaloğlu, Jale (2015-06-01) In this study, polystyrene-block-poly(2-vinylpyridine), PS-b-P2VP, polyisoprene-block-poly(2-vinylpyridne), PI-b-P2VP and poly(methyl metacrylate)-block-poly(2-vinylpyridine), PMMA-b-P2VP, coordinated to Cr metal were synthesized and characterized by Fourier transform infrared, transmission electron microscopy and direct pyrolysis mass spectrometry techniques. Both thermal degradation mechanism and thermal stability of P2VP blocks were affected by the coordination of Cr nanoparticles to nitrogen of pyridine...
Synthesis, functionalization and characterization of gold nanoparticles Sholanbayeva, Zhanar; Nalbant Esentürk, Emren; Durucan, Caner; Department of Micro and Nanotechnology (2012) Metallic nanoparticles (NPs) with various elemental composition, size, shape and physical or chemical properties has become active field of research. Among all the metal NPs noble metal ones are receiving much attention due to their special optical properties which make them useful for different applications. Noble metal NPs have bright colors resulting from strong surface plasmon resonance absorption usually in the visible region. The colors are size and shape dependent and provide the tuning of optical pr...

Citation Formats

E. Aygün, “Production and characterization of multilayered one dimensional plasmonic nanowires,” M.S. - Master of Science, Middle East Technical University, 2017.