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View article: Operation of a fiber-coupled laser-cooler down to cryogenic temperatures: publisher’s note
Operation of a fiber-coupled laser-cooler down to cryogenic temperatures: publisher’s note Open
This publisher’s note contains a correction to [ Opt. Express 30 , 12929 ( 2022 ) 10.1364/OE.448930 ].
View article: Application of a smart dynamic scale for measuring live-fish biomass in aquaculture
Application of a smart dynamic scale for measuring live-fish biomass in aquaculture Open
The need of measuring the fish biomass, either for in-land facilities or offshore cages, drove recently to develop a
\ncheap dynamic scale (by MEGA Materials srl), based on a board of the Arduino family, suitable to measure live-fish weig…
View article: Loss processes on crystal cooling efficiency
Loss processes on crystal cooling efficiency Open
In the perspective of building a solid state cryocooler based on optical refrigeration, it is strategic to develop high purity crystals and to have a full understanding of the mechanisms that can reduce cooling efficiency. In this paper we…
View article: Deep Red Tunability and Output Power Performances of Visible Laser Emission in a Pr:Ba(Y1−xLux)2F8 Single Crystal
Deep Red Tunability and Output Power Performances of Visible Laser Emission in a Pr:Ba(Y1−xLux)2F8 Single Crystal Open
The demand for tunable visible laser sources with high power and high beam quality, for application ranging from metrology to remote sensing, is constantly increasing. In this work, we report on the details of crystal growth, via the Czoch…
View article: First demonstration of optical refrigeration efficiency greater than 4% at room temperature
First demonstration of optical refrigeration efficiency greater than 4% at room temperature Open
In this work, we present the cooling efficiency of a LiYF 4 (lithium yttrium fluoride,YLF) sample co-doped with 10at.% ytterbium (Yb 3+ ) and 0.0040at.% thulium (Tm 3+ ). For the first time at room temperature, the cooling efficiency of a …
View article: Advanced Virgo Status
Advanced Virgo Status Open
The detection of a gravitational wave signal in September 2015 by LIGO interferometers, announced jointly by LIGO collaboration and Virgo collaboration in February 2016, opened a new era in Astrophysics and brought to the whole community a…
View article: Local tuning of WS2 photoluminescence using polymeric micro-actuators in a monolithic van der Waals heterostructure
Local tuning of WS2 photoluminescence using polymeric micro-actuators in a monolithic van der Waals heterostructure Open
The control of the local strain profile in 2D materials offers an invaluable tool for tailoring the electronic and photonic properties of solid-state devices. In this paper, we demonstrate a local engineering of the exciton photoluminescen…
View article: Optical refrigeration: the role of parasitic absorption at cryogenic temperatures
Optical refrigeration: the role of parasitic absorption at cryogenic temperatures Open
Optical cooling of a YLF:Yb single crystal to 87 K, well below the minimum achievable temperature predicted from existing theory, has been observed. This discrepancy between theory and data has motivated us to revisit the current model of …
View article: Microphotoluminescence (μPL) measurements of bidimensional materials in a custom-made setup
Microphotoluminescence (μPL) measurements of bidimensional materials in a custom-made setup Open
The continuously growing interest in the so called bidimensional (2D) materials has been accompanied by a parallel development of techniques specifically devoted to manipulating and measuring micro-sized objects. Here a flexible microphoto…
View article: Calibration of advanced Virgo and reconstruction of the gravitational wave signal <i>h</i> ( <i>t</i> ) during the observing run O2
Calibration of advanced Virgo and reconstruction of the gravitational wave signal <i>h</i> ( <i>t</i> ) during the observing run O2 Open
In August 2017, advanced Virgo joined advanced LIGO for the end of the O2 run, leading to the first gravitational waves detections with the three-detector network. This paper describes the advanced Virgo calibration and the gravitational w…
View article: Calibration of Advanced Virgo and Reconstruction of the Gravitational Wave Signal h(t) during the Observing Run O2
Calibration of Advanced Virgo and Reconstruction of the Gravitational Wave Signal h(t) during the Observing Run O2 Open
In August 2017, Advanced Virgo joined Advanced LIGO for the end of the O2 run, leading to the first gravitational waves detections with the three-detector network. This paper describes the Advanced Virgo calibration and the gravitational w…
View article: Status of Advanced Virgo
Status of Advanced Virgo Open
