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Broasca A, Greculeasa M, Voicu F, Hau S, Gheorghe C, Croitoru G, Pavel N, Stanciu G, Petris A, Gheorghe P, Albota F, Serban A, Gheorghe L. LGYSB:Nd─High-Performance Lasing in the Near-Infrared Region. J Am Chem Soc 2024; 146:2196-2207. [PMID: 38214460 DOI: 10.1021/jacs.3c12371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Three incongruent melting LawNdxGdyYzSc4-w-x-y-z(BO3)4 (LGYSB:Nd) crystals with different Y concentrations (z = 0.15, 0.05, and 0.025) have been grown by the Czochralski method for the first time. The LGYSB:Nd-type crystals exhibit an acentric structure similar to that of the natural mineral huntite CaMg3(CO3)4, with space group R32. The composition of the LGYSB:Nd_3 (z = 0.025) crystal grown from the starting melt composition La0.628Gd0.547Y0.025Nd0.05Sc2.75(BO3)4 was measured by inductively coupled plasma mass spectrometry method, and it was found to be La0.6794Gd0.4105Y0.0178Nd0.0381Sc2.8542(BO3)4. The transversal spatial distribution of the refractive index in the LGYSB:Nd_3 crystal was investigated. Third-order nonlinear optical susceptibility χ(3) of the LGYSB:Nd_3 crystal was determined from third-harmonic generation experiments with ultrashort (fs) laser pulses. The optical transmission spectrum was measured in the range of 200-2000 nm. The absorption cross-section at 808 nm in σ-polarization was determined to be 1.18 × 10-19 cm2 for the LGYSB:Nd_3 crystal. The 10K absorption spectra revealed that the Nd3+ ions occupy only La3+ cationic sites in the LGYSB host matrix. The emission cross-section at 1064 nm in σ-polarization was determined to be σem(σ) = 1.74 × 10-19 cm2 for the LGYSB:Nd_3 crystal. The fluorescence lifetime was found to be τ = 115 μs for all of the LGYSB:Nd crystals. The LGYSB:Nd_3 laser was operated at an emission wavelength of 1062 nm with very high slope efficiencies of ηsa = 0.74 and ηsa = 0.64 in quasi-cw and cw regimes, respectively.
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Affiliation(s)
- Alin Broasca
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - Madalin Greculeasa
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
- Doctoral School of Physics, Faculty of Physics, University of Bucharest, 405 Atomistilor, Magurele 077125, Romania
| | - Flavius Voicu
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - Stefania Hau
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - Cristina Gheorghe
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - Gabriela Croitoru
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - Nicolaie Pavel
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - George Stanciu
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - Adrian Petris
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - Petronela Gheorghe
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
| | - Florin Albota
- Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului, Magurele 077125, Romania
| | - Andreea Serban
- Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului, Magurele 077125, Romania
| | - Lucian Gheorghe
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania
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Gheorghe P, Petris A, Anton AM. Optical Limiting Properties of DNA Biopolymer Doped with Natural Dyes. Polymers (Basel) 2023; 16:96. [PMID: 38201761 PMCID: PMC10781093 DOI: 10.3390/polym16010096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/21/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
The high-power lasers have important implications for present and future light-based technologies; therefore, the protection measures against their high-intensity radiation are extremely important. Currently, a great deal of interest is directed towards the development of new nonlinear optical materials for passive optical limiters, which are used to protect the human eye and sensitive optical and optoelectronic devices from laser-induced damage. Biopolymers doped with natural dyes are emerging as a new class of optical materials with interesting photosensitive properties. In this paper, the optical limiting capability of deoxyribonucleic acid bio-polymer functionalized with Turmeric natural dye has been demonstrated for the first time, to the best of our knowledge. The experimental investigation of the optical limit has been done by the Intensity-scan method in the NIR spectral domain at the important telecommunication wavelength of 1550 nm, using ultrashort laser pulses (~120 fs). Several optical properties of this natural dye are presented and discussed. The values of the optical transmittance in the linear regime, the saturation intensity of the nonlinear transmittance curves, and the coefficient of the nonlinear absorption have been determined. The influence of the DNA biopolymer and natural dye concentration on the optical limiting properties of the investigated biomaterials is reported and discussed. The photostability and thermal stability of the investigated solutions have also been evaluated by monitoring the temporal decay of the normalized absorption spectra under illumination with UVA light and heating, respectively. Our results evidence the positive influence of the DNA, which embeds Turmeric natural dye, on the optical limiting functionality itself and on the photostability and thermal stability of this novel material. The performed study reveals the potential of the investigated novel biomaterial for applications in nonlinear photonics, in particular in optical limiting.
