We investigate here the influence of pulse duration on high harmonic spectra in a wide band gap dielectric, MgO. Employing a Ti:S pulse compressed in a hollow core fiber, we can effectively tune the output pulse duration from 30 fs to 4.5 fs. By systematically varying both intensity and pulse duration, we explore macroscopic scaling laws governing harmonic generation in solids. We examine the cut-off energy, divergence, and emission wavelength. Notably, we show in the measured harmonics spectra differences in the highest energy reached, the shape of the harmonics and their center emitted energy. Pulse duration significantly impacts the emission process, thereby modulating the spectro-spatial characteristics of the generated harmonics, even at constant intensity levels.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.