Effect of l-alanine, Mn(II) and glycine dopants on the structural, crystalline perfection, second harmonic generation (SHG), dielectric and mechanical properties of BTCA single crystals

2012 ◽  
Vol 137 (1) ◽  
pp. 276-281 ◽  
Author(s):  
V. Ganesh ◽  
T. Bhaskar Rao ◽  
K. Kishan Rao ◽  
G. Bhagavannarayana ◽  
Mohd. Shkir
Keyword(s):  
Mechanical Properties ◽  
Second Harmonic Generation ◽  
Single Crystals ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Crystalline Perfection ◽  
Dielectric And Mechanical Properties

Enhancement of second harmonic generation, optical and dielectric properties inL-asparagine monohydrate single crystals due to an improvement in crystalline perfection by annealing

2010 ◽  
Vol 43 (3) ◽  
pp. 491-497 ◽  
Author(s):  
Mohd. Shakir ◽  
S. K. Kushawaha ◽  
K. K. Maurya ◽  
Sumeet Kumar ◽  
M. A. Wahab ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Second Harmonic Generation ◽  
Single Crystals ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
X Ray Diffraction ◽  
Crystalline Perfection ◽  
Second Harmonic Generation Efficiency ◽  
X Ray ◽  
Asparagine Monohydrate

Single crystals of the relatively new nonlinear optical material L-asparagine monohydrate have been successfully grown by the slow evaporation solution growth technique at room temperature in aqueous solution. The crystal system of the title material has been confirmed by powder X-ray diffraction. The crystalline perfection of the as-grown and annealed crystals has been evaluated by high-resolution X-ray diffraction. The as-grown single crystals (particularly when their size is large) were found to contain internal structural grain boundaries, and the crystalline perfection of these crystals was found to be improved substantially by annealing at low temperatures. The crystalline perfection and the measured physical properties were found to be correlated such that the second harmonic generation efficiency, optical transparency, fluorescence and dielectric properties are enhanced as the crystal quality improves.

Temperature dependences of the second-harmonic generation in LiKB4O7 single crystals

Laser Physics ◽  
2008 ◽  
Vol 18 (8) ◽  
pp. 965-967 ◽  
Author(s):  
K. Nouneh ◽  
I. V. Kityk ◽  
K. Michalska-Małecka ◽  
K. Ozga ◽  
V. T. Adamiv ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Single Crystals ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Temperature Dependences

Second-harmonic generation from needlelike ferroelectric domains in Sr0.6Ba0.4Nd2O6 single crystals

1998 ◽  
Vol 73 (6) ◽  
pp. 768-770 ◽  
Author(s):  
Satoru Kawai ◽  
Tomoya Ogawa ◽  
Howard S. Lee ◽  
Robert C. DeMattei ◽  
Robert S. Feigelson
Keyword(s):  
Second Harmonic Generation ◽  
Single Crystals ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Ferroelectric Domains

The Growth of Organic Single Crystals in Glass Capillaries for Second Harmonic Generation

1989 ◽  
Vol 152 ◽  
Author(s):  
Geoffrey E. Holdcroft ◽  
P. L. Dunn ◽  
J. D. Rush
Keyword(s):  
Refractive Index ◽  
Second Harmonic Generation ◽  
Single Crystals ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Second Harmonic ◽  
Average Power ◽  
Single Mode ◽  
Glass Capillary ◽  
Fibre Direction

ABSTRACTThe growth and characterisation of a number of organic single crystals, e.g. benzil, 2–methyl–4– nitroaniline and 2–N,N–dimethylamino–5–nitroacetanilide, in silica capillary has become fairly well established over recent years. [1–6 ] However the growth of these same compounds in glass capillary with a much higher refractive index than silica has received little interest. Crystal cored fibres, ccf's, in which there is a close match of the refractive index of the cladding to that of the core allows the possibility of fabricating single mode waveguides with useful dimensions for crystal growth. There is a better overlap integral between phase matched fundamental and second harmonic modes in a low moded structure than in a structure with more allowable modes and thus a rise in the conversion efficiency can be expected if the correct dimensions of waveguide are chosen. If a ccf of high conversion efficiency, 10% at 0.1 mW average power, could be made then the promise of fabricating an organic optical nonlinear device, e.g. parametric amplifier, might be realised. In this paper we will describe how the growth method adopted for silica clad organic crystals has been adapted for their growth in a range of Schott glasses which are better matched in refractive index, RI, than silica to the organic material. The linear and nonlinear optical properties of these crystal cored fibres will be given in terms of; the orientation of the crystal axes with respect to the fibre direction; the sideways scattering characteristics from defects; the throughput of the fundamental beam; the polarisation states of both the fundamental and the second harmonic outputs; and the overall efficiency of second harmonic generation.

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