Laser and Optics Laboratory

Objective

The objective of this laboratory is to elucidate the physics of laser-material interactions for laser-induced process and we aim to develop novel laser-based analytical technique for ultra-trace analysis.

Facilities

The centralized facilities of our laboratory include Nd:YAG laser, excimer gas laser, spectrograph, intensified charge coupled device, electronic measuring instruments, optical positioning devices and assorted optics.

Photos of core equipment are below,

Smart table
Nd:YAG laser
Excimer laser
Spectrograph
Intensified charge coupled device
Digital delay generator
Fast Oscilloscope

Recent Projects

Multi-element analysis of solid sample by laser-induced breakdown spectroscopy
Simultaneous multi-element analyses for aluminum and stainless steel alloys using laser-induced breakdown spectroscopy (LIBS) were performed with special emphasis on the destructiveness of target. LIBS was demonstrated to be a practical sensing technique for minimally destructive analysis of sample with numerous elements.

Analysis of Impurity Effects on Coloration of Corundum by Laser-induced Breakdown Spectroscopy
Corundum have been analyzed by LIBS for impurity effects in their multiple colorings. Qualitative measurements have been attained for impurities of chromium, magnesium, iron and titanium in red, yellow and blue samples. Moreover, the treatment of beryllium diffusion, that can modify corundum to attractive color, was testified in the yellow sample.

Laser-excited Atomic Fluorescence of Desorbed Plumes for Elemental Analysis of Interfaces for Luminescent Material Applications
The specific objective of this project is to apply the plume Laser-excited Atomic Fluorescence technique to chemically profile the organic/inorganic interfaces in order to elucidate their effect on the performance of organic photovoltaic devices.

Trace Elements Analysis for Plant Materials using Laser-excited Atomic Fluorescence of Desorbed Plumes
The objective of this project is to apply plume Laser-excited Atomic Fluorescence to analyze mineral and toxic elements in fruits or vegetables to reveal essential information in foodstuff. In addition, pollutants in soil, water and air can be observed indirectly because they are in immediate contact with the plants.

Courses supported