Growth, anisotropic spectroscopy and laser operation of the monoclinic Nd:KGd(PO<sub>3</sub>)<sub>4</sub>crystal

Solé, R.; Pujol, María Cinta; Aguiló, Magdalena; Díaz, Francesc; Brenier, A.

doi:10.1088/0022-3727/48/49/495502

Cited by 6 publications

(10 citation statements)

References 42 publications

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“…The cerium distribution coefficient is larger than one; this means that the Ce 3+ distribution inside the crystal may be not homogeneous. Besides, the distribution coefficient of Ce 3+ is larger than the observed one for Yb and similar to the one reported for Nd 18,24 . This last fact can be related to the different ionic radii of the lanthanide doping ions.…”

Section: Resultssupporting

confidence: 88%

“…In previous reports, the crystal growth rate was around 8-9 × 10 −3 g·h −1 for undoped KGdP 25 and around 7 × 10 −3 g·h −1 for Nd-doped KGdP 18 . Several reasons can induce this slower crystal growth, which are the different composition of the solution with a reduced amount of solute in it, the total mass of the solution which in the present work is lower, and finally, the presence of cerium in the solution.…”

Section: Resultsmentioning

confidence: 76%

“…First, the energy of the onset of the fundamental absorption ( E fa ) of type III KGdP has been established at 172 nm (7.22 eV) by overlapping a straight line along the ultraviolet absorption edge observed in the transmission spectrum of Nd:KGd(PO 3 ) 4 crystal 18 . This same procedure was used in the work done by Ueda et al .…”

Section: Resultsmentioning

confidence: 99%

“…Besides, it is a deep-ultraviolet crystal closing at 160 nm 18 indicating a large band gap, which potentially could allow that the 5 d energy levels of some Ln 3+ ions be located between the conduction band and the valence band.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, we have already reported the feasibility of growing these crystals within the non-centrosymmetric monoclinic crystalline phase with high crystalline quality 18,22 . This compound presents a polymorphism related to the degree of condensation of the phosphoric anions: the PO 4 forms chains in the type III phase (space group: P 2 1 ) and type IV phase (space group: P 2 1 / n) , belonging to the group of polyphosphates, and the PO 4 forms rings in the type B phase (space group: C 2/ c ) belonging to the group of cyclophosphates 22 .…”

Section: Introductionmentioning

confidence: 99%

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Single crystal growth, optical absorption and luminescence properties under VUV-UV synchrotron excitation of type III Ce3+:KGd(PO3)4, a promising scintillator material

Adell¹,

Solé²,

Pujol³

et al. 2018

Sci Rep

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Scintillator materials have gained great interest for many applications, among which the medical applications stand out. Nowadays, the research is focused on finding new scintillator materials with properties that suit the needs of each application. In particular, for medical diagnosis a fast and intense response under high-energy radiation excitation is of great importance. Here, type III Ce3+-doped KGd(PO3)4 single crystals with high crystalline quality are grown and optically characterized as a new promising scintillator material. The 4f → 5d electronic transitions of Ce3+ are identified by optical absorption. The optical absorption cross section of Ce3+ for the electronic transition from the 2F5/2 to the 5d1 level is 370 × 10−20 cm2. The luminescence of KGd0.996Ce0.004(PO3)4 crystal by exciting the 5d levels of Ce3+ with VUV-UV synchrotron radiation shows down-shifting properties with strong emissions at 322 and 342 nm from the 5d1 to 2F5/2 and 2F7/2 levels of Ce3+ with a short decay time of ~16 ns, which is very suitable for scintillator applications. Moreover, these intense emissions are also observed when Gd3+ is excited since an energy transfer from Gd3+ to Ce3+ exists.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Single crystal growth, optical absorption and luminescence properties under VUV-UV synchrotron excitation of type III Ce3+:KGd(PO3)4, a promising scintillator material

Adell¹,

Solé²,

Pujol³

et al. 2018

Sci Rep

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Lasing with conical diffraction feature in the KGd(WO4)2:Nd biaxial crystal

Brenier

2016

Appl. Phys. B

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With an experimental set-up designed to record simultaneously the far field and the near field patterns, we got lasing with feature of conical diffraction in the biaxial Nd 3+ -doped KGd(WO 4 ) 2 crystal. The key-point is that the lasing direction is not single and is constituted by an angular distribution including the optical axis. Very slight changes of crystal orientation leads to crescent shape 1068 nm light distributions in the near field. The beam launched towards the biaxial crystal is mainly linear polarized with its intensity in agreement with the Nd fluorescence angular distribution. A theoretical background is provided, including the monoclinic and triclinic symmetries and laser amplification including elliptical modes and cavity round trip.

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Growth, spectroscopy and lasing of the Yb-doped monoclinic Gd2SiO5 in the prospect of hydrogen laser cooling with Lyman-α radiation

et al. 2016

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Growth, anisotropic spectroscopy and laser operation of the monoclinic Nd:KGd(PO₃)₄crystal

Cited by 6 publications

References 42 publications

Single crystal growth, optical absorption and luminescence properties under VUV-UV synchrotron excitation of type III Ce3+:KGd(PO3)4, a promising scintillator material

Single crystal growth, optical absorption and luminescence properties under VUV-UV synchrotron excitation of type III Ce3+:KGd(PO3)4, a promising scintillator material

Lasing with conical diffraction feature in the KGd(WO4)2:Nd biaxial crystal

Growth, spectroscopy and lasing of the Yb-doped monoclinic Gd2SiO5 in the prospect of hydrogen laser cooling with Lyman-α radiation

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Growth, anisotropic spectroscopy and laser operation of the monoclinic Nd:KGd(PO3)4crystal

Cited by 6 publications

References 42 publications

Single crystal growth, optical absorption and luminescence properties under VUV-UV synchrotron excitation of type III Ce3+:KGd(PO3)4, a promising scintillator material

Single crystal growth, optical absorption and luminescence properties under VUV-UV synchrotron excitation of type III Ce3+:KGd(PO3)4, a promising scintillator material

Lasing with conical diffraction feature in the KGd(WO4)2:Nd biaxial crystal

Growth, spectroscopy and lasing of the Yb-doped monoclinic Gd2SiO5 in the prospect of hydrogen laser cooling with Lyman-α radiation

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Growth, anisotropic spectroscopy and laser operation of the monoclinic Nd:KGd(PO₃)₄crystal