Study on defects in hydrothermal-grown KBe2BO3F2 crystals

Yu, Jinqiu; Liu, Lijuan; Wang, Xiaoyang; Zhou, Haitao; He, Xin; Zhang, Changlong; Zhou, Wenbo; Chen, Chuangtian

doi:10.1016/j.jcrysgro.2010.09.082

Cited by 12 publications

(7 citation statements)

References 11 publications

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“…As follows from gen eral considerations, the contribution of the excitonic mechanism to energy transfer can be significant only in the case of high concentrations of the above defects, when the probability of exciton formation in the immediate vicinity of these centers increases. At the same time, detailed discussion of this problem at this stage would be hardly possible, because there are only a few studies of macroscopic defects in a real KBBF structure [24,25], and as for experimental works on point defects in KBBF, they are absent altogether.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Luminescence and electronic excitations in KBe2BO3F2 crystals

et al. 2012

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Abstract-This paper reports on a study of the dynamics of electronic excitations in KBe 2 BO 3 F 2 (KBBF) crystals by low temperature luminescent vacuum ultraviolet spectroscopy with nanosecond time resolution under photoexcitation by synchrotron radiation. The first data have been obtained on the kinetics of photo luminescence (PL) decay, time resolved PL spectra, time resolved PL excitation spectra, and reflection spectra at 7 K; the estimation has been performed for the band gap E g = 10.6-11.0 eV; the predominantly excitonic mechanism for PL excitation at 3.88 eV has been identified; and defect luminescence bands at 3.03 and 4.30 eV have been revealed. The channels of generation and decay of electronic excitations in KBBF crystals have been discussed.

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Section: Discussion Of the Resultsmentioning

confidence: 99%

Luminescence and electronic excitations in KBe2BO3F2 crystals

et al. 2012

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“…patterns of hydrothermally grown KBBF crystals contain three small unidentified peaks compared to the standard one [224]. From these evidences, it is confirmed that the poor SHG efficiency of hydrothermally grown KBBF crystals is mainly due to the structural defect.…”

Section: Kbe 2 Bo 3 F 2 (Kbbf) Family J183mentioning

confidence: 70%

Borate Nonlinear Optical Crystals for Frequency Conversion

2012

Nonlinear Optical Borate Crystals

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After the discovery of BBO and LBO during 1979-1987, many research groups are involved in this field because the borate NLO crystals have several outstanding advantages, such as the relative larger second harmonic generation (SHG) coefficients, wide transparent spectral range on the UV side, high damage threshold, and so on. As a result, more than 20 borate NLO crystals have been discovered till now. In this chapter, we will introduce several typical borate crystals, which have indicated important applications, particularly in laser industry. These borate crystals include (1) b-BaB 2 O 4 (BBO), the basic structural unit of which is (B 3 O 6 ) 3À group. (2) LiB 3 O 5 (LBO) family, including CsB 3 O 5 (CBO) and CsLiB 6 O 10 (CLBO), the basic structural unit of which is (

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“…However, the hydrothermally grown KBBF sample has a much lower conversion efficiency of 0.12% [13]. Initial research reveals that this low efficiency is caused by serious stacking faults along the c-axis that obstruct the nonlinear conversion [14,15]. We therefore infer that the occurrence of stacking faults in hydrothermally grown RBBF is much less compared with that in hydrothermally grown KBBF due to the different growth conditions and different cations.…”

Section: Characteristicsmentioning

confidence: 92%