Sequential and Mote Carlo Ray Tracing, RCWA (Rigorous Coupled-Wave Analysis), FEM (Finite-Element Methid), FDTD (Finite-difference time-doma), Fortran, Python, SQL.
Tools: UNIGIT, MC Grating, COMSOL Multiphysics, Lumerical, Zeemax, Matlab, Maple, Mathematica, MEDUSA (plasma thermodynamics modelling), FLYCHK (modelling of plasmas emission), AutoCAD, SolidWorks.