Leon A. Taleh defended his PhD dissertation entitled “Effects of Sample Properties and Spatial Characteristics of the Laser Beam on Laser Induced Breakdown Spectroscopy Emission Lines” at 3 pm in Science Center room 238. Leon is advised by Dr. Noureddine Melikechi, the Director of OSCAR. In the 45-minute defense, Leon presented the historical background of Laser Induced Breakdown Spectroscop (LIBS), the significance and the originality of his work, the experiment design, the results and their implications with enthusiasm and clarity. The difficulties he had to overcome to prepare well-controlled binary and ternary sample mixes were impressive. Not only did he produce distinctive trends for different samples in LIBS experiments, he also went deeply in simulations to find matching theoretical support. Following the presentation, he provided satisfactory answers to the questions raised by the committee and from the audience who packed the room.
The dissertation committee convened after the defense and recommended for approval with minor revisions. Leon Taleh will become the first recepient of PhD degree in Applied Optics from OSCAR, a milestone for the Center. The high standards of academic scholarship Leon demonstrated at the dissertation defense has set up a good model for other students to follow.