25996
The mechanism of the laser is associated with the in - plane random resonator cavities formed in the ZnO films and the elaborate hollow - shaped SiO2 cladding pattern , which prevent the lateral diffusion of injection current and ultimately lower the threshold current of the laser diode .
 Chemical: ZnO; Chemical: SiO2
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ZnO; Chemical: SiO2