Laser-induced bleaching of insulators under MeV heavy-ion implantation

Naoki Kishimoto; Nariaki Okubo; Naoki Umeda; Yoshihiko Takeda

doi:10.1117/12.459729

18 March 2002 Laser-induced bleaching of insulators under MeV heavy-ion implantation

Naoki Kishimoto, Nariaki Okubo, Naoki Umeda, Yoshihiko Takeda

Proceedings Volume 4636, Nanoscience Using Laser-Solid Interactions; (2002) https://doi.org/10.1117/12.459729
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

High-energy ion implantation is one of the unique methods to fabricate nano-scale structures, taking advantage of the spatial controllability and the non-equilibrium atomic injection. Metal-ion implantation into a transparent insulator creates a metal nanoparticle composite, which is promising as a nonlinear optical material with ultrafast response. Radiation damage of substrates and/or nanoparticles, which is inherent in ion implantation, is a drawback for optical performance of the nanoparticle composites. It is desired to annihilate radiation damage without melting the matrix. We have applied laser irradiation of sub-gap energy during heavy-ion implantation. Copper ions of 3 MeV and laser of a sub-gap energy (2.3 eV) irradiated insulators of a-SiO₂ and spinel MgO•2.4(Al₂O₃). The dose rate varied up to 10 (mu) A/cm² for Cu ions of 3 MeV and up to 0.2 J/cm²•pulse at 10 Hz for YAG-SHG laser. Only when ions and photons were simultaneously irradiated at the higher photon intensity (> 0.1 J/cm²•pulse), the insulators were effectively bleached in the optical absorption spectra. As well as the bleaching, precipitation enhancement and atomic desorption took place. The results indicate importance of dynamical electronic excitation during ion irradiation and that the photon irradiation enhances atomic displacements either at the surface or in the bulk.

Citation Download Citation

Naoki Kishimoto, Nariaki Okubo, Naoki Umeda, and Yoshihiko Takeda "Laser-induced bleaching of insulators under MeV heavy-ion implantation", Proc. SPIE 4636, Nanoscience Using Laser-Solid Interactions, (18 March 2002); https://doi.org/10.1117/12.459729

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