IR luminescence decays and radiative lifetime of the level in Er3+ doped sol-gel TiO2 planar waveguides

Bahtat, A.; Lucas, M.C. Marco de; Jacquier, B.; Varrel, B.; Bouazaoui, Mohamed; Mugnier, J.

doi:10.1016/s0925-3467(97)00016-5

Cited by 29 publications

(15 citation statements)

References 14 publications

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“…In the case of excitation at 514.5 nm with a power of 24 mW the signal is too low to allow the recording of the decay curve behavior but exciting at 980 nm with power of 200 mW it is possible record the decay curve. Also in this configuration the measured lifetime is of around 300 μs as obtained upon excitation at 514.5 nm with power of 185 mW, that is one order of magnitude lower than the expected values of the lifetime of the 4 I 13/2 level of Er 3+ ions in SiO 2 [26] and TiO 2 [27] matrices. We need to consider that is already observed in active microcavity [28] also doped with rare earth ions [29] a drastic decrease of the spontaneous emission lifetime with a decreasing that depends on the quality factor of the structures.…”

Section: Discussionmentioning

confidence: 56%

Coherent emission from fully Er3+ doped monolithic 1-D dielectric microcavity fabricated by rf-sputtering

Chiasera¹,

Meroni

Scotognella

et al. 2019

Optical Materials

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All Er 3+ doped dielectric 1-D microcavity was fabricated by rf sputtering technique. The microcavity was constituted by half wave Er 3+ doped SiO 2 active layer inserted between two Bragg reflectors consists of ten pairs of SiO 2/ TiO 2 layers also doped with Er 3+ ions. The scanning electron microscopy was used to check the morphology of the structure. Transmission measurements confirm the third and first order cavity resonance at 530 nm and 1560 nm, respectively. The photoluminescence measurements were obtained by optically exciting at the third order cavity resonance using 514.5 nm Ar + laser with an excitation angle of 30°. The Full Width at Half Maximum of the emission peak at 1560 nm decrease with the pump power until the spectral resolution of the detection system of ∼1.0 nm. Moreover, the emission intensity presents a non-linear behavior with the pump power and a threshold at about 24 mW was observed with saturation of the signal at above 185 mW of pump power.

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Section: Discussionmentioning

confidence: 56%

Coherent emission from fully Er3+ doped monolithic 1-D dielectric microcavity fabricated by rf-sputtering

Chiasera¹,

Meroni

Scotognella

et al. 2019

Optical Materials

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“…It is believed that surface hydroxyls, which partially remain even after annealing, are responsible for the lower luminescence intensity of the “co‐precipitated” powder. Hydroxyl groups are known to increase the probability of nonradiative relaxations of erbium ions, 16 while their complete decomposition needs a heat treatment at ∼1000°C 17 . For the plasma‐synthesized nanopowders, the 0.5 at% sample (line d) has a luminescence intensity about two times that of the 0.25 at% one (line c).…”

Section: Resultsmentioning

confidence: 99%

Energy Transfer Enables 1.53 μm Photoluminescence from Erbium‐Doped TiO₂ Semiconductor Nanocrystals Synthesized by Ar/O₂ Radio‐Frequency Thermal Plasma

Wang

Tang

et al. 2008

Journal of the American Ceramic Society

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Highly crystalline, highly luminescent nanopowders of Er3+‐doped TiO2 have been successfully synthesized via one‐step Ar/O2 radio‐frequency thermal plasma processing. Energy transfer from the TiO2 host to Er3+ activators has been confirmed by combined means of UV‐vis, excitation, and photoluminescence spectroscopies. As a consequence, bright photoluminescence at ∼1.53 μm was observed from the nanopowders either by directly exciting the Er3+ activator or by exciting the TiO2 host lattice. A comparative study shows that the nanopowder of the same system made via coprecipitation lacks the energy transfer. The plasma‐generated nanopowders may thus find applications in optoelectronic devices.

