With their research project entitled “Deposition of Nd:YAG on Silicon using Femtosecond Pulsed Laser Deposition with Oxygen Background Gas”, photonics members from the laser systems and applications cluster participated in the poster exhibit and competition during the National Research Council of the Philippines’ Annual General Membership Assembly held last March 11, 2015 at the Philippine International Convention Center, Pasay City.
Floyd Patricio manned the poster entry on behalf of his co-authors namely, Arriane Lacaba, Joseph De Mesa and Lean Dasallas. Their study, which deals with the fabrication of a laser crystal thin film that can be used for laser optoelectronics and telecommunication applications, was funded by DOST and UP-OVCRD.
Arriane Lacaba, Joseph De Mesa, Floyd Willis I. Patricio and Lean Dasallas
Nd:YAG were grown on silicon (100) using femtosecond pulsed laser deposition. The deposition was carried out in an oxygen background gas with pressures 2×10-2 and 6×10-2 mbar. Scanning electron microscopy and image analysis were used to determine the surface morphology and the particles size distribution of the deposited materials, respectively. SEM images showed that addition of oxygen in the deposition process decreased microcracks and increased substrate coverage area. The material deposited with high oxygen pressure revealed spheroidal and sharply edged particles. Plot distributions show that particle size range in the micron level and were independent of the oxygen background gas. It was also observed that particle size varies proportionally with oxygen pressure.