Browsing by Author "Ozel, T."
Now showing items 1-17 of 17
-
Anisotropic Emission from Multilayered Plasmon Resonator Nanocomposites of Isotropic Semiconductor Quantum Dots
(American Chemical Society, 2011-01-19)We propose and demonstrate a nanocomposite localized surface plasmon resonator embedded into an artificial three-dimensional construction. Colloidal semiconductor quantum dots are assembled between layers of metal ... -
Blue quantum electroabsorption modulators based on reversed quantum confined Stark effect with blueshift
(AIP Publishing LLC, 2007-01-02)The authors present the design, growth, fabrication, experimental characterization, and theoretical analysis of blue quantum electroabsorption modulators that incorporate similar to 5 nm thick In0.35Ga0.65N/GaN quantum ... -
Comparative study of electroabsorption in InGaN/GaN quantum zigzag heterostructures with polarization-induced electric fields
(AIP Publishing LLC, 2008-05-19)We present a comparative study on InGaN/GaN quantum zigzag structures embedded in p-i-n diode architecture that exhibit blue-shifting electroabsorption in the blue when an electric field is externally applied to compensate ... -
Highly efficient nonradiative energy transfer mediated light harvesting in water using aqueous CdTe quantum dot antennas
(Optical Society of America, 2010)We present light harvesting of aqueous colloidal quantum dots to nonradiatively transfer their excitonic excitation energy efficiently to dye molecules in water, without requiring ligand exchange. These as-synthesized CdTe ... -
Hyperbolic metamaterials based on quantum-dot plasmon resonator nanocomposites
(Optical Society of America, 2014)We theoretically demonstrate that nanocomposites made of colloidal semiconductor quantum dot monolayers placed between metal nanoparticle monolayers can function as multilayer hyperbolic metamaterials. Depending on the ... -
Non-radiative resonance energy transfer in bi-polymer nanoparticles of fluorescent conjugated polymers
(Optical Society of American (OSA), 2010)This work demonstrates the comparative studies of non-radiative resonance energy transfer in bi-polymer nanoparticles based on fluorescent conjugated polymers. For this purpose, poly[(9,9-dihexylfluorene) (PF) as a donor ... -
Observation of selective plasmon-exciton coupling in nonradiative energy transfer: donor-selective versus acceptor-selective plexcitons
(American Chemical Society, 2013-06)We report selectively plasmon-mediated nonradiative energy transfer between quantum dot (QD) emitters interacting with each other via Forster-type resonance energy transfer (FRET) under controlled plasmon coupling either ... -
On the origin of high quality white light emission from a hybrid organic / inorganic light emitting diode using azide functionalized polyfluorene
(Royal Society of Chemistry, 2008)High quality white light generation with high colour rendering index (CRI) was achieved by integrating a cross-linkable azide functionalized polyfluorene derivative, namely poly[(9,9-dihexylfluorene)-co-alt-(9,9-bis(6-azidohexyl) ... -
Peptide-mediated constructs of quantum dot nanocomposites for enzymatic control of nonradiative energy transfer
(American Chemical Society, 2011)A bottom-up approach for constructing colloidal semiconductor quantum dot (QDot) nanocomposites that facilitate nonradiative Förster-type resonance energy transfer (FRET) using polyelectrolyte peptides was proposed and ... -
Quantum efficiency enhancement in film by making nanoparticles of polyfluorene
(Optical Society of America, 2008)We report on conjugated polymer nanoparticles of polyfluorene that were formed to exhibit higher fluorescence quantum efficiency in film (68%) and reduce undesired emission peak wavelength shifts in film (by 20 nm), compared ... -
Selective enhancement of surface-state emission and simultaneous quenching of interband transition in white-luminophor CdS nanocrystals using localized plasmon coupling
(Institute of Physics Publishing Ltd., 2008)We propose and demonstrate the controlled modification and selective enhancement of surface-state emission in white-luminophor CdS nanocrystals (NCs) by plasmon-coupling them with proximal metal nanostructures. By carefully ... -
Structural tuning of color chromaticity through nonradiative energy transfer by interspacing CdTe nanocrystal monolayers
(American Institute of Physics, 2009-02-09)We proposed and demonstrated architectural tuning of color chromaticity by controlling photoluminescence decay kinetics through nonradiative Forster resonance energy transfer in the heterostructure of layer-by-layer spaced ... -
Tuning shades of white light with multi-color quantum-dot-quantum-well emitters based on onion-like CdSe-ZnS heteronanocrystals
(Institute of Physics Publishing Ltd., 2008)We present white light generation controlled and tuned by multi-color quantum-dot-quantum-well emitters made of onion-like CdSe/ZnS/CdSe core/shell/shell heteronanocrystals integrated on InGaN/GaN light-emitting diodes ... -
Violet to deep-ultraviolet InGaN∕GaN and GaN∕AlGaN quantum structures for UV electroabsorption modulators
(AIP Publishing LLC, 2007)In this paper, we present four GaN based polar quantum structures grown on c-plane embedded in p-i-n diode architecture as a part of high-speed electroabsorption modulators for use in optical communication (free-space ... -
White emitting polyfluorene functionalized with azide hybridized on near-UV light emitting diode for high color rendering index
(Optical Society of America, 2008)We develop and demonstrate high-quality white light generation that relies on the use of a single-type simple conjugated polymer of polyfluorene functionalized with azide groups (PFA) integrated on a near-UV LED platform. ... -
White light generation tuned by dual hybridization of nanocrystals and conjugated polymers
(Institute of Physics Publishing Ltd., 2007)Dual hybridization of highly fluorescent conjugated polymers and highly luminescent nanocrystals (NCs) is developed and demonstrated in multiple combinations for controlled white light generation with high color rendering ... -
White light generation using CdSe/ZnS core–shell nanocrystals hybridized with InGaN/GaN light emitting diodes
(Institute of Physics Publishing Ltd., 2007)We introduce white light generation using CdSe/ZnS core-shell nanocrystals of single, dual, triple and quadruple combinations hybridized with InGaN/GaN LEDs. Such hybridization of different nanocrystal combinations provides ...
