Crystal structure, spectroscopic, thermal, mechanical, linear optical, second order and third order nonlinear optical properties of semiorganic crystal: l-threoninium phosphate (LTP)

Third order nonlinearity examined by pulsed and CW lasers: an organic urea barbituric acid (UBA) single crystal for optical limiting application with DFT study

“…Third order nonlinearity of the UBA crystal has been studied using both CW and pulsed lasers. (3) ] whereas 'β' (nonlinear absorption coefficient) is proportional to the third order imaginary part of susceptibility [Im χ (3) ] [64,65]. The third-order nonlinear susceptibility (χ (3) ) of UBA crystal was estimated by using Z-scan setup with 532 nm on the sample across the focal region and 103 mm is the focal length of the lens.…”

“…(3) ] whereas 'β' (nonlinear absorption coefficient) is proportional to the third order imaginary part of susceptibility [Im χ (3) ] [64,65]. The third-order nonlinear susceptibility (χ (3) ) of UBA crystal was estimated by using Z-scan setup with 532 nm on the sample across the focal region and 103 mm is the focal length of the lens. The sample was made to depart from negative Z position to the positive Z position (−Z to + Z) along the axial direction which is the direction of the propagation of the laser beam transmitted through the sample and is received through the photo detector.…”

“…Organic compounds have high delocalized conjugated system with strong electron donors (−NR, −OR, etc) and strong electron acceptors (-NO 2 , -CN, -COOH, -SO 3 H, etc) [2]. Organic crystals exhibit better third-order nonlinear optical (NLO) properties due to the presence of delocalized π-bonded electron system [3]. In view of industrial application and information technology, the NLO material plays a great impact on nonlinear optics.…”

“…Light passing through any NLO material gets altered which depends on its temperature, orientation and wavelength of the light etc [5][6][7]. The organic materials with inclusion of aromatic ring are highly suitable for χ (2) (second-order) and χ (3) (third-order) NLO applications since their high optical damage, higher nonlinearity and ultrafast or electronic response [8]. There is a huge ultimatum, for novel NLO materials with large NLO figures of merit that are widely used as they possess good stability, large laser damage threshold with low mechanical strength.…”

Crystal growth and characterization of Benzimidazolium salicylate single crystal for nonlinear optical studies and antibacterial activity

“…Nonlinear optical compounds are significantly used in numerous applications such as image processing, electro-optical switching devices, telecommunications, optical information processing and optical data storage [1][2][3][4]. The researchers are motivated to find an efficient NLO material due to the demand of NLO crystals which are used in various fields [5]. The organic compounds typically have strong coulombic interactions between electron donor and acceptor group in the structure which have significant NLO efficiency [6].…”