scholarly journals A Study on Spectral and Morphological Analysis on Unidirectional Neodymium Doped KDP Single Crystal

2020 ◽  
Vol 13 (3) ◽  
pp. 257-264
Author(s):  
Roopa V.
Keyword(s):  
Electron Microscope ◽  
Single Crystal ◽  
Morphological Analysis ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Potassium Dihydrogen ◽  
Transmission Electron ◽  
Potassium Dihydrogen Orthophosphate ◽  
Sr Method ◽  
Dihydrogen Orthophosphate

A nonlinear optical unidirectional <101> Single crystal of Neodymium doped Potassium dihydrogen orthophosphate (KDP) was grown by Sankaranarayanan-Ramasamy (SR) method. The <101> oriented seed crystals were mounted at the bottom of the glass ampoule and the crystal of 16mm diameter; 120mm length were grown by SR method. The laser damage threshold was measured using Q-switched Nd:YAG laser (1064 nm) and was found to be 5.456 Gwcm-2 respectively.The presence of functional groups was examined by Fourier transform infrared (FTIR) analysis. The surface morphology and dislocations along <101> plane was observed using Scanning electron microscope (SEM) and Transmission electron microscope (TEM).

Growth of unidirectional potassium dihydrogen orthophosphate single crystal by SR method and its characterization

2008 ◽  
Vol 62 (24) ◽  
pp. 3963-3965 ◽  
Author(s):  
S. Balamurugan ◽  
G. Bhagavannarayana ◽  
P. Ramasamy
Keyword(s):  
Single Crystal ◽  
Potassium Dihydrogen ◽  
Potassium Dihydrogen Orthophosphate ◽  
Sr Method ◽  
Dihydrogen Orthophosphate

Reconstruction of electron holograms recorded in a non-FEG, non-biprism TEM

1995 ◽  
Vol 53 ◽  
pp. 618-619
Author(s):  
Z.L. Wang
Keyword(s):  
Electron Microscope ◽  
Single Crystal ◽  
Experimental Technique ◽  
Transmission Electron Microscope ◽  
The Other ◽  
Electron Holography ◽  
Transmission Electron ◽  
Coherent Sources ◽  
Imaging Theory ◽  
Normal Specimen

An experimental technique for performing electron holography using a non-FEG, non-biprism transmission electron microscope (TEM) has been introduced by Ru et al. A double stacked specimens, one being a single crystal foil and the other the specimen, are loaded in the normal specimen position in TEM. The single crystal, which is placed onto the specimen, is responsible to produce two beams that are equivalent to two virtual coherent sources illuminating the specimen beneath, thus, permitting electron holography of the specimen. In this paper, the imaging theory of this technique is described. Procedures are introduced for digitally reconstructing the holograms.

Observation of dislocations in dynamically loaded Cu-SiO2

1986 ◽  
Vol 44 ◽  
pp. 424-425
Author(s):  
D. S. Pritchard
Keyword(s):  
Electron Microscope ◽  
Strain Rate ◽  
Single Crystal ◽  
Transmission Electron Microscope ◽  
Volume Fraction ◽  
Screw Dislocations ◽  
Spherical Inclusions ◽  
Transmission Electron ◽  
Crystal Dispersion ◽  
Strain Rate Loading

The effect of varying the strain rate loading conditions in compression on a copper single crystal dispersion-hardened with SiO2 particles has been examined. These particles appear as small spherical inclusions in the copper lattice and have a volume fraction of 0.6%. The structure of representative crystals was examined prior to any testing on a transmission electron microscope (TEM) to determine the nature of the dislocations initially present in the tested crystals. Only a few scattered edge and screw dislocations were viewed in those specimens.

Growth, optical, mechanical, thermo-physical, laser damage threshold (LDT) and Z-scan studies on dilithium succinate single crystal for optical limiting applications

2019 ◽  
Vol 30 (6) ◽  
pp. 6287-6299 ◽  
Author(s):  
R. Ragu ◽  
M. Akilan ◽  
J. P. Angelena ◽  
P. S. Latha Mageshwari ◽  
S. Jerome Das
Keyword(s):  
Single Crystal ◽  
Damage Threshold ◽  
Optical Limiting ◽  
Laser Damage Threshold ◽  
Laser Damage
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