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Boubekri H, Fartas R, Diaf M, Cittadino G, Tonelli M, Bitam A, Toma O. Luminescence properties of CdF 2 single crystals co-doped with Er 3+ and Y 3+ ions. LUMINESCENCE 2024; 39:e4719. [PMID: 38637113 DOI: 10.1002/bio.4719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/04/2024] [Accepted: 02/20/2024] [Indexed: 04/20/2024]
Abstract
The luminescence properties of erbium and yttrium co-doped cadmium difluoride with three different concentrations of yttrium were investigated. First, we synthesized single crystal samples with good optical quality using the Bridgman technique. From the optical absorption spectra, recorded at room temperature, both in the ultraviolet-visible and infrared spectral ranges, Judd-Ofelt analysis was performed based on yttrium concentrations to predict the radiative properties of Er3+ luminescent ions. For the 10% optimum concentration of yttrium, a detailed photoluminescence investigation was carried out. We mainly explored green, red, and near-infrared fluorescence under different excitation wavelengths and presented their highlight spectroscopic characteristics. The desired transitions had relatively high emission cross-sections both under visible and near-infrared excitation. Optical gain followed a similar trend. Furthermore, the dynamic fluorescence study showed a significant increase in the measured lifetime under an 800 nm infrared excitation. The upconversion process under an 800 nm excitation produced quantum efficiency greater than 100% due to the contribution of more than one energy transfer mechanism.
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Affiliation(s)
- Hani Boubekri
- Ecole Normale Supérieure d'Enseignement Technologique (ENSET), Cité des frères Bousseta, Skikda, Azzaba, Algeria
- Laser Physics, Optical Spectroscopy and Optoelectronics Laboratory, Badji Mokhtar Annaba University, POB 12, Annaba, Algeria
| | - Reda Fartas
- Laser Physics, Optical Spectroscopy and Optoelectronics Laboratory, Badji Mokhtar Annaba University, POB 12, Annaba, Algeria
- 08 May 1945 University, Guelma, Algeria
| | - Madjid Diaf
- Laser Physics, Optical Spectroscopy and Optoelectronics Laboratory, Badji Mokhtar Annaba University, POB 12, Annaba, Algeria
| | - Giovanni Cittadino
- Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, Pisa, Italy
| | - Mauro Tonelli
- Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, Pisa, Italy
| | - Adel Bitam
- Laser Physics, Optical Spectroscopy and Optoelectronics Laboratory, Badji Mokhtar Annaba University, POB 12, Annaba, Algeria
- University of Tamanghasset, Tamanghasset, Algeria
| | - Octavian Toma
- Solid-State Quantum Electronics Laboratory, National Institute for Laser, Plasma and Radiation Physics, Atomistilor Street 409, Magurele, Ilfov, Romania
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V S Bhagavan N, Ravanamma R, Krishnaiah KV, Ravi N, Kagola UK, Kesavulu CR, Saranya PL, Venkatramu V. Orange-red luminescence of samarium-doped bismuth-germanium-borate glass for light-emitting devices. LUMINESCENCE 2023; 38:1750-1757. [PMID: 37464921 DOI: 10.1002/bio.4560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 07/14/2023] [Indexed: 07/20/2023]
Abstract
Samarium (Sm3+ )-doped glass has sparked a rising interest in demonstrating a noticeable emission in the range of 400-700, which is advantageous in solid-state lasers in the visible region, colour displays, undersea communication, and optical memory devices. This study reports the fabrication of Sm3+ -doped bismuth-germanium-borate glasses were established using a standard melt-quenching technique and inspection by absorption, steady-state luminescence, and transient studies. The typical peaks of Sm3+ ions were detected in the visible range under 403 nm excitation. A strong emission band was detected at 599 nm that resembles the 4 G5/2 →6 H7/2 transition of Sm3+ ions for BGBiNYSm0.5 glass. Furthermore, a reddish-orange (coral) luminescence at 646 nm that resembles the 4 G5/2 →6 H9/2 transition was also perceived. The stimulated emission cross-section of 4 G5/2 level for BGBiNYSm0.5 glass was 0.39 × 10-22 cm2 . Lifetime of the 4 G5/2 level was enhanced for the BGBiNYSm0.5 glass and decreased with an increase in active ion concentrations. The lifetime quenching of ions at the metastable state was because of energy transfer among Sm3+ ions by cross-relaxation channels. Commission Internationale de l'Éclairage (CIE) coordinates were evaluated from the emission spectra. Moreover, all the findings recommend these glass as light-emitting materials in the coral region at 599 nm for solid-state lighting applications.
