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.

Modification in Hygroscopic Nature of Urea via Formation of Solid Solution, and its Particle Size and Second Harmonic Generation Study

2012 ◽  
Vol 584 ◽  
pp. 107-111
Author(s):  
Rajasekhar Bhimireddi ◽  
Ramanand Rai
Keyword(s):  
Solid Solution ◽  
Particle Size ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Vapor Sorption ◽  
X Ray Diffraction ◽  
Second Harmonic Generation Efficiency ◽  
X Ray ◽  
Hygroscopic Nature

Solid solution of m-dinitrobenzene (DNB) and 4-bromo-2-nitro aniline (BNA) in urea (U) were prepared based on the prior study of phase diagram. The formation of solid solution was studied using the powder X-ray diffraction techniques. The powder X-ray data were also used for the study of particle size and strain in solid solution. The vapor sorption and desorption studies revealed that the hygroscopic character of urea was modified in solid solution. The study for the second harmonic generation efficiency of urea, DNB, BNA and the solid solution was done with fundamental of Nd:YAG laser (1064 nm).

Local structure of the B4 phase studied by second harmonic generation and X-ray diffraction measurements

2009 ◽  
Vol 19 (29) ◽  
pp. 5161 ◽  
Author(s):  
Josu Martínez-Perdiguero ◽  
Ibon Alonso ◽  
César L. Folcia ◽  
Jesús Etxebarria ◽  
Josu Ortega
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Local Structure ◽  
Second Harmonic ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Growth, structural and optical properties of novel nonlinear optical potassium phthalate di lithium borate (KPDLiB) single crystals

2020 ◽  
Vol 38 (2) ◽  
pp. 214-218
Author(s):  
K. Mohanraj ◽  
D. Balasubramanian ◽  
N. Jhansi
Keyword(s):  
Single Crystals ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Visible Region ◽  
Fluorescence Emission ◽  
Lithium Borate ◽  
X Ray Diffraction ◽  
Second Harmonic Generation Efficiency ◽  
X Ray ◽  
Evaporation Technique

AbstractNovel nonlinear optical semi-organic, potassium phthalate di lithium borate (KPDLiB) single crystals were successfully grown by the slow solvent evaporation technique. Good crystalline nature and an orthorhombic structure were confirmed by powder X-ray diffraction and single crystal X-ray diffraction studies. The functional groups of KPDLiB were identified using FT-IR spectrum recorded in the range of 4000 cm−1 to 450 cm−1. UV-Vis spectrum showed transmitting ability of the crystals in the entire visible region. The photoluminescence spectrum exhibited good fluorescence emission in a visible region at 384 nm, 416 nm and 578 nm. The second harmonic generation efficiency of the grown crystal was evaluated from Kurtz powder technique.

Unidirectional growth and characterization of L-tartaric acid single crystals

2013 ◽  
Vol 46 (4) ◽  
pp. 993-998 ◽  
Author(s):  
K. Moovendaran ◽  
S. Natarajan
Keyword(s):  
Single Crystals ◽  
Tartaric Acid ◽  
Second Harmonic ◽  
Nir Spectroscopy ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Solution Technique ◽  
X Ray Diffraction ◽  
Second Harmonic Generation Efficiency ◽  
X Ray

Single crystals of L-tartaric acid (LTA), an organic nonlinear optical material, have been grown using a home-built crystal growth setup (the Moovendaran–Kalyanasundar–Natarajan setup). Crystals of LTA were also grown by the slow evaporation solution technique. These single crystals were characterized using single-crystal X-ray diffraction, high-resolution X-ray diffraction, and IR and UV–Vis–NIR spectroscopy. In addition, measurements of Vickers microhardness, laser damage threshold value and second harmonic generation efficiency are reported. Thermal, dielectric and photoluminescence studies were also carried out.

Synthesis, crystal structure, and magnetic properties of a multicage compound: [(Me)2EtNH][Mn(N3)3] with a perovskite-related structure

2019 ◽  
Vol 74 (4) ◽  
pp. 335-339 ◽  
Author(s):  
Jie Yang ◽  
Yuan Huang ◽  
Ting Fang ◽  
Kun Qian ◽  
Wen-Bin Chen ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Magnetic Measurements ◽  
Second Harmonic ◽  
Three Dimensional ◽  
Related Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polar Crystal

AbstractA new multicage compound [(Me)2EtNH][Mn(N3)3] (Me = methyl, Et = ethyl) with a perovskite-related structure has been synthesized. The manganese(II) cations are bridged by end-to-end (EE) azide anions to form three-dimensional cages with the N,N-dimethylethylammonium cations residing in the cavities of the [Mn(N3)3]nn− cages. The compound has been characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, second-harmonic generation, and magnetic measurements. The second-harmonic generation results support its noncentrosymmetric polar crystal structure. Magnetic susceptibility measurements show antiferromagnetic interactions among the MnII ions.

Nano-Crystallized Glass Fibers with Second-Order Optical Nonlinearity

2006 ◽  
Vol 11-12 ◽  
pp. 209-212 ◽  
Author(s):  
N. Iwafuchi ◽  
S. Mizuno ◽  
Yasuhiko Benino ◽  
Takumi Fujiwara ◽  
Takayuki Komatsu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Second Harmonic Generation ◽  
Optical Fibers ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Glass Fibers ◽  
Optical Nonlinearity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nano Size

Transparent nano-crystallized glass fibers with 300μm diameter were successfully fabricated in tellurite (TeO2) based glass systems. Structure of crystallized glass fibers and orientation of nano-size crystals were quantitatively investigated by microscopic Raman spectroscopy and X-ray diffraction. Second harmonic generation was measured in the nano-crystallized optical fibers.

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