Fundamentals of Femtosecond Laser Induced Damage of Solids: Advancement Through Experimental, Computational and Theoretical Development
Abstract
The objective is to develop a comprehensive, fundamental understanding of intense field laser damage in the femtosecond regime by combining experimental, theoretical and computational efforts that will inform and be benchmarked against one another. The proposed research plan will improve our existing understanding of hot electron generation, evolution and subsequent damage formation by addressing the following five issues: (1) explore the electron dynamics that determines the laser induced damage threshold (LIDT) of solids and its dependence on laser and material parameters, (2) study how the strong optical field of an ultra short laser pulse modifies the band structure of crystals to affect ionization and LIDT, (3) measure the range of ballistic (non-thermal) electrons inside material and how they affect damage morphology, (4) explore how basic mechanisms of laser induced damage change under intense few cycle pulses and (5) understand the origin, mechanism and time scale of high spatial frequency laser induced periodic surface structures (HSFL) formation, particularly HSFLs that form parallel to laser polarization direction.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 23, 2016
- Source ID
- FA95501610069
Entities
People
- Enam Chowdhury
Organizations
- Air Force Office of Scientific Research
- Ohio State University
- United States Air Force