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Synthesis, growth and characterization of semiorganic nonlinear optical single crystal bis(thiourea) barium nitrate (BTBN) for frequency conversion

Anbarasi A., Kumar S.M. Ravi, Raj M. Packiya, Sundar G.J. Shanmuga, Ganapathy M., Kubendiran T., Varalakshmi S.

Materials Science Poland

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2019

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Vol. 37, No. 3

381--388

EN

A novel semiorganic nonlinear optical (NLO) crystal, bis(thiourea) barium nitrate (BTBN) was synthesized and grown by slow evaporation method. Structure of the new crystalline compound was confirmed by single crystal X-ray diffraction analysis and it showed that BTBN belongs to orthorhombic crystal system. The crystalline nature of the BTBN was confirmed by powder X-ray diffraction study. Important functional groups of BTBN were identified by FT-IR spectroscopic analysis. UV-Vis-NIR spectral study showed that the grown crystal is transparent in the entire visible region with low cut off wavelength of 304 nm. BTBN exhibits a SHG efficiency which is nearly 2.38 times higher than that of KDP. The BTBN crystal has high mechanical strength and belongs to soft category, which was confirmed by micorhardness study. The thermal stability of BTBN was determined from TGA and DTA thermal study which revealed that the BTBN crystal has thermal stability up to 243.1 °C. The surface properties and presence of elements was analyzed by SEM and EDAX study, respectively.

2

Studies on the growth and characterization of L-cysteine hydrogen fluoride single crystal

Mohammed Azeezaa Varsha, Sagadevan Suresh

Materials Science Poland

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2019

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Vol. 37, No. 3

304--309

EN

L-cysteine hydrogen fluoride (LCHF) single crystals were grown from aqueous solution. Single crystal X-ray diffraction, FT-IR, UV-Vis-NIR, and TG-DTA were used to test the grown crystals. The specimen dielectric and mechanical behaviors were also studied. Powder X-ray diffraction of the grown crystal was recorded and indexed. The optical properties of the LCHF crystal were determined using UV-Vis spectroscopy. It was found that the optical band gap of LCHF was 4.8 eV. The crystal functional groups were identified using FT-IR. Second harmonic generation (SHG) efficiency of the LCHF was three times higher than that of KDP. The dielectric constant, dielectric loss and AC conductivity were measured at different frequencies and temperatures.

3

Structural, optical, thermal, dielectric and mechanical studies of a new organic NLO material: L-isoleucinium p-toluenesulfonate monohydrate (LIPT)

Suresh M., Asath Bahadur S., Athimoolam S.

Materials Science Poland

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2019

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Vol. 37, No. 2

196--205

EN

In the present work, a new organic second order NLO material: L-isoleucinium p-toluenesulfonate monohydrate (LIPT) is synthesized and reported for the first time. The LIPT is crystallized in a non-centrosymmetric monoclinic space group P21. Structural and hydrogen bond nature of the compound is analyzed using single crystal X-ray diffraction studies. The crystal exhibits very good optical properties such as wide optical transparency in the region of 210 nm to 1100 nm and the ultraviolet wavelength emission (λ = 283 nm). The second harmonic generation efficiency is found to be 1.7 times the standard KDP. Good thermal, mechanical properties and low dielectric constant at high frequency range show that the material may be a potential candidate for optoelectronic applications.

4

Investigation on nonlinear optical and dielectric properties of L-arginine doped ZTC crystal to explore photonic device applications

Anis M., Hussaini S. S., Shirsat M. D., Muley G. G.

Materials Science Poland

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2016

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Vol. 34, No. 3

548--554

EN

The present study is focused to explore the photonic device applications of L-arginine doped ZTC (LA-ZTC) crystals using nonlinear optical (NLO) and dielectric studies. The LA-ZTC crystals have been grown by slow evaporation solution technique. The chemical composition and surface of LA-ZTC crystal have been analyzed by means of energy dispersive spectroscopy (EDS) and surface scanning electron microscopy (SEM) techniques. The Vicker’s microhardness study has been carried out to determine the hardness, work hardening index, yield strength and elastic stiffness of LA-ZTC crystal. The enhanced SHG efficiency of LA-ZTC crystal has been ascertained using the Kurtz-Perry powder SHG test. The closed-and-open aperture Z-scan technique has been employed to confirm the third order nonlinear optical nature of LA-ZTC crystal. The Z-scan transmittance data has been utilized to calculate the superior cubic susceptibility, nonlinear refractive index, nonlinear absorption coefficient and figure of merit of LA-ZTC crystal. The behavior of dielectric constant and dielectric loss of LA-ZTC crystal at different temperatures has been investigated using the dielectric analysis.