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Affiliation(s)
- Netheti V S Bhagavan
- Department of Physics, Dr. V.S. Krishna Govt. Degree College (A), Vishakapatnam, Andhra Pradesh, India
| | - R Ravanamma
- Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal, Andhra Pradesh, India
| | - Kummara Venkata Krishnaiah
- Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal, Andhra Pradesh, India
| | - N Ravi
- Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal, Andhra Pradesh, India
| | - Upendra Kumar Kagola
- Department of Physics, School of Applied Sciences, REVA University, Bengaluru, Karnataka, India
| | - C R Kesavulu
- Department of Physics, Institute of Aeronautical Engineering, Hyderabad, Telangana, India
| | - P L Saranya
- Department of Physics, Govt. Degree College for Women, Vishakapatnam, Andhra Pradesh, India
| | - V Venkatramu
- Department of Physics, Krishna University Dr M.R. Appa Row College of PG Studies, Nuzvid, Andhra Pradesh, India
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Nallamala K, Shaik NR, Baddela M, Shaik S, Midde RB. Investigation of the spectral characteristics of Sm 3+ ions in lead borosilicate glass for photonic applications. LUMINESCENCE 2023; 38:1768-1779. [PMID: 37488972 DOI: 10.1002/bio.4563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 07/08/2023] [Accepted: 07/21/2023] [Indexed: 07/26/2023]
Abstract
Different concentrations of Sm2 O3 -doped lead borosilicate glass were synthesized using a melt-quenching method and their characteristics were analyzed using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy absorption, emission, and decay curves. From the XRD patterns, the noncrystalline nature of titled glass was confirmed. The structural groups that existed in the host glass were observed from FTIR spectra. The Judd-Ofelt (JO) intensity parameters and oscillator strengths were derived from the absorption spectra and compared with various reported systems. The excitation luminescence levels of the Sm3+ ion radiative properties were further computed using the JO intensity parameters. Effective bandwidth, emission cross-sections (σe ), and several lasing properties were assessed from emission spectra and compared with other reported glass systems. The decay curves of the 4 G5/2 level of Sm3+ ion were also been measured and examined. Additionally, the colour coordinates of the Commission International de I'Éclairage chromaticity were assessed. The titled glass were suitable for visible reddish orange luminescence devices based on all obtained parameters.
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Affiliation(s)
- Kiran Nallamala
- Department of Physics, Rajeev Gandhi Memorial College of Engineering & Technology, Nandyal, India
| | - Nayab Rasool Shaik
- Department of Physics, Rajeev Gandhi Memorial College of Engineering & Technology, Nandyal, India
| | - Munisudhakar Baddela
- Department of Physics, SV College of Engineering, Karakambadi Road, Tirupati, India
| | - Shabeena Shaik
- Department of EEE, Rajeev Gandhi Memorial College of Engineering & Technology, Nandyal, India
| | - Reddi Babu Midde
- Department of Basic Science and Humanities, Sree Rama Engineering College, Karakambadi Road, Tirupati, India
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Meng F, Yang X, Gao J. Phonon-assisted upconversion photoluminescence of monolayer MoS 2 at elevated temperatures. OPTICS EXPRESS 2023; 31:28437-28443. [PMID: 37710897 DOI: 10.1364/oe.495824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 08/03/2023] [Indexed: 09/16/2023]
Abstract
Upconversion photoluminescence (UPL) lies at the heart of optical refrigeration and energy harvesting. Monolayer transition metal dichalcogenides (TMDCs) have been identified as an excellent platform with robust phonon-exciton coupling for studying the phonon-assisted UPL process. Herein, we investigate the multiphonon-assisted UPL emission in monolayer MoS2 at elevated temperatures and the temperature-dependent phonon contributions in the UPL process. When temperature goes up from 295 K to 460 K, the enhancement of the integrated UPL intensity is demonstrated due to the increased phonon population and the reduced phonon numbers involved in the UPL process. Our findings reveal the underlying mechanism of phonon-assisted UPL at high temperatures, and pave the way for the applications of photon upconversion in display, nanoscale thermometry, anti-Stokes energy harvesting, and optical refrigeration.
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Thomas J, Meyneng T, Tehranchi A, Gregoire N, Monet F, Seletskiy D, Messaddeq Y, Kashyap R. Demonstration of laser cooling in a novel all oxide GAYY silica glass. Sci Rep 2023; 13:5436. [PMID: 37012273 PMCID: PMC10070423 DOI: 10.1038/s41598-023-31912-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/17/2023] [Indexed: 04/05/2023] Open
Abstract
We demonstrate laser induced cooling in ytterbium doped silica (SiO2) glass with alumina, yttria co-doping (GAYY-Aluminum: Yttrium: Ytterbium Glass) fabricated using the modified chemical vapour deposition (MCVD) technique. A maximum temperature reduction by - 0.9 K from room temperature (296 K) at atmospheric pressure was achieved using only 6.5 W of 1029 nm laser radiation. The developed fabrication process allows us to incorporate ytterbium at concentration of 4 × 1026 ions/m3 which is the highest value reported for laser cooling without clustering or lifetime shortening, as well as to reach a very low background absorptive loss of 10 dB/km. The numerical simulation of temperature change versus pump power well agrees with the observation and predicts, for the same conditions, a temperature reduction of 4 K from room temperature in a vacuum. This novel silica glass has a high potential for a vast number of applications in laser cooling such as radiation-balanced amplifiers and high-power lasers including fiber lasers.
