Synthesis and the luminescent properties of the Nd3+ ions doped three kinds of fluoride nanocrystals in organic solvents

Chen, Zhuo; Tian, Chuanmao; Bo, Shuhui; Liu, Xinhou; Zhen, Zhen

doi:10.1016/j.optmat.2015.07.025

Cited by 4 publications

(5 citation statements)

References 24 publications

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“…decreasing first and then increasing with the increase of doping concentration. This phenomenon is different from that seen in previous reports, [23,25,26] and can be explained as follows. Generally speaking, carrier recombination can be divided into radiation recombination and non-radiation recombination.…”

contrasting

confidence: 99%

“…Moreover, 𝜏 df , 𝜏 se and 𝜏 av are very close to each other. According to the reported works, when Nd 3+ is doped in fluoride, the fluorescence lifetime of the 4 𝐹 3/2 level will decrease with the increasing Nd 3+ concentration due to the energy transfer between Nd 3+ ions, [2,23,25,26] and the fluorescence lifetime of low-Nd 3+ -doped NaYF 4 may exceed 300 µs. [24] The good lifetime estimation for a doping concentration lower than 1 mol% implies that models 1, 2 and 4 are highly effective in reflecting the fluorescence decay process of glass ceramics.…”

mentioning

confidence: 98%

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Preparation and 1.06 μm Fluorescence Decay of Nd³⁺-Doped Glass Ceramics Containing NaYF₄ Nanocrystallites*

Huang¹,

Chen²,

Shen³

et al. 2019

Chinese Phys. Lett.

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Considered to be a candidate for large-size bulk materials used in lasers and other fields, Nd3+-doped glass ceramics containing NaYF4 nanocrystallites are prepared. Using x-ray diffraction and transmission electron microscopy, we show that pure cubic NaYF4 is well precipitated in the glass matrix. To obtain the optical property of this material at 1.06 μm, the fluorescence decay of 4 F 3/2 energy levels is measured and analyzed. It is found that the fluorescence lifetime decreases first and then increases with the increasing dopant concentration due to the existing but finally weakening energy dissipation. As a result, a long radiation lifetime of about 191–444 μs is obtained at 1.06 μm in the prepared material. It is thus revealed that Nd3+-doped glass ceramic containing NaYF4 nanocrystallites is a potential candidate as a near-infrared laser material.

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confidence: 99%

mentioning

confidence: 98%

Preparation and 1.06 μm Fluorescence Decay of Nd³⁺-Doped Glass Ceramics Containing NaYF₄ Nanocrystallites*

Huang¹,

Chen²,

Shen³

et al. 2019

Chinese Phys. Lett.

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“…[38] However, the poor solubility of rare-earth ions in polymer hosts is a bottleneck that restricts the development of polymer waveguide amplifiers. Although this problem can be solved by synthesizing new rareearth-doped complexes [39] and rare-earth-doped LaF 3 or NaYF 4 nanoparticles with modified organic ligands, [40,41] only few successful polymer waveguide amplifiers have been demonstrated. Compared with rare-earth ions, the high solubility of organic molecules in a polymer matrix exhibits intrinsic advantages.…”

Section: Waveguide Preparationmentioning

confidence: 99%

Optical Gain at 637 nm Wavelength in Polymer Waveguide Amplifier Under Commercial LED Pumping for Planar Photonic Integration

Liu

Zhang

Xie

et al. 2022

Advanced Optical Materials

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transmit data [1] and has attracted considerable interest in optical local area networks and photonic integrated circuits. Plastic optical fibers (POF) are typically employed to transmit optical signals in VLC systems. [2,3] Although POF have low absorption losses in the visible wavelength window, it is still necessary to use optical waveguide amplifiers to compensate for the propagation loss. Moreover, there is a growing demand for chip-level monolithic photonic systems that integrate optical devices with various functions, such as optical multiplexing, switching, modulation, and amplification. These systems should employ waveguide amplifiers operating across the visible and near-infrared spectral ranges to compensate for the optical losses.Owing to their low absorption loss, simple processing, and being low cost, optical waveguide amplifiers based on polymer materials exhibit great potential in the visible wavelength region in photonic integrated circuits. For optical amplification in the red region, ongoing research mainly focused on the organic dyedoped [4][5][6] and rare-earth Eu 3+ ions or Er 3+ ion-doped polymer waveguide amplifiers. [7][8][9][10] The organic dye-doped optical amplifier pumped with a 575 nm pulsed laser achieved a relative gain of 9.3 dB cm −1 at 650 nm in a waveguide with a cross-section of 7 µm × 100 µm. [11] The rare-earth Eu 3+ ions-doped waveguide amplifier pumped with a 351 nm laser showed a gain of 8.6 dB cm −1 at 612 nm with a cross-section of 2.7 µm × 100 µm. [7] For Er 3+ ion-doped polymer amplifiers, a relative optical gain of 2.0 dB cm −1 at 650 nm, based on the up-conversion of Er 3+ ions, was obtained upon the excitation of a 976 nm laser diode (LD). [9] In addition to the waveguide amplifiers mentioned above, almost all waveguide amplifiers, such as Er 3+ -doped inorganic materials, [12][13][14] Nd 3+ -doped polymer [15][16][17] frequently select LDs as pump sources. In the pumping mode, either light-beam spatial coupling [7,10,17] or a wavelength division multiplexer (WDM) [12,18,19] is generally used to combine the signal laser with a pump laser. The light beam spatial coupling possess the disadvantage of limiting the amplifier to a 1D axial space, as shown in Figure 1a, which is not conducive to the application of Optical gains at 637 nm wavelength using light-emitting diodes (LEDs) instead of traditional semiconductor lasers as pumping sources are demonstrated in the organic molecule 2,6-bis[4-(diphenylamino)phenyl]-9,10-anthracenedione (AQ(PhDPA) 2 )-doped polymethylmethacrylate (PMMA) and SU-8 polymer waveguides. Under excitation of four blue-violet LEDs with different central wavelengths, fluorescence in the red band is observed owing to the transition of AQ(PhDPA) 2 from the excited states to the ground state based on the thermally activated delayed fluorescence (TADF) mechanism. Channel waveguides with a cross-section of 6 µm × 5 µm are fabricated. The relative gains of 5.0 and 4.0 dB cm −1 are obtained in rectangular waveguides with active core layers as AQ(PhDPA) ...

