A5054747291- Organic Electronics and Photovoltaics
- Thin-Film Transistor Technologies
- Nonlinear Optical Materials Studies
- Fullerene Chemistry and Applications
- ZnO doping and properties
- Photonic Crystals and Applications
- Conducting polymers and applications
- Nanofabrication and Lithography Techniques
- Photonic and Optical Devices
- Optical Coatings and Gratings
- Porphyrin and Phthalocyanine Chemistry
- Nonlinear Optical Materials Research
- Diamond and Carbon-based Materials Research
- Molecular Junctions and Nanostructures
- Plasmonic and Surface Plasmon Research
- Semiconductor materials and devices
- Nanomaterials and Printing Technologies
- Luminescence and Fluorescent Materials
- Synthesis and properties of polymers
- Nanowire Synthesis and Applications
- Liquid Crystal Research Advancements
- Metamaterials and Metasurfaces Applications
- Advanced Sensor and Energy Harvesting Materials
- Polymer Surface Interaction Studies
- Transition Metal Oxide Nanomaterials
National Institute of Materials Physics
2015-2024
University of Bucharest
2011
Material Physics Center
2010
Indium tin oxide (ITO) thin films were grown on nanopatterned glass substrates by the pulsed laser deposition (PLD) technique. The was carried out at 1.2 J/cm2 fluence, low oxygen pressure (1.5 Pa) and unheated substrate. Arrays of periodic pillars with widths ~350 nm, heights ~250 separation pitches ~1100 nm fabricated using UV nanoimprint lithography (UV-NIL), a simple, cost-effective, high throughput technique used to fabricate nanopatterns large areas. In order emphasize influence...
As metasurfaces begin to find industrial applications there is a need develop scalable and cost-effective fabrication techniques which offer sub-100 nm resolution while providing high throughput large area patterning. Here we demonstrate the use of UV-Nanoimprint Lithography Deep Reactive Ion Etching (Bosch Cryogenic) towards this goal. Robust processes are described for silicon rectangular pillars pattern fidelity. To quality structures, metasurface lenses, diffraction limited focusing...
This study presents the design and manufacture of metasurface lenses optimized for focusing light with 1.55 µm wavelength. The are fabricated on silicon substrates using electron beam lithography, ultraviolet-nanoimprint lithography cryogenic deep reactive-ion etching techniques. designed makes use geometrical phase principle consists rectangular pillars target dimensions height h = 1200 nm, width w 230 length l 354 nm periodicity p 835 nm. simulated efficiency lens is 60%, while master...
This paper presents a study of two monomeric structures containing functional groups with different electronegativities [NH/NH-NH and NO2] polymeric prepared by the copolymerisation maleic anhydride methylmethacrylate/maleic vinyl benzyl chloride, subsequent functionalization 2,4 dinitroaniline. Thin films have been Matrix Assisted Pulsed Laser Evaporation (MAPLE) UV-VIS, FTIR, Raman Photoluminescence Spectroscopy used to comparatively investigate properties synthesised compounds. We...
Abstract We simulated numerically and demonstrated experimentally that the thermal emittance of a metasurface consisting an array rectangular metallic meta-atoms patterned on layered periodic dielectric structure grown top layer can be tuned by changing several parameters. The resonance frequency, designed to in near-infrared spectral region, modifying number periods, polarization incidence angle incoming radiation. In addition, absorbance/emittance value at resonant wavelength orientation...
Abstract Environmentally-friendly bio-organic materials have become the centre of recent developments in organic electronics, while a suitable interfacial modification is prerequisite for future applications. In context researches on low cost and biodegradable resource optoelectronics applications, influence 2D nanostructured transparent conductive electrode morphological, structural, optical electrical properties nucleobases (adenine, guanine, cytosine, thymine uracil) thin films obtained...
Nanocomposite films based on macrocyclic compounds (zinc phthalocyanine (ZnPc) and 5,10,15,20-tetra(4-pyridyl) 21H,23H-porphyrin (TPyP)) metal oxide nanoparticles (ZnO or CuO) were deposited by matrix-assisted pulsed laser evaporation (MAPLE). 1,4-dioxane was used as a solvent in the preparation of MAPLE targets that favor deposition with low roughness, which is key feature for their integration structures optoelectronic applications. The influence addition ZnO (~20 nm size) CuO (~5...