Assessment of optical, mechanical and nonlinear properties of potassium acid phthalate single crystal: a potential candidate for optoelectronic applications

Abstract

A good optical quality semi-organic single crystal of Potassium Acid Phthalate (KAP) was harvested from aqueous solution by using slow evaporation solution growth technique (SEST) at ambient condition. The defect free single crystal of KAP was analyzed by different instrumentation techniques, for checking its compatibility for different applications. Its unit cell dimensions and phase purity was examined by powder X-ray diffraction (PXRD) and found that it crystallizes in orthorhombic with non-centrosymmetric in nature. The quality of the grown ingot was assessed by high resolution X-ray diffraction (HRXRD) technique and found that, the crystalline quality is better with less grain boundaries. Its optical properties were scrutinized by UV-vis., photoluminescence (PL) and time resolved photoluminescence (TRPL) measurements respectively. The mechanical stability of the grown crystal was tested by Vickers microhardness method and found that the grown crystal shows indentation size effect (ISE) which was explained using different theoretical models. Its third order nonlinear optical properties were studied by Z-scan measurement by using Ti:Sapphire laser as a source and determined its nonlinear absorption coefficient (β) and it was found that the KAP crystal is one of the preferable choices for optical limiting applications.

In situ growth of an ethyl p-hydroxybenzoate single crystal by the vertical Bridgman technique: a potential nonlinear optical material for third-harmonic generation

“…Optical transparency of a material and a wide optical band gap (E g ) in the visible spectrum are the two foremost parameters for laser applications (Kumari et al, 2020a;Bhat & Dharmaprakash, 2002). A cut and well polished single crystal of EPHB with a thickness t = 0.2 cm was subjected to UVvisible analysis to examine its optical behaviour.…”

Elemental, Optical, and Time-Domain Terahertz Spectroscopy Studies on Methyl p-Hydroxybenzoate Single Crystal for THz Applications

“…Nonlinear organic and semiorganic single crystals are widely used in different scientific and technological applications due to their efficacy in generating second-order harmonics for various lasers source. [1][2][3][4] Recent decades have shown that such single crystals are capable of producing second harmonics due to their non-centrosymmetric nature and are also potential candidates for the generation and detection of terahertz (THz) waves, 5 which are considered to represent a bridge between optical waves, i.e., infrared, and microwaves in the electromagnetic (EM) spectrum with frequencies generally in the range from 100 GHz to 10 THz. Radiation in the terahertz region is very useful for producing images in various fields such as medical, defense, and security.…”