Specific mechanisms of bulk and surface absorption of ultrashort mid-infrared laser pulses in optical materials

Vitaly E. Gruzdev

doi:10.1117/12.2603324

19 October 2021 Specific mechanisms of bulk and surface absorption of ultrashort mid-infrared laser pulses in optical materials

Vitaly E. Gruzdev

Author Affiliations +

Proceedings Volume 11910, Laser-Induced Damage in Optical Materials 2021; 1191007 (2021) https://doi.org/10.1117/12.2603324
Event: SPIE Laser Damage, 2021, Online Only

Abstract

Low photon energy of mid-infrared radiation supports generation of non-equilibrium free-carrier plasma in transparent optical materials via nonlinear absorption and associated inter-band electron excitation. The collision rate of the plasma may be low so that the free carriers experience from zero to very few collisions per electron per pulse for pulses shorter than 200 fs. Those features of the free-carrier plasma support specific mechanisms of light absorption. We consider solid-state analogs of the Brunel absorption at interfaces, Landau damping, and nonlinear absorption by free-carrier stimulated inverse bremsstrahlung. Parametric scaling of those mechanisms is compared against that of the traditional models.

Conference Presentation

Citation Download Citation

Vitaly E. Gruzdev "Specific mechanisms of bulk and surface absorption of ultrashort mid-infrared laser pulses in optical materials", Proc. SPIE 11910, Laser-Induced Damage in Optical Materials 2021, 1191007 (19 October 2021); https://doi.org/10.1117/12.2603324

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