Foto-indukované jevy ve skle systému PbO-Ga\dindex{2}O\dindex{3}

Bc. Jan Smolík

Master's thesis

Photo-induced effects in the glassy PbO-Ga\dindex{2}O\dindex{3}

Abstract:

Tato diplomova prace je zam..ena na studium fotoindukovanych jev., p.edev.im tvorbu mikro-.o.ek, na povrchu objemovych vzork. skel systemu PbO-Ga2O3 o slo.eni 69,8PbO-30,2Ga2O3; 74,7PbO-25,3Ga2O3 a 79,1PbO-20,9Ga2O3. P.ipravena skla byla exponovana laserem s ?É = 447 nm o pr.m.ru 5 mm a material reagoval reverzibilnim fototmavnutim (.E03 = 25 meV). V p.ipad. expozice fokusovanym paprskem o pr.m.ru 200 ?Ęm s intenzitou a. 1600 W/cm2 vznikaly na povrchu r.zne utvary jako kratery, krystalicka faze a mikro-.o.ky.

Abstract:

The diploma thesis is focused on the study of photo-induced effects, especially micro-lens formation by the photo-thermal expansion of the material, on the surface of bulk glass of the system PbO-Ga2O3 with the chemical composition 69.8PbO-30.2Ga2O3; 74.7PbO-25.3Ga2O3 a 79.1PbO-20.9Ga2O3. The prepared glasses were illuminated by laser emitting at the wavelength ë = 447 nm and the beam diameter 5 mm. The illumination induced reversible photo-darkening (ÄE03 = 25 meV) in the material. In the case of the high-intensity exposition by the laser beam (ë = 447 nm) focused to the diameter about 200 ěm with the maximal intensity 1600 W/cm2, the different photo-induced phenomena were observed as craters, crystalline phase or micro-lenses formation.

Keywords

fotoindukované jevy, mikro-čočky, interakce laseru s materiálem, skla PbO-Ga2O3

Language used: Czech

Date on which the thesis was submitted / produced: 9. 5. 2018

Accessible from:: 31. 12. 2999

Thesis defence

• Supervisor: Ing. Petr Knotek, Ph.D.

University of Pardubice

Faculty of Chemical Technology

Master programme / field:
Chemistry and Technology of Materials / Material Engineering