Selective self-redox and crystal field modulation for enhanced and tuned broadband emission in chromium-doped aluminate glasses

2019 ◽  
Vol 7 (18) ◽  
pp. 5401-5409
Author(s):  
Xingyu Li ◽  
Haoyang Luo ◽  
Yafei Wang ◽  
Xiu Wang ◽  
Jiangkun Cao ◽  
...  
Keyword(s):  
Crystal Field ◽  
Emission Intensity ◽  
Emission Region ◽  
Broadband Emission ◽  
Field Modulation

Selective self-redox and crystal field modulation have been demonstrated for enhanced and tuned broadband emission in chromium-doped versatile glass. The emission intensity was enhanced by more than one order, and a new band at ∼708 nm was generated to enrich emission region.

E.P.R. investigation of the quadrupolar crystal field modulation in the incommensurate phase of Rb2ZnCl4: Mn2+

1984 ◽  
Vol 53 (1) ◽  
pp. 261-264 ◽  
Author(s):  
A. H. Kaziba ◽  
M. Pezeril ◽  
J. Emery ◽  
J. C. Fayet
Keyword(s):  
Crystal Field ◽  
Incommensurate Phase ◽  
Field Modulation

Color tuning of (K1−x,Nax)SrPO4:0.005Eu2+, yTb3+ blue-emitting phosphors via crystal field modulation and energy transfer

2013 ◽  
Vol 1 (30) ◽  
pp. 4570 ◽  
Author(s):  
Pengpeng Dai ◽  
Xintong Zhang ◽  
Lulu Bian ◽  
Shan Lu ◽  
Yichun Liu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Crystal Field ◽  
Color Tuning ◽  
Field Modulation

scholarly journals Calculation Of The Crystal Field Parameters For Eu3+ Doped In SrAl2O4 And SrIn2O4 Spinels

2012 ◽  
Vol 56 (1) ◽  
pp. 132-138
Author(s):  
M. L. Stanciu
Keyword(s):  
Experimental Data ◽  
Rare Earth ◽  
Crystal Field ◽  
Energy Levels ◽  
Superposition Model ◽  
Strontium Aluminate ◽  
Intrinsic Parameters ◽  
Broadband Emission ◽  
Host Materials ◽  
Crystal Field Parameters

AbstractStrontium aluminate (SrAl2O4) and the indium aluminate (SrIn2O4) spinels have been proven to be efficient host materials, which offer the possibility of generating broadband emission after doping with rare earth trivalent ions. The present work is devoted to the calculation of the crystal field parameters and the energy levels of the trivalent europium doped in SrAl2O4 and SrIn2O4 spinels, using the superposition model of the crystal field. Using the intrinsic parameters for Eu3+-O2− bonds, and the geometry structure of the each crystal, we modeled the CFPs and simulated the low-lying energy levels schemes. The obtained results are compared with the experimental data and discussed.

Crystal field modulation-control, bandgap engineering and shallow/deep traps tailoring-guided design of a color-tunable long-persistent phosphor (Ca, Sr)Ga4O7:Mn2+,Bi3+

2019 ◽  
Vol 48 (1) ◽  
pp. 253-265 ◽  
Author(s):  
Weixin Zheng ◽  
Haoyi Wu ◽  
Guifang Ju ◽  
Zhong Mo ◽  
Huafeng Dong ◽  
...  
Keyword(s):  
Crystal Field ◽  
Bandgap Engineering ◽  
Deep Traps ◽  
Color Tunable ◽  
Modulation Control ◽  
Field Modulation

A color-tunable long-persistent phosphor (Ca,Sr)Ga4O7:Mn2+, Bi3+ based on crystal field modulation, bandgap engineering and traps tailoring.

scholarly journals Detection of persistent VHE gamma-ray emission from PKS 1510–089 by the MAGIC telescopes during low states between 2012 and 2017

2018 ◽  
Vol 619 ◽  
pp. A159 ◽  
Author(s):  
◽  
V. A. Acciari ◽  
S. Ansoldi ◽  
L. A. Antonelli ◽  
A. Arbet Engels ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Spectral Energy Distribution ◽  
High Energy ◽  
Outer Radius ◽  
Spectral Energy ◽  
Emission Region ◽  
Emission Model ◽  
Broadband Emission ◽  
Very High Energy ◽  
Gamma Ray Emission

