Remarkable enhancement in crystalline perfection, second harmonic generation efficiency, optical transparency, and laser damage threshold in potassium dihydrogen phosphate crystals by L-threonine doping

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3456995· OSTI ID:21476399

Kushwaha, S K; Maurya, K K; Bhagavannarayana, G ^[1]; Shakir, Mohd ^[2]; Shah, A L ^[3]; Wahab, M A ^[4]

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1. Materials Characterization Division, National Physical Laboratory, Council of Scientific and Industrial Research, New Delhi 110 012 (India)
2. Materials Characterization Division, National Physical Laboratory, Council of Scientific and Industrial Research, New Delhi 110 012 (India) and Department of Physics, Crystal growth Laboratory, Jamia Millia Islamia, New Delhi 110 025 (India)
3. Solid State Laser Division, LASTEC, Metcalfe House, New Delhi 110 054 (India)
4. Department of Physics, Crystal growth Laboratory, Jamia Millia Islamia, New Delhi 110 025 (India)

Effect of L-threonine (LT) doping on crystalline perfection, second harmonic generation (SHG) efficiency, optical transparency, and laser damage threshold (LDT) in potassium dihydrogen phosphate (KDP) crystals grown by slow evaporation solution technique (SEST) has been investigated. The influence of doping on growth rate and morphology of the grown crystals has also been studied. Powder x-ray diffraction data confirms the crystal structure of KDP and shows a systematic variation in intensity of diffraction peaks in correlation with morphology due to varying LT concentration. No extra phase formation was observed which is further confirmed by Fourier transform Raman (FT-Raman) studies. High-resolution x-ray diffraction curves indicate that crystalline perfection has been improved to a great extent at low concentrations with a maximum perfection at 1 mol % doping. At higher concentrations (5 to 10 mol %), it is slightly reduced due to excess incorporation of dopants at the interstitial sites of the crystalline matrix. LDT has been increased considerably with increase in doping concentration, whereas SHG efficiency was found to be maximum at 1 mol % in correlation with crystalline. The optical transparency for doped crystals has been increased as compared to that of pure KDP with a maximum value at 1 mol % doping.

• OSTI ID: 21476399
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 3; Other Information: DOI: 10.1063/1.3456995; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CORRELATIONS
CRYSTAL DOPING
CRYSTAL GROWTH
CRYSTALS
DOPED MATERIALS
EVAPORATION
FOURIER TRANSFORMATION
HARMONIC GENERATION
INTERSTITIALS
MORPHOLOGY
OPACITY
POTASSIUM PHOSPHATES
POWDERS
RAMAN SPECTRA
RESOLUTION
THREONINE
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
AMINO ACIDS
CARBOXYLIC ACIDS
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFRACTION
FREQUENCY MIXING
HYDROXY ACIDS
INTEGRAL TRANSFORMATIONS
MATERIALS
OPTICAL PROPERTIES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
POTASSIUM COMPOUNDS
SCATTERING
SPECTRA
TRANSFORMATIONS