Photo-ionization of superlattices on dielectric surface by IR radiation

V. E. Gruzdev

doi:10.1117/12.754056

18 December 2007 Photo-ionization of superlattices on dielectric surface by IR radiation

V. E. Gruzdev

Proceedings Volume 6720, Laser-Induced Damage in Optical Materials: 2007; 672004 (2007) https://doi.org/10.1117/12.754056
Event: Boulder Damage Symposium XXXIX: Annual Symposium on Optical Materials for High Power Lasers, 2007, Boulder, Colorado, United States

Abstract

In this paper we analyze the photo-excitation of electron sub-system of a periodic nano-structure by IR laser radiation. The nano-structure is a 1D super-lattice on surface of dielectric or semiconductor material transparent for the incident radiation. Theoretical description of the photo-excitation is based on the recent modification of the Keldysh theory adapted to the 1D case. We show that two specific regimes of the photo-excitation are possible in the super-lattices: photo-excitation suppression corresponding to decrease of the photo-excitation rate with increasing of laser intensity, and singularity regime corresponding to abrupt increase of the photo-ionization rate. Threshold of the singularity regime is calculated as function of laser wavelength and super-lattice period. The obtained results allow to propose a promising application of the super-lattices as intensity limiters for IR optical systems. In particular, we can calculate the period of the super-lattice to provide limiting of input laser intensity at required level due to multi-photon absorption by electrons of the lattice. Temperature of laser-induced heating resulted from total absorption of an incident laser pulse and diffraction distortions induced by the super-lattice are estimated to confirm possibility of utilizing the super-lattices as the intensity limiters.

Citation Download Citation

V. E. Gruzdev "Photo-ionization of superlattices on dielectric surface by IR radiation", Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 672004 (18 December 2007); https://doi.org/10.1117/12.754056

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Stereolithography

Superlattices

Absorption

Laser sintering

Dielectrics

Solids

Laser damage threshold

Show All Keywords

Keywords/Phrases

Search In:

Publication Years