First-principles Studies on Optical Absorption of [010] Screw Dislocation in KDP Crystal

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xuanyu Jiang ◽  
Yang Li ◽  
Liening Wei ◽  
Mingxia Xu ◽  
Lisong Zhang ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Screw Dislocation ◽  
First Principles ◽  
Electronic Structures ◽  
Density Functional ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Total System ◽  
Kdp Crystal ◽  
Potassium Dihydrogen

The structure, total system energies, electronic structures and optical absorption of the [010] screw dislocation in potassium dihydrogen phosphate (KH2PO4, KDP) crystal are investigated in the framework of density functional...

Hybrid density functional theory for the stability and electronic properties of Fe-doped cluster defects in KDP crystal

CrystEngComm ◽  
2021 ◽  
Author(s):  
Tingting Sui ◽  
Chubin Wan ◽  
Mingxia Xu ◽  
Xun Sun ◽  
Xinguang Xu ◽  
...  
Keyword(s):  
Density Functional ◽  
Potassium Dihydrogen Phosphate ◽  
Laser Damage ◽  
Dihydrogen Phosphate ◽  
Hybrid Density Functional Theory ◽  
Functional Theory ◽  
Kdp Crystal ◽  
Potassium Dihydrogen ◽  
The Stability ◽  
Hybrid Density Functional

Defects have always been considered as one of the important factors to reduce the laser damage thresholds of potassium dihydrogen phosphate (KH2PO4, KDP). However, defects in crystal often do not...

scholarly journals Optical Absorption Spectra of Vanadyl Ion (Impurities) in Three Host Crystal Compounds

1985 ◽  
Vol 40 (11) ◽  
pp. 1164-1166
Author(s):  
O. P. Agarwal ◽  
Prem Chand
Keyword(s):  
Optical Absorption ◽  
Potassium Dihydrogen Phosphate ◽  
Optical Data ◽  
Dihydrogen Phosphate ◽  
Host Crystal ◽  
Optical Absorption Study ◽  
Potassium Dihydrogen ◽  
Vanadyl Complexes ◽  
Vanadyl Ion ◽  
Magnesium Ammonium

Results of the optical absorption study of vanadyl ion doped in magnesium ammonium sulphate hexahydrate, rubidium sulphate and potassium dihydrogen phosphate single crystals at RT are reported. The nature of optical bands suggests a C4v symmetry of the Vanadyl complexes in conformity with the EPR results. Powder EPR data and optical data are correlated to obtain the MO coefficients.

scholarly journals First-principles study of dehydration process of potassium dihydrogen phosphate crystal

Heliyon ◽  
2019 ◽  
Vol 5 (3) ◽  
pp. e01384 ◽  
Author(s):  
Xiang Li ◽  
Pengfei Zhu ◽  
Lihong Han ◽  
Tao Zhang ◽  
Baonan Jia ◽  
...  
Keyword(s):  
First Principles ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Dehydration Process ◽  
Potassium Dihydrogen ◽  
First Principles Study

scholarly journals Elastic-plastic-brittle transitions of potassium dihydrogen phosphate crystals: characterization by nanoindentation

2020 ◽  
Vol 8 (4) ◽  
pp. 447-456
Author(s):  
Yong Zhang ◽  
Ning Hou ◽  
Liang-Chi Zhang ◽  
Qi Wang
Keyword(s):  
Plastic Deformation ◽  
Brittle Fracture ◽  
Optical Switching ◽  
Potassium Dihydrogen Phosphate ◽  
Machining Process ◽  
Fracture Mechanisms ◽  
Dihydrogen Phosphate ◽  
Kdp Crystal ◽  
Potassium Dihydrogen ◽  
Kdp Crystals

AbstractPotassium dihydrogen phosphate (KDP) crystals are widely used in laser ignition facilities as optical switching and frequency conversion components. These crystals are soft, brittle, and sensitive to external conditions (e.g., humidity, temperature, and applied stress). Hence, conventional characterization methods, such as transmission electron microscopy, cannot be used to study the mechanisms of material deformation. Nevertheless, understanding the mechanism of plastic-brittle transition in KDP crystals is important to prevent the fracture damage during the machining process. This study explores the plastic deformation and brittle fracture mechanisms of KDP crystals through nanoindentation experiments and theoretical calculations. The results show that dislocation nucleation and propagation are the main mechanisms of plastic deformation in KDP crystals, and dislocation pileup leads to brittle fracture during nanoindentation. Nanoindentation experiments using various indenters indicate that the external stress fields influence the plastic deformation of KDP crystals, and plastic deformation and brittle fracture are related to the material’s anisotropy. However, the effect of loading rate on the KDP crystal deformation is practically negligible. The results of this research provide important information on reducing machining-induced damage and further improving the optical performance of KDP crystal components.

