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Barry small web.jpg


Univ of Delaware


Physics & Astronomy


264 Sharp Lab


Newark, DE 19716



. 24hr best way to communicate


cell/txt 302-740-0257 M-F 9:30am to 7:00pm


office: 302-831-2673


lab: 302-831-6542


lab office: 302-831-6663

Barry tree 2008 web.jpg

My expertise is the experimental study of light matter interactions and ultrafast opto-electronic technology. I have studied atoms and molecules in perturbative "multiphoton" and nonperturbative "strong" optical fields. Most recently, my interest is in probing the physics of atoms in "ultra" high intensity laser fields; light whose intensity is billions and billions of times more intense than sunlight on the earth. Such interactions compare to the most violent astrophysical events. New and exciting excitation processes occur in these high fields where v/c and B are not approximately zero and our common understandings are tenuous.

Developments in laser technology are greatly responsible for the newest insights into light-matter interactions. Within the past five years, this has involved advances in the control of the spatial and temporal characteristics of light.

Recent Academic and Professional Positions


  • Professor
  • Physics & Astronomy, University of Delaware

2008- 2009

  • Associate Chair
  • Physics & Astronomy, University of Delaware


  • Visiting Fellow
  • JILA, University of Colorado

2002- 2004

  • Director of Undergraduate Program
  • Physics & Astronomy, University of Delaware

Education and Mentors

    • Post-Doctorate Research Assistant -Prof. Kent R. Wilson & Dr. Chris Barty Dept Chemistry & Biochemistry, Univ. California San Diego
    • Ph.D. Physics, State University of New York at Stony Brook, Stony Brook, New York
    • Graduate Research Advisor -Dr. Louis F. DiMauro Dept Chemistry, Brookhaven National Lab, Upton, NY
    • B.A. Chemistry and B.A. Physics, Point Loma Nazarene University, San Diego, California Magna Cum Laude, Phi Delta Lambda Honor Society


  • Elected as a Fellow of the American Physical Society. Citation: For investigations of multiple ionization in the non-relativistic and relativistic regimes that have contributed to the understanding of intense laser-atom interactions.