A5039908081- Ocular and Laser Science Research
- Laser-induced spectroscopy and plasma
- Laser Material Processing Techniques
- Laser Design and Applications
- Solid State Laser Technologies
- Nonlinear Optical Materials Studies
- Cultural Heritage Materials Analysis
- Building materials and conservation
- Surface Roughness and Optical Measurements
- ZnO doping and properties
- Conservation Techniques and Studies
- High-Temperature Coating Behaviors
Foundation for Research and Technology Hellas
2005-2024
FORTH Institute of Electronic Structure and Laser
2010-2011
The formation of laser-induced periodic surface structures (LIPSS) on a TiO2 (0 0 1) oriented upon irradiation with UV-fs laser pulses was analyzed. Two systems low spatial frequency LIPSS (LSFL) perpendicular to the direction polarization are observed after N = 5 pulses. One developed edges crater created by first pulse, while other appeared in center and spread towards edges. When greater than 10, two merge. Both LSFL have period approximately 200 nm due coherent superposition waves...
The ultraviolet (UV) laser irradiation (248 nm) of monocrystalline wurtzite ZnO with 450 fs pulses results in surface modification. A formation two orthogonal ripple structures a period 400-500 nm was observed oriented parallel and perpendicular to the beam polarization. UV exciton emission obtained on irradiated domains is found greatly enhanced locally up ~103 times. photoluminescence band redshifted by 2-3 40% narrower (full width at half-maximum), while same time E2(439 cm−1) Raman...
Modifications of shallow electron trap states near conduction band was analyzed after surface structuring TiO2 thin films prepared via pulsed laser deposition method. Laser-induced periodic structures (LIPSS) were produced on the large-area irradiation with femtosecond KrF (λ = 248 nm). While spatial period LIPSS Λ ≈ 190 ± 10 nm not affected by fluence, coherence increased an increase dose. Time-resolved microwave conductivity measurements accompanied theoretical modelling revealed energetic...
Ophthalmology is entering a very interesting period with new diffractive multifocals, improved refractive and accommodative lenses, all coming out at the same time. A diffractive‐refractive design for providing intermediated vision apodization. In an apodized pattern, physical step heights are reduced in height, almost continuously varying manner. This study aimed to investigate use of ultrashort laser pulses ablate surface intraocular thus provide alternative conventional techniques....