Optical Materials Express
·
2018
·Vol. 8
·期 8
·2089-2102
·
IF 2.566
Jian Cui,Xusheng Xiao,Yantao Xu,Xiaoxia Cui,Meiling Chen,Junjiang Guo,Min Lu,Bo Peng,Haitao Guo
For developing an ideal efficient and low-threshold medium for fiber lasers operated at 4 μm wavebands, 0.05 wt.% to 0.5 wt.% Dy3+ ions doped Ga0.8As39.2S60 chalcogenide glasses were investigated and a 4.2 μm fiber laser was theoretically studied based on the rate and propagation equations. It was shown that the Ga0.8As39.2S60 glass shows a desirable large Dy3+ ion solubility, which has been increased by an order of magnitude compared to As2S3 glass. Dy-rich nanocrystallines were found when the Dy3+ ions’ concentration is more than 0.3wt.% (i.e. 3000 ppmw), and the concentration quenching was found based on spectral analysis; however, no rapid decreases in lifetimes were observed. 0.3wt.% Dy3+ doped Ga0.8As39.2S60 glass possesses relatively large laser quality factor σemi × τmea = 1.70 × 10−23 cm2·s and excellent thermal stability (ΔT = 182°C), which can be successfully drawn into fibers indicating good potential for mid-infrared fiber laser.
研究领域:
材料科学
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光学工程
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Linfang Ma,Yanan Li,Xiaoyi Liu,Shengda Liu,Guixia Liu,Dan Li,Jinxian Wang,Wensheng Yu,Xiangting Dong
The self-activated and rare earth Dy 3+ and Eu 3+ ions doped Na 2 YMg 2 V 3 O 12 phosphors with single garnet structure were obtained by using solid state reaction method. Self-activated Na 2 YMg 2 V 3 O 12 phosphors have a wide excitation band in near-ultraviolet range, Dy 3+ and Eu 3+ ions were co-doped in Na 2 YMg 2 V 3 O 12 host to broaden the excitation peak range of the phosphors. Using 365 nm near-ultraviolet light as the excitation wavelength, Na 2 YMg 2 V 3 O 12 :Dy 3+ ,Eu 3+ phosphors simultaneously emit sharp transition peaks of Dy 3+ ions at 487 nm and 576 nm, and red transition peaks of Eu 3+ at 595 nm, 611 nm and 635 nm. The energy transfer processes between VO 4 3− , Dy 3+ and Eu 3+ were discussed. The multicolor light emitting can be adjustable and white light can be realized due to the changing amount of the doped ions. Emission spectra dependent of temperature showed that Na 2 YMg 2 V 3 O 12 :Dy 3+ , Eu 3+ phosphors had good thermal quenching performance, indicating that the phosphors can be used in the field of near ultraviolet excited WLED.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Haitang Hu,Miaomiao Wang,Shoujun Ding,Chuancheng Zhang,Hao Ren,Yong Zou,Wenpeng Liu
Rare earth ion-doped luminescent materials exhibit significant potential for application in visible solid-state laser and anticounterfeiting applications. The Czochralski method was employed to successfully synthesize high-quality Dy3+, Eu3+ codoped Gd3Sc2Al3O12 (GSAG), and Gd2.79Y0.21Sc2Al3O12 (GYSAG) single crystals. Comprehensive studies were conducted on their structural and physicochemical properties, luminescence properties, and fluorescence lifetime. The Dy,Eu:GSAG and Dy,Eu:GYSAG crystals both display favorable thermal conductivity values of 5.56 and 5.43 W m–1 K–1, respectively, along with commendable hardness properties of 7.241 and 7.247 kg/mm2. The emission color of the Dy,Eu:G(Y)SAG crystals can be adjusted from white light under a 355 nm excitation to orange-red light under a 405 nm excitation and bright yellow light under a 450 nm excitation. Additionally, the maximum stimulated emission cross-section for both crystals was calculated under various wavelength laser excitations. The fluorescence lifetime of the crystals at the 4F9/2 level (Dy3+) and the 5D0 level (Eu3+) was also examined. Notably, the fluorescence quantum efficiencies at the 4F9/2 level in Dy,Eu:GSAG and Dy,Eu:GYSAG were measured to be impressive at 91.3 and 92.7%, respectively. The mechanism of resonance energy transfer between Dy3+ and Eu3+ was analyzed, indicating promising applications of Dy,Eu:G(Y)SAG in visible solid-state lasers and multimode anticounterfeiting.
