Growth of high quality mercurous halide single crystals by physical vapor transport method for AOM and radiation detection applications

• Published in: Journal of crystal growth Vol. 450; pp. 96 - 102
• Main Authors: Amarasinghe, Priyanthi M., Kim, Joo-Soo, Chen, Henry, Trivedi, Sudhir, Qadri, Syed B., Soos, Jolanta, Diestler, Mark, Zhang, Dajie, Gupta, Neelam, Jensen, Janet L., Jensen, James
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.09.2016
• Subjects: A1. High resolution X-ray diffraction; A1. X-ray topography; A2. Growth from vapor; A2. Single crystal growth; B1. Halides; B2. Acousto-optic materials; B1. Halides; A1. High resolution X-ray diffraction; A1. X-ray topography; A2. Single crystal growth; A2. Growth from vapor; B2. Acousto-optic materials
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2016.06.025

Single crystals of mercurous halide were grown by physical vapor transport method (PVT). The orientation and the crystalline quality of the grown crystals were determined using high resolution x-ray diffraction (HRXRD) technique. The full width at half maximum (FWHM) of the grown mercurous bromide crystals was measured to be 0.13 degrees for (004) reflection, which is the best that has been achieved so far for PVT grown mercurous halide single crystals. The extended defects of the crystals were also analyzed using high resolution x-ray diffraction topography. Preliminary studies were carried out to evaluate the performance of the crystals on acousto-optic modulator (AOM) and gamma-ray detector applications. The results indicate the grown mercurous halide crystals are excellent materials for acousto-optic modulator device fabrication. The diffraction efficiencies of the fabricated AOM device with 1152 and 1523nm wavelength lasers polarizing parallel to the acoustic wave were found to be 35% and 28%, respectively. The results also indicate the grown crystals are a promising material for gamma-ray detector application with a very high energy resolution of 1.86% FWHM. •Single crystals of mercurous halide were grown by physical vapor transport method.•Crystals are 48mm in diameter, 70–80mm in height and 400–600g in weight.•FWHM of the XRD rocking curve was measured as 0.13°, the best reported to date.•Crystals were tested in acousto-optic modulator and radiation detector applications.