Fig. 2: Photographs of Eu(III) lumino-glass.
From: Chiral lanthanide lumino-glass for a circularly polarized light security device

Photographs of Eu(III) lumino-glass (Eu(+tfc)-tmpo(2). UV-off (a), UV-on (b, λex = 365 nm)).
From: Chiral lanthanide lumino-glass for a circularly polarized light security device
Photographs of Eu(III) lumino-glass (Eu(+tfc)-tmpo(2). UV-off (a), UV-on (b, λex = 365 nm)).