Over the last fifty years, Prof. Asmussen has been pioneering the development of: (1) the fundamental knowledge and (2) the application of microwave discharges (MD). His activities have led to the discovery of how to efficiently couple to and control the MD phenomena over a large range of pressures and input power levels. He has applied this knowledge to new MD applications resulting in numerous inventions and microwave plasma devices or plasma machines. Among these are microwave: (1) ion and plasma sources and ion engines, (2) free radical sources, (3) electro-thermal thrusters and (4) plasma CVD diamond deposition machines. His current research interests are aligned to further develop these applications and to transfer these technologies into commercial products. For example, during the past twenty-five years he and his students have investigated the microwave plasma assisted deposition of polycrystalline and single crystalline diamonds. They have developed and patented microwave plasma processing machines and associated process methods that are currently in use in research labs and by private industries around the world.
Technology Transfer Achievement Award by MSU Innovations (2016)
The Richard M. Hong Chaired Professor (2002)
Withrow Distinguished Scholar Award, Michigan State University (1997)
University Distinguished Professor of Electrical Engineering, Michigan State University (1997)
Distinguished Service Award, University of Wisconsin-Madison, College of Engineering (1993)
Fellow, Institute of Electrical and Electronics Engineers (1992)
Distinguished Faculty Award, Michigan State University (1988)
Ph.D. University of Wisconsin, 1967
M.S. University of Wisconsin, 1964
B.S. University of Wisconsin, 1960
S. Nad and J. Asmussen, “Analyses of High Quality Single Crystal Diamond Substrates” accepted by Diamond and Related Materials, (2016).
S. Nad, Y. Gu and J. Asmussen, “Growth Strategies and Characterization of High Quality Single Crystal Diamond Substrates.” Diamond and Related Materials, 60, 26-34, 2015.
S. Nad, J. Lu and J. Asmussen, “Determining the Microwave Coupling and Operational Efficiencies of a Microwave Plasma Assisted Chemical Vapor Deposition Reactor under High Pressure Diamond Synthesis Operating Conditions”, Review of Scientific Instruments, 86, 074701, doi: 10, 1062/1.4923092, 2015.
M. Schreck, J. Asmussen, S. Shikata, J. Arnault, and N. Fujimori, “Large-area high-quality single crystal diamond:”, Invited Paper, MRS Bulletin, 39, 504-510, June 2014.
M. Muehle, M. F. Becker, T. Schuelke, and J. Asmussen, “Substrate crystal recovery for homoepitaxial diamond synthesis”, Diamond and Related Materials, 42, 8-14, 2014.
J. Lu, Y. Gu, T. A. Grotjohn, T. Schuelke, and J. Asmussen, “Experimentally defining the safe and efficient high pressure microwave plasma assisted CVD operating regime for single crystal diamond synthesis,” Diamond and Related Materials, 37, 17-28. 2013.
Y. Gu, J. Lu, T. Grotjohn, T. Schuelke, and J. Asmussen, “Microwave plasma reactor design for high pressure and high power density diamond synthesis”, Diamond and Related Materials, 24, 210-214, 2012.
D. K. Reinhard, D. T. Tran, T. Schuelke, M. Becker, T. A. Grotjohn, and J. Asmussen, “SiO2 antireflection layers for single-crystal diamond,” Diamond and related Materials,25, 84-86, 2012.
X. Rao, S. Hammack, C. Carter, T. Grotjohn, J. Asmussen, and T. Lee, “Microwave Plasma- Coupled Re-ignition of Methane- and Oxygen- Mixtures under Auto-ignition Temperature”, IEEE Trans on Plasma Science, 39, 3307-3313, 2011.
K.W. Hemawan, T. A. Grotjohn, D. K. Reinhard, and J. Asmussen, “Improved microwave plasma cavity reactor for diamond synthesis at high pressure and high power density”, Diamond and Related Materials 19, 1446-1452, 2010.
X. Rao, K. W. Hemawan, C. Carter, I. Wichman, T. Grotjohn, J. Asmussen, and T. Lee, “Combustion dynamics for energetically enhanced flames using direct microwave energy coupling”, Proc. Combust. Inst., 33, 3232-3240, 2011.