J. Ullmann

Application of the Tauc-Lorentz formulation to the interband absorption of optical coating materials

Bernhard von Blanckenhagen, D. Tonova, J. Ullmann · Applied Optics · 2002 · 128 citations

Optical Materials, Engineering, Optical Coating Materials +16

Structural changes in diamond and amorphous carbon induced by low-energy ion irradiation

Petra Reinke, G. Francz, P. Oelhafen et al. · Physical review. B, Condensed matter · 1996 · 58 citations

Materials Science, Diamond-like Carbon, Amorphous Carbon +15

Reduction of intrinsic stress in cubic boron nitride films

J. Ullmann, A. J. Kellock, J. E. E. Baglin · Thin Solid Films · 1999 · 45 citations

Materials Engineering, Materials Science, Boron Nitride +6

Effects of MeV ion irradiation of thin cubic boron nitride films

J. Ullmann, J. E. E. Baglin, A. J. Kellock · Journal of Applied Physics · 1998 · 38 citations

Materials Science, Ion Implantation, Boron Nitride +10

Low energy ion assisted carbon film growth: methods and mechanisms

J. Ullmann · Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms · 1997 · 18 citations

Materials Science, Carbonization, Low-carbon Technology +6