5

Growth and characterization of NLO crystal: L-leucine phthalic acid potassium iodide

Jagadeesh M. R., Kumar H. M. S., Kumari R. A.

Materials Science Poland

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2015

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Vol. 33, No. 3

529--536

EN

A new semi-organic non linear optical crystal, L-leucine phthalic acid potassium iodide (LLPPI) has been grown from an aqueous solution by slow evaporation method. The grown crystals were subjected to different characterizations, such as single crystal XRD, FT-IR, UV-Vis, TGA, SEM, EDAX, micro hardness, dielectric and powder SHG. Single crystal structure was determined from X-ray diffraction data and it revealed that the crystal belongs to triclinic system with the space group P1. The vibrational frequencies of various functional groups were derived from FT-IR spectrum. Thermal stability of the grown crystal was investigated by TG-DTA studies and it was observed that the crystal was thermally stable up to 192 °C. Optical absorption study was carried out and a good transparency in the entire visible region was observed at the lower cutoff wavelength of 227 nm. Dielectric study was performed as a function of frequency and normal dielectric behavior was observed. The micro hardness test was carried out and the load dependent hardness was measured. Kurtz powder method was employed to explore the NLO characteristics of the grown crystal.

6

Ambipolar injection into pentacene field effect transistor observed by time-resolved optical second harmonic generation imaging

Manaka T., Nakao M., Lim E., Iwamoto M.

Materials Science Poland

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2009

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Vol. 27, No. 3

709--717

EN

Ambipolar carrier injection from gold electrode into pentacene was investigated by time-resolved optical second harmonic generation (TRM-SHG) imaging. Smooth hole injection is verified by rapid decrease of the SHG intensity at the electrode edge, indicating the absence of an injection barrier. In contrast, TRM-SHG results clearly indicated the presence of electron injection from the high-work function metal into the electrode, though after injection electrons were trapped in the channel and could not contribute to the conduction. Transient electric field distribution due to the injected holes and electrons were evaluated based on the SHG intensity distribution.

7

Structural Properties of Organometallic Thin Films Oriented by Corona Poling

Śniechowski M., Nizioł J., Łużny W.

Fibres & Textiles in Eastern Europe

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2008

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Vol. 16, no. 6 (71)

89--92

EN

In this article, we review some results of structural studies of a novel series of donor–acceptor bis-alkynyl ruthenium chromophores in the form of thin films. At first, these thin films were oriented by a corona poling technique and were optically characterized using(Second and Third Harmonic Generation, respectively (SHG and THG). Next, the X-ray diffraction (XRD) technique was used to correlate the Nonlinear Optics (NLO) properties and directly observe the structural ordering of the studied materials. The last paragraph presents recent supramolecular modelling studies using molecular dynamics simulations. The used of organometallic films in textronic systems may be of the highest importance in order to achieve the possibility of creation micro-electro-optical sensors and circuits incorporated in textiles.

PL

Przedstawiono wyniki badań strukturalnych nowych cienkowarstwowych chromoforów zawierających ruten. Warstwy te były wstępnie orientowane techniką wyładowania koronowego, a następnie charakteryzowane optycznie (zdolności do generowania drugiej i trzeciej harmonicznej). Wyniki badań metodą dyfrakcji rentgenowskiej są w pełni skorelowane z nieliniowymi właściwościami optycznymi i pozwalają bezpośrednio obserwować uporządkowanie badanych materiałów. Przedstawia on najnowsze wyniki modelowania uporządkowania supramolekularnego otrzymane metodą dynamiki molekularnej.