A5009087445- Advanced Thermoelectric Materials and Devices
- Laser-Matter Interactions and Applications
- Laser Material Processing Techniques
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Spacecraft and Cryogenic Technologies
- Mass Spectrometry Techniques and Applications
- Transition Metal Oxide Nanomaterials
- Spectroscopy and Quantum Chemical Studies
- Optical Network Technologies
- Gas Sensing Nanomaterials and Sensors
- Advanced Thermodynamic Systems and Engines
- TiO2 Photocatalysis and Solar Cells
- Optical Coatings and Gratings
- Thermal Radiation and Cooling Technologies
- Advanced biosensing and bioanalysis techniques
- Nanoparticle-Based Drug Delivery
- Advanced Photocatalysis Techniques
- Magnetic and Electromagnetic Effects
- Metal-Organic Frameworks: Synthesis and Applications
- Hydrogen Storage and Materials
- Thermal Regulation in Medicine
- Building Energy and Comfort Optimization
- Phase Change Materials Research
Universidade Estadual de Campinas (UNICAMP)
2024
Politecnico di Milano
2018-2024
University of Aveiro
2020-2022
Shibaura Institute of Technology
2022
University of Genoa
2022
Istituto di Fotonica e Nanotecnologie
2018
National Research Council
2018
Universidade Nova de Lisboa
2011-2017
We demonstrate the generation of few-cycle deep ultraviolet pulses via frequency upconversion 5-fs near-infrared in argon using a laser-fabricated gas cell. The measured spectrum extends from 210 to 340 nm, corresponding transform-limited pulse duration 1.45 fs. extract dispersion-free second-order cross-correlation measurement 1.9 fs, defining new record spectral range.
We describe a beamline where few-femtosecond ultraviolet (UV) pulses are generated and synchronized to few-cycle near-infrared (NIR) extreme (XUV) attosecond pulses. The UV light is obtained via third-harmonic generation in argon or neon gas when focusing phase-stabilized NIR driving field inside glass cell that was designed support high pressures for enhanced conversion efficiency. A recirculation system allows reducing the large consumption required nonlinear process. Isolated using...
This work explores how, by redox-sensitive substitutions, the thermoelectric properties of oxides can be tuned and enhanced.
The energetics and phase behavior of the MIL-53(Al) metal–organic framework upon low-temperature (15–260 K), subatmospheric H2 adsorption are studied experimentally using a volumetric technique theoretically by grand canonical Monte Carlo simulation. equilibrium data recorded for fixed amount in system at stable increasing temperature steps starting from 15 K while recording pressure attained each step. isotherms generated repeating experiments different amounts adsorbate connecting points...
This paper reports a novel composite-based processing route for improving the electrical performance of Ca3Co4O9 thermoelectric (TE) ceramics. The approach involves addition metallic Co, acting as pore filler on oxidation, and considers two simple sintering schemes. (1-x)Ca3Co4O9/xCo composites (x = 0%, 3%, 6% 9% vol.) have been prepared through modified Pechini method, followed by one- two-stage sintering, to produce low-density (one-stage, 1ST) high-density (two-stage, 2ST) ceramic...
This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation anatase polymorph, by designing phase composition microstructure rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction rutile SiC in inert Ar atmosphere, followed post-oxidation air. impacts conditions on photocatalytic activity were evaluated using Taguchi planning. XRD...
This work seeks possibilities for advancing the thermoelectric oxide technology by exploring a module design involving materials produced laser processing. A tubular generator of modular construction with functional elements located parallel to pipe-shaped heat source was designed and manufactured. The p- n-type counterparts based on Ca3Co4O9 Ca0.95Pr0.05MnO3 were grown floating zone (LFZ) technique, ensuring highly dense microstructures giving unique possibility fast crucible-free...
Weight and size are important features of a cryocooler when it comes to space applications. Given their reliability low level exported vibrations (due the absence moving cold parts), pulse tubes good candidates for spatial purposes miniaturization has been focus many studies. We report on design performance small-scale very high frequency tube prototype, modeled after two previous prototypes which were optimized with numerical code.
Within the European Project TERABOARD, a photonic integration platforms including electronic-photonic is developed to demonstrate high bandwidth high-density modules and cost energy target objectives. Large count density EO interfaces for onboard intra-data center interconnection are reported. For large interconnections novel concept based on optical-TSV platform with no intersections WDM multiplexing All input/output coupler arrays pluggable silica reported as well.
We demonstrate the generation of high-order harmonics in a fused-silica chip produced by femtosecond laser micromachining. This achievement paves way for miniaturization HHG applications from large-scale laboratories to microstructures.
We demonstrate the generation of high-order harmonics in a fused-silica chip produced by femtosecond laser micromachining. This achievement paves way to miniaturization HHG applications from large-scale laboratories microdevices.
In this century of continuous exponential growth communications worldwide, traditional electrical interconnection is finding increasingly difficult to respond the bandwidth pressure, and photonic will most likely be future standard. Planar lightwave circuit (PLC) technology capable high-throughput fabrication low loss waveguides, but in general limited its 2D geometry. On other hand femtosecond direct writing (FDW) provides a solid tool for optical circuits with great flexibility, exploiting...
We demonstrate the generation of high-order harmonics in a fused-silica device fabricated through femtosecond laser micromachining. This achievement paves way for miniaturization HHG applications from large-scale laboratories to microstructures.
Generation of few-femtosecond (fs) pulses in the ultraviolet (UV) is important ultrafast spectroscopy since several bio-relevant molecules, including DNA bases, possess electronic transitions this spectral region [1]. Exploiting nonlinear processes driven by intense laser has led to advances meet challenge. We developed a source delivering 1.9 fs (2.2 cycles at 255 nm) deep-UV with 150 nJ energy on target [2].