Context. PKS 1510–089 is a flat spectrum radio quasar strongly variable in the optical and GeV range. To date, very high-energy (VHE, > 100 GeV) emission has been observed from this source either during long high states of optical and GeV activity or during short flares. Aims. We search for low-state VHE gamma-ray emission from PKS 1510–089. We characterize and model the source in a broadband context, which would provide a baseline over which high states and flares could be better understood. Methods. PKS 1510–089 has been monitored by the MAGIC telescopes since 2012. We use daily binned Fermi-LAT flux measurements of PKS 1510–089 to characterize the GeV emission and select the observation periods of MAGIC during low state of activity. For the selected times we compute the average radio, IR, optical, UV, X-ray, and gamma-ray emission to construct a low-state spectral energy distribution of the source. The broadband emission is modeled within an external Compton scenario with a stationary emission region through which plasma and magnetic fields are flowing. We also perform the emission-model-independent calculations of the maximum absorption in the broad line region (BLR) using two different models. Results. The MAGIC telescopes collected 75 hr of data during times when the Fermi-LAT flux measured above 1 GeV was below 3  ×  10−8 cm−2 s−1, which is the threshold adopted for the definition of a low gamma-ray activity state. The data show a strongly significant (9.5σ) VHE gamma-ray emission at the level of (4.27 ± 0.61stat)  ×  10−12 cm−2 s−1 above 150 GeV, a factor of 80 lower than the highest flare observed so far from this object. Despite the lower flux, the spectral shape is consistent with earlier detections in the VHE band. The broadband emission is compatible with the external Compton scenario assuming a large emission region located beyond the BLR. For the first time the gamma-ray data allow us to place a limit on the location of the emission region during a low gamma-ray state of a FSRQ. For the used model of the BLR, the 95% confidence level on the location of the emission region allows us to place it at a distance > 74% of the outer radius of the BLR.

scholarly journals Effect of Yb^3+ concentration on the broadband emission intensity and peak wavelength shift in Yb/Bi ions co-doped silica-based glasses

2010 ◽  
Vol 18 (18) ◽  
pp. 18642 ◽  
Author(s):  
Nengli Dai ◽  
Bing Xu ◽  
Zuowen Jiang ◽  
Jingang Peng ◽  
Haiqing Li ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Wavelength Shift ◽  
Peak Wavelength ◽  
Broadband Emission ◽  
Co Doped

Full-color tuning in europium doped phosphosilicate phosphors via adjusting crystal field modulation or excitation wavelength

2019 ◽  
Vol 770 ◽  
pp. 411-418 ◽  
Author(s):  
Dorim Kim ◽  
Byung Kee Moon ◽  
Sung Heum Park ◽  
Jung Hwan Kim ◽  
Jung Hyun Jeong
Keyword(s):  
Crystal Field ◽  
Excitation Wavelength ◽  
Color Tuning ◽  
Full Color ◽  
Field Modulation

scholarly journals Color tuning of Bi3+-doped double-perovskite Ba2(Gd1−x,Lux)NbO6 (0 ≤ x ≤ 0.6) solid solution compounds via crystal field modulation for white LEDs

RSC Advances ◽  
2020 ◽  
Vol 10 (43) ◽  
pp. 25500-25508
Author(s):  
Xufang Tang ◽  
Dingfeng Jin ◽  
Jun Zhao ◽  
Min Jin
Keyword(s):  
Solid Solution ◽  
Rare Earth ◽  
Crystal Field ◽  
Solid Solutions ◽  
Double Perovskite ◽  
Color Tuning ◽  
White Leds ◽  
Color Tunable ◽  
Field Modulation

Nowadays, rare-earth-free color-tunable solid solutions are receiving great attention.

Broadly tunable emission from Ca2Al2SiO7:Bi phosphors based on crystal field modulation around Bi ions

2016 ◽  
Vol 40 (11) ◽  
pp. 9579-9585 ◽  
Author(s):  
Minhong Li ◽  
Lili Wang ◽  
Weiguang Ran ◽  
Qingzhi Liu ◽  
Chunyan Ren ◽  
...  
Keyword(s):  
Crystal Field ◽  
Field Environment ◽  
Field Modulation ◽  
Tunable Emission

Realization of the tuning emission of Bi3+ by micro-modulation of the crystal field environment of the activator.

Cr^3+-doped Bi_2Ga_4O_9-Bi_2Al_4O_9 solid-solution phosphors: crystal-field modulation and lifetime-based temperature sensing

2017 ◽  
Vol 42 (23) ◽  
pp. 4950 ◽  
Author(s):  
Daqin Chen ◽  
Xiao Chen ◽  
Xiaoyue Li ◽  
Hai Guo ◽  
Shen Liu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Crystal Field ◽  
Temperature Sensing ◽  
Field Modulation
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