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“…There is a wealth of literature data available on the absorption and emission spectra of rare earth ions doped in CaF 2. [ 1–56 ] Table 1 collects the principal emission bands observed for the various trivalent rare earth ions with representative references. For Ce 3+ , it was shown that if Ce 3+ is associated with oxygen, the two 5d(e g ) ➔ 4f ( 2 F 5/2 ) and 5d(e g ) ➔ 4f ( 2 F 7/2 ) emission bands are shifted to 350 and 380 nm, respectively.…”

Section: Background: Spectra Of Rare Earth Ions In Caf2mentioning

confidence: 99%

“…It is well‐known that natural fluorites contain rare earth ions, and many optical spectra of rare earth ions in CaF 2 have been reported, although somewhat scattered in the literature. [ 1–56 ] With the increasing availability of Raman microscopes for mineral characterizations, it appears that these instruments can equally be used to probe with high resolution the luminescence of the rare earth ions which can be excited with 532 nm and other laser excitation, not only for rare earth in fluorites but also in other rare earth containing minerals. Previously, laser excited luminescence of rare earth ions in fluorites has been demonstrated using the Ar ion laser lines ranging from 364 to 514.5 nm.…”

Section: Introductionmentioning

confidence: 99%

Probing luminescence of rare earth ions in natural pink fluorites using Raman microscopes

Hagemann

Ayoubipour

Delgado

et al. 2022

J Raman Spectroscopy

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It is well-known that many natural fluorite crystals contain rare earth ions. In this work, a series of pink fluorites is studied to demonstrate that the use of Raman microscopes allows to obtain high resolution emission spectra of trivalent rare earth ions. These emission spectra allow in principle to distinguish differences of the local environment related to the charge compensation necessary when the divalent Ca ion is replaced by a trivalent rare earth ion. The pink fluorites from the Alps have grown under hydrothermal conditions, which results in the incorporation of oxygen into the fluorite. In one sample from Juchlistock (Bern, Switzerland), a trigonal Eu 3+ -oxygen center is clearly identified. Interestingly, a pink fluorite from China (Huanggang Mine, Inner Mongolia, China) shows a quite different emission spectrum from those of the Alps. In this sample, the emission bands have much lower relative intensity compared with the intensity of the CaF 2 Raman peak, indicating a much lower content of Er 3+ and Ho 3+ which emit around 520-560 nm. Literature examples show that Raman measurements of differently colored fluorite crystals can also present sharp rare earth spectra. By extension, it is thus possible to observe and identify emission spectra of rare earth ions in other mineral crystals using Raman microspectroscopy and avoid misassignments of the corresponding observed Raman spectra.

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Synthesis and the luminescent properties of the Nd3+ ions doped three kinds of fluoride nanocrystals in organic solvents

Cited by 4 publications

References 24 publications

Preparation and 1.06 μm Fluorescence Decay of Nd³⁺-Doped Glass Ceramics Containing NaYF₄ Nanocrystallites*

Preparation and 1.06 μm Fluorescence Decay of Nd³⁺-Doped Glass Ceramics Containing NaYF₄ Nanocrystallites*

Optical Gain at 637 nm Wavelength in Polymer Waveguide Amplifier Under Commercial LED Pumping for Planar Photonic Integration

Probing luminescence of rare earth ions in natural pink fluorites using Raman microscopes

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Synthesis and the luminescent properties of the Nd3+ ions doped three kinds of fluoride nanocrystals in organic solvents

Cited by 4 publications

References 24 publications

Preparation and 1.06 μm Fluorescence Decay of Nd3+-Doped Glass Ceramics Containing NaYF4 Nanocrystallites*

Preparation and 1.06 μm Fluorescence Decay of Nd3+-Doped Glass Ceramics Containing NaYF4 Nanocrystallites*

Optical Gain at 637 nm Wavelength in Polymer Waveguide Amplifier Under Commercial LED Pumping for Planar Photonic Integration

Probing luminescence of rare earth ions in natural pink fluorites using Raman microscopes

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Product

Resources

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Preparation and 1.06 μm Fluorescence Decay of Nd³⁺-Doped Glass Ceramics Containing NaYF₄ Nanocrystallites*

Preparation and 1.06 μm Fluorescence Decay of Nd³⁺-Doped Glass Ceramics Containing NaYF₄ Nanocrystallites*