Preparation and Fluorescence Spectroscopy of Bulk Monoclinic Eu3+:Y2O3 and Comparison to Eu3+:Y2O3 Nanocrystals

Williams, Diane K.; Bihari, Bipin; Tissue, Brian M.; McHale, J. M.

doi:10.1021/jp972996e

Cited by 243 publications

(149 citation statements)

References 22 publications

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“…Therefore the decreasing Eu 3+ luminescence with more CTAB concentration than 0.006 mol/L can definitively be understood by the fact that the size of LaF 3 :Eu 3+ nanocrystals was decreased (See Fig.2 and 8). The similar tendency for nanomaterials was reported previously for nanophosphors with lower density of defects [17,18]. …”

Section: Resultssupporting

confidence: 88%

Size-dependence of LaF₃:Eu³⁺nanocrystals on Eu³⁺photo-luminescence intensity

Zhang

Hayakawa

Nogami

2009

IOP Conf. Ser.: Mater. Sci. Eng.

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Section: Resultssupporting

confidence: 88%

Size-dependence of LaF₃:Eu³⁺nanocrystals on Eu³⁺photo-luminescence intensity

Zhang

Hayakawa

Nogami

2009

IOP Conf. Ser.: Mater. Sci. Eng.

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] These phosphors are characterized by their high energyconversion efficiency, purity in spectral colors, and high thermal stability. They have the advantage over the currently used sulfide phosphors in stability in vacuum and absence of corrosive gas emission under electron bombardment.…”

Section: Introductionmentioning

confidence: 99%

LaPO4:Ce,Tb and YVO4:Eu nanophosphors: Luminescence studies in the vacuum ultraviolet spectral range

Pankratov

Попов

Shirmane

et al. 2011

Journal of Applied Physics

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Comparative analysis of the luminescent properties of nanocrystalline LaPO 4 :Ce,Tb and YVO 4 :Eu luminescent materials with macrocrystalline analogues, commercially produced by Philips, has been performed under excitation by pulsed vacuum ultraviolet (VUV) synchrotron radiation, ranging from 3.7-40 eV. Special attention was paid to VUV spectral range, which is not reachable with commonly used lamp and laser sources. Our results clearly show distinct difference in the excitation spectra for nano-and macrocrystalline samples, especially at energies, when the spatial separation of electron-hole pairs is comparable with sizes of nanoparticles. Differences in the region of multiplication of the electronic excitations are also demonstrated and discussed.

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“…Lifetimes and oscillator strengths have been studied as a function of local environment [11][12][13][14], ion concentration [15][16][17], and particle size [18][19][20][21][22][23]. But so far, research has focused solely on detecting and enhancing spontaneous MD emission, with no work done on selective excitation through magnetic fields.…”

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confidence: 99%

Excitation of Magnetic Dipole Transitions at Optical Frequencies

et al. 2015

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We use the magnetic field distribution of an azimuthally polarized focused laser beam to excite a magnetic dipole transition in Eu 3þ ions embedded in a Y 2 O 3 nanoparticle. The absence of the electric field at the focus of an azimuthally polarized beam allows us to unambiguously demonstrate that the nanoparticle is excited by the magnetic dipole transition near 527.5 nm. When the laser wavelength is resonant with the magnetic dipole transition, the nanoparticle maps the local magnetic field distribution, whereas when the laser wavelength is resonant with an electric dipole transition, the nanoparticle is sensitive to the local electric field. Hence, by tuning the excitation wavelength, we can selectively excite magnetic or electric dipole transitions through optical fields. DOI: 10.1103/PhysRevLett.114.163903 PACS numbers: 42.60. v, 42.25.Ja, 71.20.Eh, 78.67.Bf In the optical frequency regime, magnetic dipole transitions are orders of magnitude weaker than their electric dipole counterparts [1][2][3]. Because of this, magnetic dipole (MD) transitions are often neglected in optics, and the study of light-matter interactions becomes instead the study of interactions between electric fields and electric dipoles (ED). Perhaps the most well-known exceptions occur in the fields of metamaterials [4] and photonic crystal cavities [5,6], in which specially engineered structures can be produced to enhance interactions with the magnetic field. Nature, however, also provides materials with strong MD transitions, namely, rare earth ions. Many of their MD transitions are found within the visible spectrum, making them promising candidates for the optical excitation of MD transitions.Much theoretical and experimental work has been done exploring the MD and ED contributions to spontaneous emission from Eu 3þ and other trivalent rare earth ions [1,[7][8][9][10]. Lifetimes and oscillator strengths have been studied as a function of local environment [11][12][13][14], ion concentration [15][16][17], and particle size [18][19][20][21][22][23]. But so far, research has focused solely on detecting and enhancing spontaneous MD emission, with no work done on selective excitation through magnetic fields. In 1939, Deutschbein first identified the MD character of the 7 F 0 → 5 D 1 transition in Eu 3þ (c.f. Fig. 1(a)) by exploiting the birefringence of EuðBrO 3 Þ 3 · 9H 2 O and EuðC 2 H 5 SO 4 Þ 3 · 9H 2 O crystals [24]. He could deduce the MD or ED character of a transition by recording absorption or emission spectra for ordinary and extraordinary polarizations and comparing them to a spectrum taken along the c axis of the crystal. However, he could not selectively address individual transitions. Here, we report the direct and selective optical excitation of a MD transition in the rare earth ion Eu 3þ .The light-matter interaction between a charge-neutral quantum system and an electromagnetic field can be represented by a multipole expansion of the interaction Hamiltonianwith p being the electric dipole moment, m the magnetic dipole ...

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Preparation and Fluorescence Spectroscopy of Bulk Monoclinic Eu³⁺:Y₂O₃ and Comparison to Eu³⁺:Y₂O₃ Nanocrystals

Cited by 243 publications

References 22 publications

Size-dependence of LaF₃:Eu³⁺nanocrystals on Eu³⁺photo-luminescence intensity

Size-dependence of LaF₃:Eu³⁺nanocrystals on Eu³⁺photo-luminescence intensity

LaPO4:Ce,Tb and YVO4:Eu nanophosphors: Luminescence studies in the vacuum ultraviolet spectral range

Excitation of Magnetic Dipole Transitions at Optical Frequencies

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Preparation and Fluorescence Spectroscopy of Bulk Monoclinic Eu3+:Y2O3 and Comparison to Eu3+:Y2O3 Nanocrystals

Cited by 243 publications

References 22 publications

Size-dependence of LaF3:Eu3+nanocrystals on Eu3+photo-luminescence intensity

Size-dependence of LaF3:Eu3+nanocrystals on Eu3+photo-luminescence intensity

LaPO4:Ce,Tb and YVO4:Eu nanophosphors: Luminescence studies in the vacuum ultraviolet spectral range

Excitation of Magnetic Dipole Transitions at Optical Frequencies

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Preparation and Fluorescence Spectroscopy of Bulk Monoclinic Eu³⁺:Y₂O₃ and Comparison to Eu³⁺:Y₂O₃ Nanocrystals

Size-dependence of LaF₃:Eu³⁺nanocrystals on Eu³⁺photo-luminescence intensity

Size-dependence of LaF₃:Eu³⁺nanocrystals on Eu³⁺photo-luminescence intensity