2019 21st International Conference on Transparent Optical Networks (ICTON)
We will present results that demonstrate squeezed light source based on Four Wave Mixing (FWM) in... more We will present results that demonstrate squeezed light source based on Four Wave Mixing (FWM) in hot Potassium vapor. Squeezed light with the noise level of -6 dB below standard quantum limit is observed in the difference signal between correlated probe and conjugate beams, generated via FWM in potassium vapor. The vapor is contained in the vacuum K cell. For generating FWM we use nearly co-propagating pump and probe beam in a double Λ atomic scheme, which is similar to schemes used to demonstrate sqeezing in KD and in K. Obtained level of squeezing is improvement from the previous results for squeezing in potassium.
Lifetimes have been deduced from beam-foil decay curves for 6GaI terms, 7GaIII terms, 7 Tl I term... more Lifetimes have been deduced from beam-foil decay curves for 6GaI terms, 7GaIII terms, 7 Tl I terms, and 2 Tl III terms. The results are compared with numerical Coulomb approximation calculations as well as with previous experimental and theoretical data and discussed. There is generally good agreement between experiment and the numerical Coulomb approximation.
Spectroscopic and laser relevant investigations comprising three main topics are summarized. The ... more Spectroscopic and laser relevant investigations comprising three main topics are summarized. The topics discussed are: (1) study of the luminescence arising from the interaction of ions with atoms and molecules, and of atoms sputtered from a solid target; (2) combined mass spectrometric and light spectroscopic space resolved studies of the excitation of radiative levels of various charge states in a
Spectroscopic and laser relevant investigations comprising three main topics are summarized. The ... more Spectroscopic and laser relevant investigations comprising three main topics are summarized. The topics discussed are: (1) study of the luminescence arising from the interaction of ions with atoms and molecules, and of atoms sputtered from a solid target; (2) combined mass spectrometric and light spectroscopic space resolved studies of the excitation of radiative levels of various charge states in a
Nuclear Instruments and Methods in Physics Research, 1982
Abstract Relative level excitations in Ga I–III and Tl I–III have been studied as functions of th... more Abstract Relative level excitations in Ga I–III and Tl I–III have been studied as functions of the projectile velocity and the quantum numbers of the excited terms. A discussion of the excitation mechanism data is given.
Journal of Physics B: Atomic and Molecular Physics, 1981
... References Ali MA 1978 J. Quant. Spectrosc. Radiat. Transfer 20 565-7 Andersen T 1980 unpubli... more ... References Ali MA 1978 J. Quant. Spectrosc. Radiat. Transfer 20 565-7 Andersen T 1980 unpublished work. Andersen T, Bentzen S M and Poulsen 0 1980 Phys. Scr. 22 119-22 Andersen T, Jessen KA and S~rensen G 1969 Phys. Rev. 188 76-81 Berry H G 1975 Phys. Scr. ...
ABSTRACT Metallic copper Cu and bimetallic copper–silver CuAg nanoparticles (NPs) are generated b... more ABSTRACT Metallic copper Cu and bimetallic copper–silver CuAg nanoparticles (NPs) are generated by the ablation of copper bulk target in water and aqueous Ag colloidal solution, respectively. The experiments were performed using nanosecond Nd:YAG laser operating at 1064nm. The generated NPs are characterized by UV–vis absorption spectroscopy, laser-induced breakdown spectroscopy, dynamic light scattering and scanning electron microscopy. The conducted investigations can be summarized as follows: (i) CuAg NPs colloidal solution possess the absorption in UV–vis spectral region, which can be attributed to the Cu-component; (ii) the primary bimetallic CuAg NPs have near uniform dimensions with diameter of about 15nm, and as a rule, they are grouped into larger agglomerates without defined morphology; (iii) the obtained Cu NPs have mainly spherical form with average diameters up to 20nm. Both types of NPs show a tendency towards the formation of large agglomerates with different morphology. Bimetallic NPs show the plasmon resonance in the vicinity of 640nm with a good coincidence with formation of the colloidal solution of pure Cu NPs. The results also demonstrate that the core–shell structure (Ag-rich core/Cu-rich shell) is important for the formation of the bimetallic NPs, also agreeing very well with theory.
