Photonic crystals with carbon nanofibers
H. Arwin, R. Magnusson IFM, R. Renhammar CTH
Photonic crystals based on vertically aligned carbon nanofibers grown with plasma-CVD in quadratic, rectangular and random lattices were studied with ellipsometry and photonic band gaps were determined. These types of structures are optically complicated, with geometric effects both from the lattice and from individual scatterers.
Epitaxially grown MAX material for improved performance of FET sensors
Kristina Buchholt Anita Lloyd Spetz, IFM
MAX material contacts are developed for SiC FET sensors in order to improve the long term stable operation temperature of the devices to at least 700°C. The potential of magnetron sputtered,epitaxially grown Ti3SiC2(0001) as an ohmic contact material to 4H-SiC(0001) is investigated using transmission line model measurements (TLM). In-depth material characterization and study of the growth mode of Ti3SiC2 on 4H-SiC is performed using transmission electron microscopy (TEM), scanning electron microscopy (SEM), atomic force microscopy(AFM),elastic recoil detection analysis (ERDA) and helium ion microscopy (HIM).