Excited-state absorption and up-conversion in Er3+single sites of CdF2:Er3+,Na+

Jouart, J.P.; Bissieux, C.; Mary, G.

doi:10.1088/0022-3719/20/13/017

Cited by 17 publications

(14 citation statements)

References 19 publications

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“…The dependence of anti-Stokes emission intensity on the laser power becomes linear at high power. This phenomenon has been also observed with Er3i [20] and interpreted as a 'saturation effect when the excited state absorption exceeds the spontaneous decay of the intermediate level. This is proved by the decrease of the rise time of the anti-Stokes luminescence when the laser power exceeds a threshold of about 60 mW (when the power is lower than this value, the rise time is basically constant).…”

Section: Upconversion Processesmentioning

confidence: 53%

Site‐Selective Upconversion Luminescence of Ho³⁺ ‐Doped CaF₂ Crystals

Zhang¹,

Jouart²,

Bouffard³

et al. 1994

Physica Status Solidi (b)

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With red dye laser excitation, site-selective upconversion properties of three Ho3+ centres (C,,, C,,, and dimer) in CaF, : 0.1 at% Ho3+ crystals are studied. The energy level diagrams for the three centres are deduced from the spectral data. The excited state absorption from the 51, level plays a very important role in the upconversion coming from C,, and C3" centres, whereas the ground state absorption of 'I, dominates for that from the dimer centre. The upconversion of C,, and C,, centres is explained by a sequential two-photon excitation mechanism. For the dimer centre, the predominant upconversion mechanism is energy transfer.

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Section: Upconversion Processesmentioning

confidence: 53%

Site‐Selective Upconversion Luminescence of Ho³⁺ ‐Doped CaF₂ Crystals

Zhang¹,

Jouart²,

Bouffard³

et al. 1994

Physica Status Solidi (b)

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“…They are caused by radiative transitions from, respectively, 4 S 3/2 and 4 F 9/2 excited Er 3+ ion states to the 4 I 15/2 ground state. The fluorescence spectra corresponding to 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions consist of 14 and 21 lines, respectively . Multiple structure of these two transitions makes Raman peaks centered at 556 cm −1 and 3750 cm −1 very broad.…”

Section: Resultsmentioning

confidence: 99%

“…4 I 15/2 transitions consist of 14 and 21 lines, respectively. 22 Multiple structure of these two transitions makes Raman peaks centered at 556 cm À1 and 3750 cm À1 very broad. Raman-active internal vibrations of NbO 6 octahedra, distinctly exhibited in NKN ceramics 23 and expressively enhanced in NKN nanofibers, 18 become almost indiscernible in Er:NKN.…”

Section: Resultsmentioning

confidence: 99%

Broadband luminescent ferroelectric biocompatible Er:(Na,K)NbO₃ nanofibers

Grishin

Markova

2016

J Am Ceram Soc

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Dense homogeneous fabric composed from continuous bead‐free erbium‐doped sodium potassium niobate (Er:NKN) 100 μm long and 100‐200 nm in diameter nanofibers was sintered by sol‐gel calcination assisted electrospinning technique. X‐ray diffraction revealed preferential cube‐on‐cube [001]‐directional growth of fibers containing predominantly monoclinic Na0.35K0.65NbO3‐type phase and significantly less of tetragonal NbO2, cubic Er2O3, and monoclinic ErNbO4 phases. Er doping with the concentration of 2 at.% provides readily detectable room‐temperature broad‐band photoluminescence (PL) centered at λPL = 0.55 and 0.98 μm being pumped, respectively, with 532 and 785 nm lasers. Impedance spectroscopy and static electrical tests revealed ferroelectric properties, electric field induced resistance switching and strong rectification effect in nanoporous sandwich Au/Er:NKN/Pt capacitive cell. Memristor‐type current‐voltage (I‐V) characteristics originate from the electrochemical migration of oxygen vacancies at the n‐type NKN oxide/high work function Pt cathode junction interface.

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“…The green PL of Er 3 ions was selectively excited using a laser-induced up-conversion technique [19]. The energy level diagram of Er 3 and the excitation mechanism are shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The aim of this paper is to put clearly in evidence the simultaneous presence of fluoride and oxygen compensated erbium ions in Ca 1Àx Er x F 2x thin films x 0X01 ageing in air at room temperature (RT), from a laser-induced up-conversion technique [19].…”

Section: Introductionmentioning

confidence: 99%