A5075427316- Optical Wireless Communication Technologies
- Advanced ceramic materials synthesis
- Semiconductor Lasers and Optical Devices
- Thermal properties of materials
- Solar Thermal and Photovoltaic Systems
- solar cell performance optimization
- Impact of Light on Environment and Health
- Thermal Radiation and Cooling Technologies
- Spectroscopy and Laser Applications
- Photovoltaic System Optimization Techniques
- Photonic and Optical Devices
- GaN-based semiconductor devices and materials
- Power Line Communications and Noise
- MXene and MAX Phase Materials
- Radiative Heat Transfer Studies
- Boron and Carbon Nanomaterials Research
- Calibration and Measurement Techniques
- Advanced Photonic Communication Systems
- Silicon and Solar Cell Technologies
- Nuclear materials and radiation effects
- Laser-Ablation Synthesis of Nanoparticles
- Smart Parking Systems Research
- Silicon Nanostructures and Photoluminescence
- Maritime Transport Emissions and Efficiency
- Thermal Expansion and Ionic Conductivity
National Institute of Optics
2015-2025
University of Florence
2023
National Research Council
2016-2023
Piaggio Aerospace (Italy)
2022
Piaggio (Italy)
2022
Instituto de Óptica "Daza de Valdés"
2021
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2017
Abstract Energy sustainability and interconnectivity are the two main pillars on which cutting‐edge architecture is based require realization of energy intelligent devices that can be fully integrated into buildings, capable meeting stringent regulatory requirements operating in real‐world conditions. Luminescent solar concentrators, particularly those near‐infrared emitting reabsorption‐free quantum dots, considered good candidates for semi‐transparent photovoltaic glazing, but despite...
We investigate the optical properties of LaB6 - based materials, as possible candidates for solid absorbers in Concentrating Solar Power (CSP) systems. Bulk materials were thermally consolidated by hot pressing starting from commercial powders. To assess solar absorbance and spectral selectivity properties, room-temperature hemispherical reflectance spectra measured ultraviolet to mid-infrared, considering different compositions, porosities surface roughnesses. Thermal emittance at around...
Abstract Fluorescent Concentrators (FCs) are set to revolutionize Optical Wireless Communications (OWC), offering significant advantages over traditional receivers, such as large Field of View (FoV) and enhanced optical gain (OG). In this study, three different Antennas presented evaluated OWC exploiting FCs incorporating fluorophores. The performances DQ1 Lumogen Red 305F (LR305), a newly synthesized fluorophore (H2) comparatively tested for solar energy harvesting, never proposed before...
Intelligent Transportation Systems (ITS) aim at integration of innovative technologies in next-generation vehicles order to increase the safety and efficiency standards vehicular traffic fluxes. Although many sensors are currently available modern cars, mutual data exchange between real-time will be crucial future smart vehicles, but this domain, particular bidirectional Vehicle-to-Vehicle (V2V) through Visible Light Communications (VLC), remain relatively unexplored yet. In paper we present...
Abstract Fluorescent concentrators (FCs) have been recently proposed as optical condensers for visible light communications (VLC) and wireless communication (OWC) receivers, with advantages over conventional stages in terms of gain field view (FoV). However, the use FC‐based receivers real‐world scenarios is hampered by need large resilience involved chromophores to sunlight exposure, availability large‐area FC substrates suitable optochemical properties. This paper presents an innovative...
In this paper, we present very recent results regarding the latency characterization of a novel bidirectional visible light communication (VLC) system for vehicular applications, which could be relevant in intelligent transportation (ITS) safety such as assisted and automated braking cars motorbikes critical situations. The VLC has been implemented using real motorbike head- tail-lights with distances up to 27 m realistic outdoor scenario. We performed detailed statistical analysis observed...