scholarly journals Novel abrasive-free jet polishing mechanism for potassium dihydrogen phosphate (KDP) crystal

2018 ◽  
Vol 8 (4) ◽  
pp. 1012 ◽  
Author(s):  
Wei Gao ◽  
Lili Wang ◽  
Lunfu Tian ◽  
Pengfei Sun ◽  
Hui Dong ◽  
...  
Keyword(s):  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Kdp Crystal ◽  
Potassium Dihydrogen ◽  
Free Jet

A Study of Potassium Dihydrogen Phosphate (KDP) Crystal Surfaces by XPS

2001 ◽  
Vol 8 (1) ◽  
pp. 56-80 ◽  
Author(s):  
Mark Engelhard ◽  
Cheryl Evans ◽  
T. A. Land ◽  
A. J. Nelson
Keyword(s):  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Crystal Surfaces ◽  
Kdp Crystal ◽  
Potassium Dihydrogen

Measurement of quadratic electrogyration effect in KDP crystals for light propagating along the optical axis

2019 ◽  
Vol 52 (1) ◽  
pp. 158-167 ◽  
Author(s):  
Marek Izdebski
Keyword(s):  
Optical Axis ◽  
Potassium Dihydrogen Phosphate ◽  
High Sensitivity ◽  
Measurement Procedure ◽  
Measuring System ◽  
Dihydrogen Phosphate ◽  
Kdp Crystal ◽  
Potassium Dihydrogen ◽  
Electro Optic ◽  
Lock In

In this paper, a method of measuring the β31 coefficient of the quadratic electrogyration effect in potassium dihydrogen phosphate (KDP)-type crystals is proposed. It is shown that this very weak effect can be decoupled from other stronger effects occurring simultaneously in the real measuring system, even when small inaccuracies in crystal cutting and alignment are taken into account. Theoretical and numerical analyses are illustrated by experimental data obtained for the KDP crystal. High sensitivity, which is required for successful measurements at room and higher temperatures, has been achieved by using the polarimetric method for a light beam propagating along the optical axis of the crystal in combination with the lock-in technique and a new measurement procedure that compensates for the contribution of other effects such as electro-optic effects, natural birefringence and dichroism. It was found that the β31 coefficient measured at a wavelength of 632.8 nm decreases linearly from 2.53 × 10−21 m2 V−2 at a temperature of 298 K to 2.08 × 10−21 m2 V−2 at 343 K.

Research on Deliquescent Polishing Fluid for KDP Crystals

2009 ◽  
Vol 626-627 ◽  
pp. 53-58 ◽  
Author(s):  
Shao Long Guo ◽  
Fei Hu Zhang ◽  
Yong Zhang ◽  
Dian Rong Luan
Keyword(s):  
Removal Rate ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Kdp Crystal ◽  
Potassium Dihydrogen ◽  
Performance Requirements ◽  
Stability Experiment ◽  
Main Components ◽  
Polishing Fluid ◽  
Kdp Crystals

The characteristics and principle of deliquescent polishing technology for potassium dihydrogen phosphate (KDP) crystals are introduced, and the performance requirements of deliquescent polishing fluid for KDP crystals are proposed. The main components of the deliquescent polishing fluid for KDP crystals were selected according to these performance requirements. Through uniformity experiment, stability experiment and fluidity experiment, uniformity, stability and fluidity of deliquescent polishing fluid for KDP crystals prepared using the selected components were tested. Through deliquescent polishing experiment of KDP crystal, polishing performance of deliquescent polishing fluid compounded using the selected components was tested. The material removal rate of the KDP crystal in the deliquescent polishing experiment was 6.03μm/min, and the surface roughness of the KDP crystal after deliquescent polishing was 4.857nm. The experimental results show that the compounded deliquescent polishing fluid for KDP crystals has good polishing performance and can reach the requirements.

Optical absorption at 106 μm in highly deuterated potassium dihydrogen phosphate

1992 ◽  
Vol 31 (12) ◽  
pp. 1960 ◽  
Author(s):  
Chris A. Ebbers ◽  
Jim Happe ◽  
Norm Nielsen ◽  
Stephan P. Velsko
Keyword(s):  
Optical Absorption ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen
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