The LIGO and the Virgo collaborations have recently announced the first detections of Gravitational Waves. Due to their weak amplitude, Gravitational Waves are expected to produce a very small effect on free-falling masses, which undergo a…
View article: Advanced Virgo Status
Advanced Virgo Status Open
The Advanced Virgo project was funded in 2009 with the aim of improving the sensitivity of the Virgo interferometric detector for gravitational waves by a factor of ten, which corresponds to an increase in the detection rate by about three…
View article: Axion dark matter detection by laser induced fluorescence in rare-earth doped materials
Axion dark matter detection by laser induced fluorescence in rare-earth doped materials Open
We present a detection scheme to search for QCD axion dark matter, that is based on a direct interaction between axions and electrons explicitly predicted by DFSZ axion models. The local axion dark matter field shall drive transitions betw…
View article: On a rapidly converging iterative algorithm for diode parameter extraction from a single<i>IV</i>curve
On a rapidly converging iterative algorithm for diode parameter extraction from a single<i>IV</i>curve Open
We measure the I–V curve of a p–n diode on a range of currents where the well known Shockley model exhibits its shortcoming. We show that the behavior of the I–V curve, on the whole range of currents, can be captured by a modified four par…
View article: Laser induced fluorescence for axion dark matter detection: a feasibility study in YLiF$_4$:Er$^{3+}$
Laser induced fluorescence for axion dark matter detection: a feasibility study in YLiF$_4$:Er$^{3+}$ Open
We present a detection scheme to search for QCD axion dark matter, that is based on a direct interaction between axions and electrons explicitly predicted by DFSZ axion models. The local axion dark matter field shall drive transitions betw…
View article: Comparative spectroscopic and thermo-optic study of Tm:LiLnF_4 (Ln = Y, Gd, and Lu) crystals for highly-efficient microchip lasers at ~2 μm
Comparative spectroscopic and thermo-optic study of Tm:LiLnF_4 (Ln = Y, Gd, and Lu) crystals for highly-efficient microchip lasers at ~2 μm Open
We report on a detailed comparative study of the spectroscopic and thermo-optic properties of tetragonal Tm:LiLnF4 (Ln = Y, Gd, and Lu) crystals indicating their suitability for highly-efficient microchip lasers diode-pumped at ~791 nm and…
View article: Investigation of Yb-doped LiLuF<sub>4</sub>single crystals for optical cooling
Investigation of Yb-doped LiLuF<sub>4</sub>single crystals for optical cooling Open
Optical cooling of solids, relying on annihilation of lattice phonons via anti-Stokes fluorescence, is an emerging technology that is rapidly advancing. The development of high-quality Yb-doped fluoride single crystals definitely led to cr…
View article: Circular plate capacitor with different discs
Circular plate capacitor with different discs Open
In this paper, we write a system of integral equations for a capacitor composed of two discs of different radii, generalizing Love’s equation for equal discs. We compute the complete asymptotic form of the capacitance matrix for both large…
View article: Measurements and analysis of current-voltage characteristic of a pn\n diode for an undergraduate physics laboratory
Measurements and analysis of current-voltage characteristic of a pn\n diode for an undergraduate physics laboratory Open
We show that in a simple experiment at undergraduate level, suitable to be\nperformed in classes of science and engineering students, it is possible to\ntest accurately, on a popular 1N4148 p-n diode, the range of the junction\ncurrents wh…
View article: Measurements and analysis of current-voltage characteristic of a pn diode for an undergraduate physics laboratory
Measurements and analysis of current-voltage characteristic of a pn diode for an undergraduate physics laboratory Open
We show that in a simple experiment at undergraduate level, suitable to be performed in classes of science and engineering students, it is possible to test accurately, on a popular 1N4148 p-n diode, the range of the junction currents where…
View article: Circular plate capacitor with different disks
Circular plate capacitor with different disks Open
In this paper we write a system of integral equations for a capacitor composed by two disks of different radii, generalizing Love's equation for equal disks. We compute the complete asymptotic form of the capacitance matrix both for large …
View article: Visible laser operation in a Pr^3+:LiLuF_4 monocrystalline fiber grown by the micro-pulling-down method
Visible laser operation in a Pr^3+:LiLuF_4 monocrystalline fiber grown by the micro-pulling-down method Open
We report on the growth and laser operation of a fiber-shaped single crystal of Pr3+:LiLuF4 (Pr:LLF) grown by the micro-pulling-down (μ-PD) method. We checked the optical quality of the crystal by measuring its spectroscopic features, and …