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Affiliation(s)
- Jyothis Thomas
- Fabulas Laboratory, Department of Engineering Physics, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada.
| | - Thomas Meyneng
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Québec, QC, G1V 0A6, Canada
| | - Amirhossein Tehranchi
- Fabulas Laboratory, Department of Electrical Engineering, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada
| | - Nicolas Gregoire
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Québec, QC, G1V 0A6, Canada
| | - Frederic Monet
- Fabulas Laboratory, Department of Engineering Physics, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada
| | - Denis Seletskiy
- femtoQ Laboratory, Department of Engineering Physics, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada
| | - Younès Messaddeq
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Québec, QC, G1V 0A6, Canada
| | - Raman Kashyap
- Fabulas Laboratory, Department of Engineering Physics, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada
- Fabulas Laboratory, Department of Electrical Engineering, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada
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Du J, Wang X, Bu Y, Yan X. Monte Carlo simulation and experimental evaluation of the quantum efficiency of Eu 3+-doped glass at different temperatures. Phys Chem Chem Phys 2020; 22:26015-26024. [DOI: 10.1039/d0cp03159c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The quantum efficiency (QE) is a key parameter to evaluate the optical properties of fluorescent glass.
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Affiliation(s)
- Jiaxuan Du
- College of Electronic and Optical Engineering & College of Microelectronics
- Nanjing University of Posts and Telecommunications
- Nanjing
- China
| | - Xiangfu Wang
- College of Electronic and Optical Engineering & College of Microelectronics
- Nanjing University of Posts and Telecommunications
- Nanjing
- China
- Key Laboratory of Radio Frequency and Micro–Nano Electronics of Jiangsu Province
| | - Yanyan Bu
- College of Electronic and Optical Engineering & College of Microelectronics
- Nanjing University of Posts and Telecommunications
- Nanjing
- China
- College of Science
| | - Xiaohong Yan
- College of Electronic and Optical Engineering & College of Microelectronics
- Nanjing University of Posts and Telecommunications
- Nanjing
- China
- Key Laboratory of Radio Frequency and Micro–Nano Electronics of Jiangsu Province
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Development of ytterbium-doped oxyfluoride glasses for laser cooling applications. Sci Rep 2016; 6:21905. [PMID: 26915817 PMCID: PMC4768141 DOI: 10.1038/srep21905] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Accepted: 01/29/2016] [Indexed: 11/24/2022] Open
Abstract
Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb3+) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb3+ concentration, suggesting a decrease in the photoluminescence quantum yield (PLQY). The PLQY of the samples was measured with an integrating sphere using an absolute method. The highest PLQY was found to be 0.99(11) for the 2 mol% Yb3+: glass and decreases with increasing Yb3+ concentration. The mean fluorescence wavelength and background absorption of the samples were also evaluated. Upconversion luminescence under 975 nm laser excitation was observed and attributed to the presence of Tm3+ and Er3+ ions which exist as impurity traces with YbF3 starting powder. Decay curves for the Yb3+: 2F5/2 → 2F7/2 transition exhibit single exponential behavior for all the samples, although lifetime decrease was observed for the excited level of Yb3+ with increasing Yb3+ concentration. Also observed are an increase in the PLQY and a slight decrease in lifetime with increasing the pump power. Finally, the potential of these oxyfluoride glasses with high PLQY and low background absorption for laser cooling applications is discussed.
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Neves AAR, Jones PH, Luo L, Maragò OM. Focus issue introduction: optical cooling and trapping. OPTICS EXPRESS 2015; 23:9917-9923. [PMID: 25969033 DOI: 10.1364/oe.23.009917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The year 2015 is an auspicious year for optical science, as it is being celebrated as the International Year of Light and Light-Based Technologies. This Focus Issue of the journals Optics Express and Journal of the Optical Society of America B has been organized by the OSA Technical Group on Optical Cooling and Trapping to mark this occasion, and to highlight the most recent and exciting developments in the topics covered by the group. Together this joint Focus Issue features 32 papers, including both experimental and theoretical works, which span this wide range of activities.
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