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Affiliation(s)
- Petronela Gheorghe
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania;
| | - Adrian Petris
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania;
| | - Adina Mirela Anton
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania;
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology Politehnica Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
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Petris A, Gheorghe P, Rau I. Influence of continuous wave laser light at 532 nm on transmittance and on photoluminescence of DNA-CTMA-RhB solutions. Heliyon 2023; 9:e20410. [PMID: 37810853 PMCID: PMC10550718 DOI: 10.1016/j.heliyon.2023.e20410] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/10/2023] Open
Abstract
Recent results obtained in our experimental investigation on the influence of the illumination with continuous wave (c.w.) laser light at 532 nm on the transmittance at this wavelength and on the photoluminescence of the DNA-CTMA-RhB in butanol compound are reported. The temporal dependence of absorption changes induced by c. w. light at 532 nm in DNA-CTMA-RhB in butanol solution, and, for comparison, in RhB in butanol solution, is investigated experimentally and analyzed in order to assess the effect of DNA-CTMA on this light-induced process. The evolution in time of the peak's amplitude and wavelength of the photoluminescence spectra in solutions of DNA-CTMA-RhB in butanol, during their excitation with laser light at 532 nm wavelength has been also investigated and discussed.
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Affiliation(s)
- Adrian Petris
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125, Magurele, Romania
| | - Petronela Gheorghe
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125, Magurele, Romania
| | - Ileana Rau
- National University of Science and Technology Politehnica Bucharest, Faculty of Chemical Engineering and Biotechnologies, 1-7 Polizu Str, 011061, Bucharest, Romania
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Petris A, Gheorghe P, Rău I. DNA-CTMA Matrix Influence on Rhodamine 610 Light Emission in Thin Films. Polymers (Basel) 2023; 15:3105. [PMID: 37514494 PMCID: PMC10384363 DOI: 10.3390/polym15143105] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/13/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Due to the increased application of lasers in different fields (industry, medicine, etc.), there is a growing need for new laser sources with good beam quality and variable emission wavelength. At the same time, for environmental reasons, the obtaining of novel eco-friendly active optical materials, such as those based on the deoxyribonucleic acid (DNA) biopolymer, with optimal light emission properties, is of high interest. The results obtained in this study of the temporal dependence of the transmittance and of the light emission in thin films of DNA-CTMA-Rhodamine 610 (at different Rhodamine concentrations) (DNA-CTMA-Rh610), when they are illuminated with continuous wave laser light at 532 nm (frequently used in the optical pumping of dye lasers), are presented and discussed. The transmittance results obtained for thin film samples are compared to those obtained for the DNA-CTMA-Rh610 solutions in butanol, from which the films have been made, and also with those obtained for Rh610 solutions in butanol with the same concentrations. The investigation was performed in order to assess the influence of the DNA-CTMA and of the green laser light at 532 nm wavelength on relevant chromophore properties such as light transmission and fluorescence emission. The results obtained revealed that the DNA-CTMA matrix has an active influence on the Rhodamine 610 emission, in the whole range of concentrations of the investigated samples.
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Affiliation(s)
- Adrian Petris
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
| | - Petronela Gheorghe
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
| | - Ileana Rău
- Faculty of Chemical Engineering and Biotechnologies, University POLITEHNICA Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
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Petris A, Gheorghe P, Braniste T, Tiginyanu I. Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals. Materials (Basel) 2021; 14:ma14123194. [PMID: 34200536 PMCID: PMC8229523 DOI: 10.3390/ma14123194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 06/04/2021] [Accepted: 06/05/2021] [Indexed: 11/16/2022]
Abstract
The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.
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Affiliation(s)
- Adrian Petris
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
- Correspondence: (A.P.); (P.G.)
| | - Petronela Gheorghe
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
- Correspondence: (A.P.); (P.G.)
| | - Tudor Braniste
- National Center for Materials Study and Testing, Technical University of Moldova, Stefan cel Mare av. 168, 2004 Chisinau, Moldova; (T.B.); (I.T.)
| | - Ion Tiginyanu
- National Center for Materials Study and Testing, Technical University of Moldova, Stefan cel Mare av. 168, 2004 Chisinau, Moldova; (T.B.); (I.T.)
