Stephen L. Johnson

 

Contact information:

Stephen Johnson

University of Kentucky

Department of Physics & Astronomy

Chemistry-Physics Bldg., Rm 177

ph. 859.257.2511

email: stephen.johnson@uky.edu

 

I am a postdoctoral scholar in the University of Kentucky Department of Physics & Astronomy working with Professor Douglas Strachan.  My current research is in the area of nanoelectronics with a focus on graphene and Au nanoscale junctions.  I received my B.A. in physics from Transylvania University in 2004, and my Ph.D. from Vanderbilt University in 2008 under the supervision of Richard Haglund.  Previously, I worked in the field of laser ablation using a mid-IR free-electron laser (formerly) operating at Vanderbilt University.     

 

  1. •Johnson, S. L., Bubb, D. M., and Haglund, Jr., R. F. Phase explosion and recoil-induced ejection in resonant-infrared laser ablation of polystyrene. Applied Physics A 96, 627-635 (2009).

  2. •Johnson, S. L., Schriver, K. E., Bubb, D. M., and Haglund, Jr., R. F. Effects of the absorption coefficient on resonant-infrared laser ablation of poly(ethylene glycol). Journal of Applied Physics 105, 024901 (2009).

  3. •Haglund, Jr., R. F., Johnson, S. L., and Park, H. K. Electronic and optical properties of polymer thin-films deposited by resonant infrared laser ablation. Journal of Laser Micro/Nanoengineering 2(3), 234-240 (2007).

  4. •Johnson, S. L., Park, H. K., and Haglund, R. F., Jr. Properties of conductive polymer films deposited by infrared laser vaporization. Applied Surface Science 253, 6430-6434 (2007).

  5. •Bubb, D. M., Johnson, S. L., Belmont, R., Schriver, K. E., Haglund, R. F., Jr., Antonacci, C., and Yeung, L. S. Mode-specific effects in resonant infrared ablation and deposition of polystyrene. Applied Physics A 83(1), 147-151 (2006).


Recent Publications

Education

  1. •Ph.D., Vanderbilt University, 2008

  2. •M.S., Vanderbilt University, 2007

  3. •B.A., Transylvania University, 2004

Current Research Interests

Nanoscale and molecular electronics, nanoscale phenomena, graphene devices, scanning probe microscopy, laser interactions with materials, laser-materials processing, resonant vibrational excitation, pump-probe imaging and spectroscopy