Maximizing energy deposition by shaping few-cycle laser pulses
arXiv:1806.08994 · doi:10.1088/1361-6455/aac783
Abstract
We experimentally investigate the impact of pulse shape on the dynamics of laser-generated plasma in rare gases. Fast-rising triangular pulses with a slower decay lead to early ionization of the air and depose energy more efficiently than their temporally reversed counterparts. As a result, in both argon and krypton, the induced shockwave as well as the plasma luminescence are stronger. This is due to an earlier availability of free electrons to undergo inverse Bremsstrahlung on the pulse trailing edge. Our results illustrate the ability of adequately tailored pulse shapes to optimize the energy deposition in gas plasmas.
arXiv comment11 pages, 6 figures
References in corpus (5)
- Ultrashort filaments of light in weakly-ionized, optically-transparent media
- Quantum Control of Molecular Gas Hydrodynamics
- Energy deposition from focused terawatt laser pulses in air undergoing multifilamentation
- High repetition rate ultrashort laser cuts a path through fog
- Optimal laser pulse energy partitioning for air ionization