Transient optical absorption and luminescence in Li2B4O7 lithium tetraborate

Огородников, И. Н.; Yakovlev, V. Yu.; Кружалов, А. В.; Исаенко, Л. И.

doi:10.1134/1.1485012

Cited by 20 publications

(33 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in a satisfactory agreement with the experimental TOA spectra (Fig. 1) The local level of the trapped hole center in these crystal forms through the splitting of states from the VB top to the band gap near a negatively charged defect: a hydrogen vacancy in phosphates [3] and a lithium vacancy in borates [4,5]. The trapped hole center forms when the hole is localized at the oxygen atom near the vacancy.…”

Section: Figsupporting

confidence: 80%

“…Figure 1 demonstrates the transient optical absorption spectra for crystals ADP, KDP, LTB and LBO measured at 290 K. A detailed comparison of the main properties of TOA in these crystals argues convincingly in favor of their similarity. According to the model proposed by us earlier [3][4][5], the optical absorption of undoped ADP, KDP, LTB and LBO in the visible and UV regions of the spectrum is produced by optical hole-transitions from the local defect level to states in the valence band (VB) of the crystal. The TOA spectral profile is determined here to a considerable extent by the VB density of the states.…”

Section: Methodsmentioning

confidence: 99%

“…We used in the study undoped crystals of ADP, KDP, LTB and LBO, whose growth technologies were described in [3][4][5]. The samples measured 8×8×1 mm 3 and had laserquality polished plane-parallel surfaces.…”

Section: Methodsmentioning

confidence: 99%

“…The specifics of the experiment are outlined in our previous publication [3][4][5]. The pump pulse duration used in the measurements of the dependence of transient optical absorption (TOA) and pulsed cathodoluminescence (PCL) on the pump power were kept constant.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Ionic and electronic processes in non‐linear optical crystals

Огородников¹,

Yakovlev

2005

phys. stat. sol. (c)

View full text Add to dashboard Cite

The paper presents the results of a study of the formation and decay of lattice defects in nonlinear optical crystals of NH 4 H 2 PO 4 (ADP), KH 2 PO 4 (KDP), Li 2 B 4 O 7 (LTB) and LiB 3 O 5 (LBO) with a sublattice of mobile hydrogen (ADP, KDP) and lithium (LTB, LBO) cations. By means of the luminescent and absorption optical spectroscopy with (the) a nanosecond time resolution under excitation with an electron beam, it was revealed that the optical absorption of these crystals in the visible and UV spectral ranges is produced by optical hole-transitions from the local defect level to the valence band states. The valence band density of the states determines the optical absorption spectral profile, and the relaxation kinetics is rated by the interdefect radiationless tunnel recombination between the trapped hole center and the H 0 and Li 0 electron trapped centers. At 290 K, the H 0 and Li 0 centers are subject to thermally stimulated migration. All manifestations of a radiative recombination observed in these crystals are accounted for by the involvement of additional electronic and hole centers of a different nature in the recombination process.

show abstract

Section: Figsupporting

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Ionic and electronic processes in non‐linear optical crystals

Огородников¹,

Yakovlev

2005

phys. stat. sol. (c)

View full text Add to dashboard Cite

show abstract

“…This problem becomes particularly acute in the case of lightweight mobile small-radius cations, for instance, in lithium borate crystals. In our previous research works, this aspect was studied in the particular example of crystals with a lattice of mobile lithium cations (Li 2 B 4 O 7 ( Q1 Ogorodnikov et al, 2002a,b), LiB 3 O 5 (Ogorodnikov et al, 2003)) and model dihydrophosphates with a sublattice of mobile hydrogen cations (NH 4 H 2 PO 4 and KH 2 PO 4 (Ogorodnikov et al, 2002a)). …”

Section: Introductionmentioning

confidence: 99%