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“…22 Unfortunately, the LGdH matrix doped with Eu 3+ does not yield high quantum efficiency because the many hydroxyl groups in the layer greatly increase the probability of nonradiative transitions. 23 For this reason, in an initial research regarding the PL properties of LEuH or Eu 3+ -doped LRHs, the 7 F 0 -5 L 6 intra 4f 6 excitation of Eu 3+ at B396 nm has been mainly used for red emission. 5c,11b,13b During the study to evaluate the emission intensity from the Eu 3+ doped into the LRH hydroxocation layer, we observed that the UV absorption of the interlayer anions is of critical importance in the PL properties.…”

Section: Photoluminescence Spectra Of Lgdh:eu As a Function Of Interl...mentioning

confidence: 99%

Relationship between interlayer anions and photoluminescence of layered rare earth hydroxides

et al. 2015

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The effect of interlayer anions on the photoluminescence of layered rare earth hydroxides was investigated with the rare earth (RE)-doped layered gadolinium hydroxynitrate as a representative base matrix for efficient and stable anion-exchange reactions. Eu 3+ , Tb 3+ , and Ce 3+ were employed as RE activator ions for red, green, and blue emissions, respectively. The excitation and emission behaviors of Gd 1.80 RE 0.20 (OH) 5 XÁnH 2 O (LGdH:RE) were systematically compared for various interlayer inorganic and organic anions, where X = F À , Cl À , I À , OH À , ClO 3 À , S 2À , CO 3 2À , SO 4 2À , terephthalate, 2-naphthoate, and dodecylsulfate members were obtained by the exchange reaction of corresponding X = NO 3 À members.Interestingly, a close relationship was found between the UV-Vis absorption spectra of aqueous solutions containing X anions and the excitation behavior of LGdH:RE. Thus, NO 3 À , I À , and S 2À anions showing high absorbance in aqueous solution consistently shielded the excitation light for the 8 S 7/2 -6 I J transition of Gd 3+ and the 4f -5d interconfigurational transitions of Tb 3+ and Ce 3+ to turn off the corresponding emissions from LGdH:Eu, LGdH:Tb, and LGdH:Ce. In contrast, the effect of terephthalate and 2-naphthoate, despite high absorbance in aqueous solutions, was significantly different depending on the RE activator ion. It is proposed that an identical interlayer anion in the gallery of LRHs can filter or sensitize the UV energy for excitation of RE 3+ -doped LRHs and its role (whether as a filter, a sensitizer, or just a spacer) is determined by the nature of activator ions. 201-2457 † Electronic supplementary information (ESI) available: Additional XRD patterns and FT-IR spectra of Gd 1.80 RE 0.20 (OH) 5 XÁnH 2 O (LGdH:RE) where RE = Eu, Tb, and Ce and X = NO 3 À , F À , Cl À , I À , OH À , ClO 3 À , S 2À , CO 3 2À , SO 4 2À , terephthalate, 2-naphthoate, and dodecylsulfate. XRD patterns measured as a function of reaction time during the exchange reaction of Gd 1.80 Ce 0.20 (OH) 5 NO 3 ÁnH 2 O with Cl À and vice versa. See

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IR luminescence decays and radiative lifetime of the level in Er3+ doped sol-gel TiO2 planar waveguides

Cited by 29 publications

References 14 publications

Coherent emission from fully Er3+ doped monolithic 1-D dielectric microcavity fabricated by rf-sputtering

Coherent emission from fully Er3+ doped monolithic 1-D dielectric microcavity fabricated by rf-sputtering

Energy Transfer Enables 1.53 μm Photoluminescence from Erbium‐Doped TiO₂ Semiconductor Nanocrystals Synthesized by Ar/O₂ Radio‐Frequency Thermal Plasma

Relationship between interlayer anions and photoluminescence of layered rare earth hydroxides

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IR luminescence decays and radiative lifetime of the level in Er3+ doped sol-gel TiO2 planar waveguides

Cited by 29 publications

References 14 publications

Coherent emission from fully Er3+ doped monolithic 1-D dielectric microcavity fabricated by rf-sputtering

Coherent emission from fully Er3+ doped monolithic 1-D dielectric microcavity fabricated by rf-sputtering

Energy Transfer Enables 1.53 μm Photoluminescence from Erbium‐Doped TiO2 Semiconductor Nanocrystals Synthesized by Ar/O2 Radio‐Frequency Thermal Plasma

Relationship between interlayer anions and photoluminescence of layered rare earth hydroxides

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Energy Transfer Enables 1.53 μm Photoluminescence from Erbium‐Doped TiO₂ Semiconductor Nanocrystals Synthesized by Ar/O₂ Radio‐Frequency Thermal Plasma