研究领域:
材料科学
·
光学
·
物理化学
✓ 已验证
DOI
OPTICAL MATERIALS
·
2024
·
IF 3.8
Lina Wang,YuJia Gong,YuHao Xia,Xingyu Zhao,Hai Guo
Non-invasive optical thermometer based on fluorescence intensity ratio ( FIR ) technology has a good market prospect. Herein, we reported Dy 3+ doped boroaluminosilicate glass and established dual-mode temperature sensing models by FIR . The X-ray diffraction patterns, differential scanning calorimetry and fourier transform infrared spectra were used to investigate the structure of glass sample. Besides, the transmittance spectra reveal that all samples have good transparency, which implies good light output capacity. Excited by 349 nm, the intensities of emission peaks at 454, 482, and 575 nm show different trend with increasing temperature (303–573 K). The maximal relative sensitivity reaches 1.72 %K −1 (I 482 /I 575 ) and 1.62 %K −1 (I 454 /I 575 ) at 303 K, respectively. The results surpass that of FIR thermometry based on Er 3+ doped systems. The reason is that the efficient energy gap of 4 I 15/2 level and 4 F 9/2 level of Dy 3+ ions is higher than that of Er 3+ ions. These results suggest that Dy 3+ doped boroaluminosilicate glasses are expected to be applied in optical temperature sensing field.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mingge Zhu,Xiaopei Zhu,Mengdi Zhang,Hangjian Wang,Wenjing Qiao,Yangfei Gao,Ruirui Kang,Mei Bai,Junwen Mei,Na Tian,Caiyin You,Xiaojie Lou
Lead-free ferroelectric ceramics show promising applications in environmentally friendly optoelectronic devices, yet conventional Bi 0.5 Na 0.5 TiO 3 -based materials face challenges in achieving balanced enhancement of energy storage density and photoluminescence properties. In this study, the influence mechanism of the structural evolution of Bi 0.5 Na 0.5 TiO 3 -based ceramics on their energy storage and photoluminescence properties was systematically studied. It was found that the doping of BaTiO 3 and SrTiO 3 caused local structural distortion and oxygen octahedral tilt, and the introduction of larger radius ions in A-site significantly refined grain size and improved breakdown electric field, endowing 0.75Bi (703/1500) Dy (47/1500) Na 0.5 TiO 3 -0.25BaTiO 3 with a high recoverable energy density of 3.73 J/cm 3 and an outstanding efficiency of 85.62 % under 350 kV/cm, while 0.75Bi (703/1500) Dy (47/1500) Na 0.5 TiO 3 -0.25SrTiO 3 exhibited strong photoluminescence properties, suggesting its potential as a yellow-green phosphor for warm white LEDs. Besides, SrTiO 3 doping enhanced crystal field symmetry to suppress thermal quenching via reduced phonon coupling, simultaneously improving Dy 3+ 6 H 15/2 → 4 I 13/2 transitions through optimized parity-forbidden relaxation. These findings elucidate the pivotal role of structural engineering strategies in tailoring the energy storage and photoluminescence properties of Bi 0.5 Na 0.5 TiO 3 ceramics, thereby will be beneficial for advancing the development of high-performance multifunctional dielectric capacitors.
研究领域:
材料科学
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铁电性
·
光电子学
·
固体物理学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）