Crystal growth, thermal and optical studies on phase matchable new organic NLO material for blue-green laser generation

Growth and characterization of a nonlinear optical crystal: l-histidine trifluoroacetate

“…6. From the TGA curve, it can be recognized that the complex does not decompose before 200 1C, which has higher thermal stability than other L-histidine compound [32][33][34]. The melting point of the compound is about 213 1C, an endothermic peak is corresponding in the DTA curve and it reaches the maximum around 220 1C.…”

Structural, Thermal and Optical Studies of Oxypeucedanin Hydrate Monoacetate Micro-Crystals from <i>Prangos pabularia</i>

“…The higher energy electronic transition is promotion of an electron from a π bonding molecular orbital into a π * antibonding molecular orbital, known as π-π * transition (ligand π-π * transition). This means that only compounds with π electron and non-bonding electrons can produce UV-Vis spectra [15][16][17]. The observed less absorbance/ high transmittance in the entire visible region is due to π-π * transition of this molecule.…”

“…Materials with second-order optical nonlinearities, short transparency cut off wavelength, high thermal and mechanical properties are needed in order to realize most of these applications. The nonlinearity of the organic material is increased due to the delocalized π-electron system between donor and acceptor groups, which enhances their asymmetric polarizability [15][16][17]. In present paper, we report the structural, optical and thermal properties of oxypeucedanin hydrate monoacetate micro-crystals prepared by acetylation of oxypeucedanin hydrate, isolated from the ethyl acetate extract of the root parts of the plant Prangos pabularia.…”

Investigation on the crystal growth, molecular structure and nonlinear optical susceptibilities of 2-[2-(4-Ethoxy-phenyl)-vinyl]-1-ethyl-stilbazolium iodide (EESI) by Z-scan technique using He–Ne laser for third-order nonlinear optical applications

“…[62,63]. A material with low surface damage of the crystal by highpower lasers severely affects its performance in NLO applications, even though it has excellent transmittance properties [64]. Since it is an essential study to know its ability to withstand by high-intensity laser light.…”