A5061481837- Luminescence Properties of Advanced Materials
- Nonlinear Optical Materials Studies
- Thermal Radiation and Cooling Technologies
- Photoacoustic and Ultrasonic Imaging
- Photonic Crystals and Applications
- Plasmonic and Surface Plasmon Research
- Perovskite Materials and Applications
- Photorefractive and Nonlinear Optics
- Topology Optimization in Engineering
- Near-Field Optical Microscopy
- Laser Material Processing Techniques
- Nanoplatforms for cancer theranostics
- Photonic and Optical Devices
- Infective Endocarditis Diagnosis and Management
- Advancements in Photolithography Techniques
- Quantum Dots Synthesis And Properties
- Image Processing Techniques and Applications
- Cardiac Structural Anomalies and Repair
- Luminescence and Fluorescent Materials
- Anodic Oxide Films and Nanostructures
- Advanced Memory and Neural Computing
- Advanced Multi-Objective Optimization Algorithms
- Random lasers and scattering media
- Gold and Silver Nanoparticles Synthesis and Applications
- Cardiac Valve Diseases and Treatments
Aarhus University
2016-2020
Aarhus School of Architecture
2012
In this letter, we present a comparative experimental–simulation study of Au-nanodisc-enhanced upconversion 1500 nm light in an Er3+ doped TiO2 thin film. The geometry the Au nanodiscs was guided by finite-element simulations based on single nanodisc finite computational domain and controlled experimentally using electron-beam lithography. surface-plasmon resonances (SPRs) exhibited well-known spectral red shift with increasing diameter, well explained model. However, observed double-peak...
Upconversion of sunlight with energy below the band gap a solar cell is promising technique for enhancing efficiency, simply by utilizing larger part spectrum. The present topical review addresses this concept and discusses material properties needed an efficient upconversion process focus on both silicon organic cells. To design upconverters, insight into topics such as quantum-optics, nano-optics, numerical modeling, optimization, fabrication, characterization paramount, necessary concepts...
This letter presents a topology optimization study of metal nanostructures optimized for electric-field enhancement in the infrared spectrum. Coupling such with suitable ions allows an increased photon-upconversion yield, one application being solar-cell efficiency by exploiting long-wavelength part solar In this work, is used to design periodic array two-dimensional gold nanostrips enhancements thin film doped upconverting erbium ions. The absorption band utilized simultaneously optimizing...
This paper describes a systematic design study of periodic gold-nanostrip arrays placed on thin film aimed at enhancing the electric field inside when irradiated by light. Based study, "selection rule" is proposed, which provides optimization-based methods with an priori choice between field-enhancement dominated coupling to guided modes, plasmonic near-field enhancement or mix hereof. An appropriate wavelength and grating period shown selectively suppress include waveguiding effects for...
We present the synthesis of Er-doped NaYF4/NaLuF4 core/shell nanocrystal films, which enable optical upconversion photons from a wavelength 1500 nm into 980 nm. Combining such films with specially tailored Au nanostructures and back-reflector, it is demonstrated that luminescence yield can be enhanced up to 31 ± 3 times performance upconverting layer modeled well for broad range excitation conditions. In particular, analysis shows structures corresponds solar concentration factor 4.1 0.6....
Upconversion enhancement of 1500 nm light has been achieved using geometrically optimized Au nano-discs placed in close vicinity Er+3 ions a TiO2 matrix. A finite element modeling is compared to the experimental findings.
We consider the design of individual and periodic arrangements metal or semiconductor nanoparticles for localized electromagnetic field enhancement utilizing a topology optimization based numerical framework as tool. aim at maximizing function amplitude in region space through introduction and/or near region.
First Page