2019 21st International Conference on Transparent Optical Networks (ICTON)
We will present results that demonstrate squeezed light source based on Four Wave Mixing (FWM) in... more We will present results that demonstrate squeezed light source based on Four Wave Mixing (FWM) in hot Potassium vapor. Squeezed light with the noise level of -6 dB below standard quantum limit is observed in the difference signal between correlated probe and conjugate beams, generated via FWM in potassium vapor. The vapor is contained in the vacuum K cell. For generating FWM we use nearly co-propagating pump and probe beam in a double Λ atomic scheme, which is similar to schemes used to demonstrate sqeezing in KD and in K. Obtained level of squeezing is improvement from the previous results for squeezing in potassium.
Lifetimes have been deduced from beam-foil decay curves for 6GaI terms, 7GaIII terms, 7 Tl I term... more Lifetimes have been deduced from beam-foil decay curves for 6GaI terms, 7GaIII terms, 7 Tl I terms, and 2 Tl III terms. The results are compared with numerical Coulomb approximation calculations as well as with previous experimental and theoretical data and discussed. There is generally good agreement between experiment and the numerical Coulomb approximation.
Spectroscopic and laser relevant investigations comprising three main topics are summarized. The ... more Spectroscopic and laser relevant investigations comprising three main topics are summarized. The topics discussed are: (1) study of the luminescence arising from the interaction of ions with atoms and molecules, and of atoms sputtered from a solid target; (2) combined mass spectrometric and light spectroscopic space resolved studies of the excitation of radiative levels of various charge states in a
Spectroscopic and laser relevant investigations comprising three main topics are summarized. The ... more Spectroscopic and laser relevant investigations comprising three main topics are summarized. The topics discussed are: (1) study of the luminescence arising from the interaction of ions with atoms and molecules, and of atoms sputtered from a solid target; (2) combined mass spectrometric and light spectroscopic space resolved studies of the excitation of radiative levels of various charge states in a
Nuclear Instruments and Methods in Physics Research, 1982
Abstract Relative level excitations in Ga I–III and Tl I–III have been studied as functions of th... more Abstract Relative level excitations in Ga I–III and Tl I–III have been studied as functions of the projectile velocity and the quantum numbers of the excited terms. A discussion of the excitation mechanism data is given.
Journal of Physics B: Atomic and Molecular Physics, 1981
... References Ali MA 1978 J. Quant. Spectrosc. Radiat. Transfer 20 565-7 Andersen T 1980 unpubli... more ... References Ali MA 1978 J. Quant. Spectrosc. Radiat. Transfer 20 565-7 Andersen T 1980 unpublished work. Andersen T, Bentzen S M and Poulsen 0 1980 Phys. Scr. 22 119-22 Andersen T, Jessen KA and S~rensen G 1969 Phys. Rev. 188 76-81 Berry H G 1975 Phys. Scr. ...
ABSTRACT Metallic copper Cu and bimetallic copper–silver CuAg nanoparticles (NPs) are generated b... more ABSTRACT Metallic copper Cu and bimetallic copper–silver CuAg nanoparticles (NPs) are generated by the ablation of copper bulk target in water and aqueous Ag colloidal solution, respectively. The experiments were performed using nanosecond Nd:YAG laser operating at 1064nm. The generated NPs are characterized by UV–vis absorption spectroscopy, laser-induced breakdown spectroscopy, dynamic light scattering and scanning electron microscopy. The conducted investigations can be summarized as follows: (i) CuAg NPs colloidal solution possess the absorption in UV–vis spectral region, which can be attributed to the Cu-component; (ii) the primary bimetallic CuAg NPs have near uniform dimensions with diameter of about 15nm, and as a rule, they are grouped into larger agglomerates without defined morphology; (iii) the obtained Cu NPs have mainly spherical form with average diameters up to 20nm. Both types of NPs show a tendency towards the formation of large agglomerates with different morphology. Bimetallic NPs show the plasmon resonance in the vicinity of 640nm with a good coincidence with formation of the colloidal solution of pure Cu NPs. The results also demonstrate that the core–shell structure (Ag-rich core/Cu-rich shell) is important for the formation of the bimetallic NPs, also agreeing very well with theory.
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