Dennis R. Alexander

Kingery Professor of Electrical Engineering
Director, Center for Electro-Optics
248 WSEC, Box 880511
University of Nebraska-Lincoln
Lincoln, NE 68588-0511

(402) 472-3091 Voice 
(402) 472-5083 FAX 


Portrait of Dennis Alexander

Ph.D., Kansas State University, Manhattan, Kansas, 1976
M.Sc., Kansas State University, Manhattan, Kansas, 1973
B.Sc., Kansas State University, Manhattan, Kansas, 1971 


Professor Alexander joined UNL in 1975 as an Assistant Professor in the Mechanical Engineering Department. While spending 18 years in the Mechanical Engineering Department he was promoted to Associate Professor in 1979 and became Professor of Mechanical Engineering in 1986. He joined the Electrical Engineering Department in 1993 as a full Professor. He has developed extensive research and laboratory capabilities in femtosecond laser nanomachining, femtosecond material interactions, femtosecond optical communications, ultra-fast laser pulse propagation, femtosecond laser induced breakdown spectroscopy, aerosol sizing and performing electromagnetic calculations in linear and nonlinear laser interactions with aerosols.  He has received outstanding teaching awards and research awards. He has helped establish a student organization of the Optical Society of America and is the faculty advisor. 

Research Interests:
  • Femtosecond Laser Nanomachining
  • Nanostructures
  • Aerosols
  • Electromagnetic interactions and theoretical calculations
  • Femtosecond laser interactions with materials
  • Femtosecond laser pulse propagation in the atmosphere/remote sensing
  • Environmental monitoring/laser induced breakdown spectroscopy
  • Remote Sensing using infra-red cameras
Current Research Projects:
  • Femtosecond Laser Assisted Manufacturing of High Speed Quartz Oscillators (Army Research Office/EPSCoR)
  • Science and Engineering Research Center for Durable Miniaturized Systems (NSF)
  • Femtosecond Laser Machining of Kovar (Sandia National Laboratory)
  • Femtosecond Laser Machining of MEM Dies (Sandia National Laboratory/Photonics Solutions) 
  • Particle Detection and Surface Characterization by Using Femtosecond Laser Second Harmonic Generation (Advanced Micron Devices, Inc.)
  • Femtosecond Laser Processing of Returned Planetary Samples (NASA/Johnson Space Flight Center--Pending)
  • Remote Sensing of Buried Asbestos Using Thermal Imaging (Arcadis Geraghty & Miller--Pending)
  • Femtosecond Laser Nano-Machining of Quartz (CTS Corporation--Pending)
Selected Publications:
  • D.W. Doerr, B.W. Mihulka and D.R. Alexander, "Aluminum film ablation:  Comparison of resolution and quality using laser pulses from femtosecond to nanosecond duration," submitted to Journal of Applied Physics, 2001.
  • M.L. Rohlfs and D.R. Alexander, "Transient Plane Wave Scattering by a Dielectric Sphere," accepted by Journal of Optical Society of America, 2001.
  • V. Curicuta, D.R. Alexander, R.J. DeAngelis, S. Gaser, J.K. Krause and E. Kolawa, "Furnace and Laser Methods of Bonding Metals to Ceramics: Phenomenological Investigation," Materials Science & Engineering B, B68, 186-195, 2000.
  • V. Curicuta, D.R. Alexander, Y. Liu, and B.W. Robertson, "Bonding of Metals to Ceramics: Interface Investigation," Materials Science & Engineering, B68, 196-203, 2000.
  • D.W. Doerr and D.R. Alexander, "Sub-micron Patterning of Aluminum Films by Laser Ablation," SPIE, Micromachining and Microfabrication Process Technology V, Vol. 3874, Santa Clara, CA, September 20-22, 1999.
  • D.E. Poulain, D.R. Alexander, J.K. Krause, and A. Azizinamini, "Active Thermal Sensing of Corroded Rebar in Concrete," submitted to Journal of Infrastructure Systems, 1999.
  • D.E. Poulain, D.R. Alexander, S.A. Schaub and J.K. Krause, "Detection of Buried Objects Using Infrared Imaging of Laser Heated Soils," Optics and Lasers in Engineering, 31, 503-516, 1999
  • J.X. Ma, D.R. Alexander and D.E. Poulain, "Laser Spark Ignition and Combustion Characteristics of Methane-air Mixtures," Combustion and Flame, 112, 492-506, 1998.