- Academy of Sciences of Moldova, Stefan cel Mare av. 1, 2001 Chisinau, Moldova
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Petris A, Vasiliu IC, Gheorghe P, Iordache AM, Ionel L, Rusen L, Iordache S, Elisa M, Trusca R, Ulieru D, Etemadi S, Wendelbo R, Yang J, Thorshaug K. Graphene Oxide-Based Silico-Phosphate Composite Films for Optical Limiting of Ultrashort Near-Infrared Laser Pulses. Nanomaterials (Basel) 2020; 10:E1638. [PMID: 32825360 PMCID: PMC7558703 DOI: 10.3390/nano10091638] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/14/2020] [Accepted: 08/18/2020] [Indexed: 12/16/2022]
Abstract
The development of graphene-based materials for optical limiting functionality is an active field of research. Optical limiting for femtosecond laser pulses in the infrared-B (IR-B) (1.4-3 μm) spectral domain has been investigated to a lesser extent than that for nanosecond, picosecond and femtosecond laser pulses at wavelengths up to 1.1 μm. Novel nonlinear optical materials, glassy graphene oxide (GO)-based silico-phosphate composites, were prepared, for the first time to our knowledge, by a convenient and low cost sol-gel method, as described in the paper, using tetraethyl orthosilicate (TEOS), H3PO4 and GO/reduced GO (rGO) as precursors. The characterisation of the GO/rGO silico-phosphate composite films was performed by spectroscopy (Fourier-transform infrared (FTIR), Ultraviolet-Visible-Near Infrared (UV-VIS-NIR) and Raman) and microscopy (atomic force microscopy (AFM) and scanning electron microscope (SEM)) techniques. H3PO4 was found to reduce the rGO dispersed in the precursor's solution with the formation of vertically agglomerated rGO sheets, uniformly distributed on the substrate surface. The capability of these novel graphene oxide-based materials for the optical limiting of femtosecond laser pulses at 1550 nm wavelength was demonstrated by intensity-scan experiments. The GO or rGO presence in the film, their concentrations, the composite films glassy matrix, and the film substrate influence the optical limiting performance of these novel materials and are discussed accordingly.
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Affiliation(s)
- Adrian Petris
- National Institute for Laser, Plasma and Radiation Physics, INFLPR, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania; (A.P.); (L.I.); (L.R.)
| | - Ileana Cristina Vasiliu
- National R&D Institute of Optoelectronics-INOE2000, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania; (A.M.I.); (S.I.); (M.E.)
| | - Petronela Gheorghe
- National Institute for Laser, Plasma and Radiation Physics, INFLPR, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania; (A.P.); (L.I.); (L.R.)
| | - Ana Maria Iordache
- National R&D Institute of Optoelectronics-INOE2000, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania; (A.M.I.); (S.I.); (M.E.)
| | - Laura Ionel
- National Institute for Laser, Plasma and Radiation Physics, INFLPR, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania; (A.P.); (L.I.); (L.R.)
| | - Laurentiu Rusen
- National Institute for Laser, Plasma and Radiation Physics, INFLPR, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania; (A.P.); (L.I.); (L.R.)
| | - Stefan Iordache
- National R&D Institute of Optoelectronics-INOE2000, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania; (A.M.I.); (S.I.); (M.E.)
| | - Mihai Elisa
- National R&D Institute of Optoelectronics-INOE2000, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania; (A.M.I.); (S.I.); (M.E.)
| | - Roxana Trusca
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University POLITEHNICA of Bucharest, 313 Independentei Street, 060042 Bucharest, Romania;
| | - Dumitru Ulieru
- Sitex 45 SRL, 126 A Erou Iancu Nicolae Street, 077190 Voluntari, Romania;
| | - Samaneh Etemadi
- Abalonyx AS, Forskningsveien 1, 0373 Oslo, Norway; (S.E.); (R.W.)
| | - Rune Wendelbo
- Abalonyx AS, Forskningsveien 1, 0373 Oslo, Norway; (S.E.); (R.W.)
| | - Juan Yang
- Department of Materials and Nanotechnology, SINTEF AS, Forskningsveien 1, 0343 Oslo, Norway; (J.Y.); (K.T.)
| | - Knut Thorshaug
- Department of Materials and Nanotechnology, SINTEF AS, Forskningsveien 1, 0343 Oslo, Norway; (J.Y.); (K.T.)
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Petris A, Gheorghe P, Rau I, Manea-Saghin AM, Kajzar F. All-optical spatial phase modulation in films of dye-doped DNA biopolymer. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Stan G, Orban H, Orban C, Petcu D, Gheorghe P. The influence of total knee arthroplasty on postural control. Chirurgia (Bucur) 2013; 108:874-878. [PMID: 24331329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/01/2013] [Indexed: 06/03/2023]
Abstract
INTRODUCTION The aim of this study is to assess the changes induced by the unilateral total knee arthroplasty procedure in human postural control. MATERIALS AND METHODS The measurements were performed using the "AMTI AccuGait" force plate. Subjects completed three consecutive double-limb standing balance trials. The mediolateral and anteroposterior displacements were derived from the force and moment profiles measured by the force platform. The path length per unit time (average velocity) and Elipse 95 (collect 95% of data) were also assessed. RESULTS Mediolateral displacement increase of 3.4% was observed postoperatively. Postoperative anterolateral displacement increase of 23.2% was recorded. The average velocity also rose by 16.8% postoperatively. The Elipse 95 grew by 33.7%postoperatively. DISCUSSION Excepting mediolateral displacement, all the other studied parameters showed significantly (p 0.05) higher values in the postoperative period compared with the preoperative one, in both open and closed eye trials. CONCLUSIONS The study results demonstrate that balance control is weaker shortly after unilateral knee arthroplasty,than in the preoperative period. Although proprioception is altered in osteoarthritic knees, the TKA procedure may additionally affect proprioceptors. The TKA causes additional instability in the days after the procedure, therefore the risk of falling injuries is higher in this period.
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