One of the main challenges in deployment visible light communication (VLC) realistic application fields, such as intelligent transportation systems (ITSs), is represented by presence large background noise levels on top optical signal carrying digital information. A versatile and effective filtering technique is, hence, crucial to face an issue way. In this paper, we present extensive experimental evaluation a complete VLC system, embedding software-defined-radio (SDR)-based processing (DSP)...
Visible light communication (VLC) is currently recognized as a relevant technology for wealth of possible application scenarios. New classes services can be designed in both outdoor and indoor environments, exploiting the directionality optical channel low attainable latencies. Such features allow VLC to offer spatial localization users wireless by using widespread high-power LEDs simultaneous illumination information sources. In scenario, one most promising deployments expected museums,...
Abstract The increased demand for high‐speed (terabit‐per‐second) wireless data transmission has driven the shift of frequency carrier from ubiquitous radio systems toward 1–5 THz range, triggering a new interest quantum cascade laser (QCL)‐based free‐space optical (FSO) links. As compared to standard telecom‐band FSO links, platforms based on sources are inherently robust against Rayleigh scattering. Atmospheric absorption, mainly due water vapor, limits achievable link distance but at same...
It is a known rule that the efficiency of thermodynamic solar plants increases with working temperature. At present, main limit in temperature upscaling absorber capability to withstand high temperatures. The ideal works at temperatures and has both low thermal emissivity absorptivity spectral range. present work reports on preparation optical characterization hafnium zirconium diboride ultrahigh-temperature ceramics for innovative absorbers operating Spectral hemispherical reflectance from...
Spectral emittance is a key topic in the study of new compositions, depositions, and mechanical machining materials for solar absorption renewable energies general. The present work reports on realization testing experimental facility measurement directional spectral range 2.5–20 μm. Our setup provides information completely controlled environment at medium-high temperatures up to 1200 K. We describe layout first tests device, comparing results obtained hafnium carbide tantalum diboride...
Concentrating Solar Power (CSP) is considered to be one of the most promising and sustainable technologies for electricity production in future, as efficiency solar thermal systems rapidly increases with increasing working temperature, big challenge future develop novel solutions receivers. In this framework, Ultra-High Temperature Ceramics (UHTCs) are mainly studied protection materials aerospace military applications, but their peculiar properties (very high melting points good...
Optical Antennas (OAs) based on Fluorescent Concentrators (FCs) promise a revolution in the deployment of Visible Light Communication (VLC) and Wireless (OWC), due to their inherent advantages over conventional receivers terms exceedingly larger field view (FoV) optical gain (OG). Whilst FC-based OAs have been demonstrated VLC applications wealth works embedding monochromatic UV Blue LED sources, detailed study demonstrating performances OA white-light (WLC) applications, which is at basis...
In the present study, nearly fully dense monolithic ZrC samples are produced and broadly characterized from microstructural, mechanical optical points of view. Specifically, 98% products obtained by Spark Plasma Sintering (SPS) after 20 min dwell time at 1850 °C starting powders preliminarily prepared Self-propagating High-temperature Synthesis (SHS) followed ball milling. A prolonged treatment up to 2 h SHS does not lead appreciable benefits. Vickers hardness resulting (17.5 ± 0.4 GPa) is...
A laser-based "green" synthesis of nanoparticles (NPs) was used to manufacture gold NPs in water. The light source is a Ti:Sapphire laser with 30 fs FWHM pulses, 800 nm mean wavelength, and 1 kHz repetition rate. method involves two stages: (1) pulsed ablation liquids (2) photo-fragmentation (PF). Highly pure well-dispersed diameter 18.5 that can be stored at room temperature without showing any agglomeration over period least 3 months were produced the need use stabilizer. Transmittance...
Traffic signaling is an emerging field for light-emitting diode (LED) applications. This sustainable power-saving illumination technology can be used in maritime thanks to the recently updated norms, where possibility utilize LED sources explicitly cited, and availability of high-power white LEDs that, combined with suitable lenses, permit us obtain well-collimated beams. paper describes optical design a LED-based lamp that replace traditional authentic marine lighthouse. source recombines...