Laser modification of glass-ceramics structure and properties: a new view to traditional materials

Vadim P. Veiko; Q. K. Kieu; Nikolay V. Nikonorov

doi:10.1117/12.596294

8 October 2004 Laser modification of glass-ceramics structure and properties: a new view to traditional materials

Vadim P. Veiko, Q. K. Kieu, Nikolay V. Nikonorov

Proceedings Volume 5662, Fifth International Symposium on Laser Precision Microfabrication; (2004) https://doi.org/10.1117/12.596294
Event: Fifth International Symposium on Laser Precision Microfabrication, 2004, Nara, Japan

Abstract

Glass-ceramics (GCs) usually have glass structure doped with microcrystals that are responsible for main properties: mechanical, chemical, optical, etc. As for optical properties, GCs are non-optical materials due to a strong scattering in the visible range. By now different laser technologies for modification of structure of GCs structure have been developed. Heating of GCs with the use of a laser radiation transforms crystalline phase in to glassy. It results in a change of following physical and chemical properties of the irradiated area as density, volume, viscosity, hardness, transparency, refraction, etc. The most important thing is that optical transparency of GCs drastically increases in the visible and near IR range due to the appearance of a new glassy structure. Variation of laser treatment conditions (power, exposure, wavelength from IR to UV) as well as selection of composition of GCs allows to control mentioned characteristics. We have investigated two compositions of GCs with crystalline phases of TiO₂-SiO₂ (Sitall ST-50) and Li₂O-SiO₂ ("Fotoform"). The change of refractive index and surface relief has been used as the first step for fabrication of optical elements. The second stage was a chemical processing including an ion exchange technique (Li↔Na, K, Rb, for "Fotoform") and etching of irradiated and non-irradiated areas. Crystalline and glassy phases have different diffusion coefficient and rates of etching. It allows to modify the refractive index and the surface relief of optical elements. The other important feature is a difference in the macroscopic volumes of ordered-disordered phases which can be used to produce some surface reliefs etc. As a result of above mentioned rsearch mini- and micro-optical components based on two GCs have been fabricated and demonstrated: lenses and lens arrays, waveguides and other waveguiding components, diffractive gratings, integrated diaphragms etc.

Citation Download Citation

Vadim P. Veiko, Q. K. Kieu, and Nikolay V. Nikonorov "Laser modification of glass-ceramics structure and properties: a new view to traditional materials", Proc. SPIE 5662, Fifth International Symposium on Laser Precision Microfabrication, (8 October 2004); https://doi.org/10.1117/12.596294

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