Ionization clamping in ultrafast optical breakdown of transparent solids

Pavel Polynkin; Anton Rudenko; Jerome V. Moloney

doi:10.1117/12.3025246

11 April 2024 Ionization clamping in ultrafast optical breakdown of transparent solids

Pavel Polynkin, Anton Rudenko, Jerome V. Moloney

Proceedings Volume PC12939, High-Power Laser Ablation VIII; PC129391C (2024) https://doi.org/10.1117/12.3025246
Event: SPIE High-Power Laser Ablation, 2024, Santa Fe, New Mexico, United States

Abstract

By the application of a multi-physics model describing the nonlinear propagation of a femtosecond, near-infrared laser pulse in bulk sapphire, we show that even under extreme focusing conditions, the ionization is rigidly clamped at about one tenths of the electron density in the upper valence band. The earlier estimates of approximately 10 TPa pressure that could be attainable through the internal excitation of transparent dielectrics by tightly focused ultrafast laser beams is shown to be off by two orders of magnitude. We discuss potential routes towards overcoming the clamping limit and present experimental results on the generation of internal voids in bulk sapphire by ultrafast, simultaneously spatially and temporally focused (SSTF) laser beams.

Conference Presentation

Citation Download Citation

Pavel Polynkin, Anton Rudenko, and Jerome V. Moloney "Ionization clamping in ultrafast optical breakdown of transparent solids", Proc. SPIE PC12939, High-Power Laser Ablation VIII, PC129391C (11 April 2024); https://doi.org/10.1117/12.3025246

ACCESS THE FULL ARTICLE

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