Spatio-temporal visualization and control of nonlinear propagation and phase matching for high-order harmonic generation.
Abstract
The PI proposes an experimental and theoretical research program to spatio-temporally visualize and control nonlinear propagation and phase matching for high-order harmonic generation (HHG). The proposed research program is composed of 4 thrusts. First, the PI will carry out HHG experiments in a gas jet as well as versatile, adjustable-length gas cells that enable laser filaments to form, and auxiliary control pulses to be injected. Second, the PI will study HHG in solids in anomalous dispersion using mid-infrared (mid-IR) and long-wavelength infrared (LWIR) femtosecond laser pulses. In particular, the PI will focus on HHG in bulk solids when a harmonic driver simultaneously undergoes laser filamentation, resulting in pulse compression down to single/sub-cycle durations and formation of a high-intensity optical solitary wave. Third, as diagnostic tools for the optical Kerr effect and plasma densities which can visualize nonlinearity and phase matching during laser filamentation and HHG, the PI will use sophisticated time-resolved methods such as transverse Gabor (in-line) holography (TGH) to measure in-situ micron-scale structure and fs-scale dynamics. Fourth, the PI will also benchmark these measurements against numerical simulations in nonlinear media using the carrier-resolved unidirectional pulse propagation equation (UPPE).
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 30, 2018
- Source ID
- FA95501810223
Entities
People
- Bonggu Shim
Organizations
- Air Force Office of Scientific Research
- Research Foundation for the State University of New York
- United States Air Force