Ion-Pair Resonance Mechanism of Energy Transfer in Rare Earth Crystal Fluorescence

Varsanyi, F.; Dieke, G. H.

doi:10.1103/physrevlett.7.442

Cited by 234 publications

(37 citation statements)

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“…For the M' modification Brixner and Chen (7) have reported the same observation. This is remarkable, because at low concentration the Tb 3+ emission consists usually of mainly 5D 3 emission which is quenched for higher concentrations by cross-relaxation resulting more 5D 4 emission (13). An explanation for the low 5Dq/5DA ratio in in the low concentrated sample can be clustering of the Tb 3 ions due to incomplete reaction, so that cross-relaxation can take place even at low concentrations.…”

Section: Resultsmentioning

confidence: 96%

Energy transfer phenomena in Tb3+-activated gadolinium tantalate (GdTaO4)

Lammers

Blasse

1984

Materials Research Bulletin

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The energy transfer phenomena in GdTaO 4 activated with Tb 3+ have been investigated. It is shown that the ratio of the 5D 3 and 5D 4 emission intensities of Tb 3+ depends strongly on the excitation wavelength. The Tb 3+ 5D 3 level is populated by direct excitation into the Tb 3+ 4f 8 levels, by energy transfer from the Gd 3+ 6p level or by energy transfer from the intrinsic tantalate group via the Gd 3+ 6p level. The Tb 3+ 5D 4 level is populated by direct excitation into the 4f75d state, by energy transfer from the Gd 3+ 61 level, or by cross-relaxation from the 5D 3 level. Direct relaxation from 5D 3 to 5D 4 is found to be improbable. The 61 ÷ 6p 3+ relaxation of the excited Gd ion is slow in comparison with the competing energy transfer processes.

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Section: Resultsmentioning

confidence: 96%

Energy transfer phenomena in Tb3+-activated gadolinium tantalate (GdTaO4)

Lammers

Blasse

1984

Materials Research Bulletin

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“…Such a process is equivalent to the cooperative absorption of single photons by pairs of rareearth ions in crystals. 33 The experimental results are presented in Fig. 6͑a͒ where one can clearly see the anticrossing at doubled resonance frequency ϳ15.7 GHz with a magnitude now of ͱ 2v Ќ ϳ 30 MHz.…”

Section: Single-photon Spectroscopy Of Upper Hybridized Statesmentioning

confidence: 99%

Multiphoton spectroscopy of a hybrid quantum system

et al. 2010

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We report on experimental multiphoton spectroscopy of a hybrid quantum system consisting of a superconducting phase qubit coherently coupled to an intrinsic two-level system ͑TLS͒. We directly probe hybridized states of the combined qubit-TLS system in the strongly interacting regime, where both the qubit-TLS coupling and the driving cannot be considered as weak perturbations. This regime is described by a theoretical model which incorporates anharmonic corrections, multiphoton processes and decoherence. We present a detailed comparison between experiment and theory and find excellent agreement over a wide range of parameters.

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“…All of these observed 2-c excitations are associated with two identical valence excitations (except that of Ref. [2] which involves different valence excitations) and are observed in the UV region well below Rehr and co-workers [6,7]. The input data for these calculations include the coordinates for 87 atoms (which form 6 shells with an fcc lattice constant of 4.463A [8]), the sample temperature (6.3K), the Debye temperature (66.0K) [9], and a choice for the self-energy as described below.…”

Section: Abstract (Maximum 200 Words)mentioning

confidence: 99%

Two-center two-electron excitations identified in NEXAFS for solid Ne

1996

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REPORT DOCUMENTATION PAGEForm Aoved PIO( t O'l'ft l b..dtn tfo tlhsi cQIIeCOn 0 flIO rmatO,|o-estin*atro to a (verge I hour tponje• including the timc ot recviewing in t.uction. seta(Ching exq sinst gt dA a $Out(,, g14ther'*n O .14 antn~ n the data needed. And Cinplt elmtg and tev.€i *ng the QI1CCUen or i* .taon. S cnd (onment$ Aiedgdrnq this burden cisrt imt, 0 any other jS•p(t O0 th,.s collec'.o. of nIlor. At.On. nc:lud-mg S.ggetiOns 10, r ,educing this b cden. Experimental K-edge NEXAFS (near edge X-ray absorption fine structure) data for solid Ne are compared with theoretical results. Seven features in the experimental spectrum that are not reproduced by the theoretical results are found to be attributable to two-electron excitations. Five of them are usual one-center excitations, but the remaining two are found to be novel two-center excitations involving resonant orbitals as opposed to the usual bound orbitals. In contrast, twocenter, two-electron excitations involving only bound orbitals are found to be absent in the experimental spectrum.PACS numbers: 78.70.Dm, 32.30.Rj, 71.90.+qIn photo-absorption spectra, one-electron (l-e) excitations normally dominate the spectra for obvious reasons. Much weaker two-electron (2-e) shakeup excitations, nevertheless, have been observed in many atomic, molecular, and solid systems. In solids and molecules, these 2-e excitations can be either one-center ( Rehr and co-workers [6,7]. The input data for these calculations include the coordinates for 87 atoms (which form 6 shells with an fcc lattice constant of 4.463A [8]), the sample temperature (6.3K), the Debye temperature (66.0K) [9], and a choice for the self-energy as 3 described below. All other information, including the core lifetime, are internally provided by the code. We have performed full MS calculations incorporating the maximum number of paths that the code allows. In Ne solid, the inelastic mean free path of the photoelectrons is very long (>80,k) for electron energies less than 20eV but rapidly decreases to 20A above 30eV [10]. In order to include this large variation in the mean free path, we have performed two calculations, one without inelastic loss [theory (a)] and one with inelastic loss [theory (b)]. We employed the ground-state, exchange-correlation potential with a zero imaginary part for (a) and the complex Hedin-Lundquist self-energy for (b). Thus, the theoretical result (a) simulates the experimental spectrum below 30eV and (b), above 30eV. These sections of the spectra are indicated by solid lines in Fig. I and represent our theoretical spectrum.The sharpest peak (El) in the experimental solid Ne spectrum closely resembles the Is -+ 3 p excitation peak for gaseous Ne, so that peak E 1 has been attributed to the ls--*3pexciton [5]. The FEFF6 model is limited to an "extended" continuum spectrum above the Below we shall discuss the origins of those Di features.The structure comprising the D 3 -D 5 features is virtually identical to the structure observed in the NEXAFS of gaseous Ne [11] except for...

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Ion-Pair Resonance Mechanism of Energy Transfer in Rare Earth Crystal Fluorescence

Cited by 234 publications

References 4 publications

Energy transfer phenomena in Tb3+-activated gadolinium tantalate (GdTaO4)

Energy transfer phenomena in Tb3+-activated gadolinium tantalate (GdTaO4)

Multiphoton spectroscopy of a hybrid quantum system

Two-center two-electron excitations identified in NEXAFS for solid Ne

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