Polarization-Dependent Photoluminescence in ZnO-ZnWO4 Eutectic

Eutectic composites are self-organized materials which exhibit intriguing electromagnetic properties, leading to new possibilities with respect to the constituent materials. Here we investigate emission properties in ZnO{###}
$\text{ZnWO}_{4}$
eutectic; this self-organized material consists of ZnO lamellae specially oriented with respect to the biaxial
$\text{ZnWO}4$
matrix. The sample is fabricated by means of the micro-pulling-down
$(\mu-\text{PD})$
[1],[2], resulting in
$\approx 240$
nm ZnO lamellae, embedded in a fairly regular manner in the
$\text{ZnWO}_{4}$
matrix (inset in Fig. 1(a)). A strong exciton emission at room temperature in the blue range previously confirmed the high quality and crystallinity of the ZnO phase.