CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume PC12132 > Article
Presentation
3 June 2022 Laser dielectric interactions: new insight from double-pulse experiments
Stéphane Guizard
Author Affiliations +
Proceedings Volume PC12132, Advances in Ultrafast Condensed Phase Physics III; PC121320F (2022) https://doi.org/10.1117/12.2624512
Event: SPIE Photonics Europe, 2022, Strasbourg, France
Abstract
Our aim is to better understand and observe the many events occurring during the interaction of an intense and ultrashort pulse with a dielectric material. It is a challenging task, due to the competition between many different elementary physical mechanism, all occurring at sub-picosecond or femtosecond time scale: electron-phonon interaction, elastic and inelastic electron-electron scattering - including impact ionization, formation of transient or permanent defect states, exciton self-trapping, exciton-exciton interaction, etc. The direct observation of these processes is beyond the capacity of traditional time resolved femtosecond experiment due to a lack of temporal resolution. To encompass this intrinsic difficulty, we have carried out experiments with a double exciting pulse scheme. Under appropriate conditions, we can control independently the two key parameters: plasma density and temperature. Then, using time resolved interferometry as a probe, we could directly observe for the first time an electronic avalanche induced by a laser pulse in a solid, namely crystalline SiO2 [1]. A complete modeling, using multiple rate equation and taking into account the laser propagation, allows to fully describe the experimental results. In materials where exciton self-trapping does not occur, no evidence of electronic avalanche is found, and the lifetime of excited carrier is much longer [2]. Our investigations on a large set of different materials (NaCl, KBr, CaF2, etc) provide a strong indication that a link exists between two apparently opposite relaxation mechanisms, exciton self-trapping and laser induced impact ionization and avalanche.
Conference Presentation
© (2022) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Stéphane Guizard "Laser dielectric interactions: new insight from double-pulse experiments", Proc. SPIE PC12132, Advances in Ultrafast Condensed Phase Physics III, PC121320F (3 June 2022); https://doi.org/10.1117/12.2624512
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
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.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 PRESENTATION
WATCH
PRESENTATION SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
KEYWORDS
Dielectrics
Pulsed laser operation
Excitons
Femtosecond phenomena
Ionization
Solids
Scattering
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top