Direction dependent crystalline perfection, Z-scan studies and fabrication of Type-I and Type-II SHG elements using imidazolium L-tartrate crystals for optical modulator applications. (January 2023)

• Record Type: Journal Article
• Authors: Sidden, Chinnasami; Paulraj, Rajesh; Bhatt, Rajeev; Bhaumik, Indranil; Soharab, Mohammad; Perumalsamy, Ramasamy
• Is Part Of: Journal of physics and chemistry of solids. Volume 172(2023)
• Publication Date: 2023-01
• Subjects: Refractive index -- Phase matching angle -- HRXRD -- SHG -- Polarized Raman spectroscopy; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2022.111065
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: Monoclinic phase (P21 ) imidazolium l -tartrate (IMLT) has received considerable research interest because of its wide transparency range, good SHG efficiency and phase matchable non-linear optical (NLO) materials. Organic single crystals of IMLT have been grown via a slow cooling method. The grown crystals were oriented using powder X-ray diffraction. The quality of the grown crystals was evaluated using HRXRD studies. Polarized Raman spectroscopy was carried out on b-cut and c-cut IMLT wafers. The third order NLO characteristics of the <1 0 0>, <0 1 0> and <0 0 1> orientated IMLT crystals have been studied using Z-scan measurements with a Hi-Ne laser (632.8 nm). The second-harmonic generation (SHG) intensity was measured for the powdered grown crystals with various particle sizes to explore the second order NLO properties and phase matchability in the crystals. Furthermore, the type-I and type-II phase-matching angle of the XY and XZ (θ <Ω) planes were calculated. Highlights: The IMLT crystal (100), (010) and (001) planes were oriented using powder X-ray diffraction pattern. Temperature dependent phase matching angles along XY and XZ planes of the grown crystal were calculated. Particle size dependent SHG studies confirmed that IMLT crystal is phase matchable NLO material. The effect of direction dependent crystalline perfection and z-scan studies were discussed.