( ( Zinc oxide ) ( ( is ( ( ( a semiconductor ) ( with ( ( ( a ( blue luminescence ) ) and ) ( a ( high ( optical gain ) ) ) ) ) ) ( to ( amplify light ) ) ) ) . ) )
(ROOT (S (NP (JJ Zinc) (NN oxide)) (VP (VBZ is) (NP (NP (DT a) (NN semiconductor)) (PP (IN with) (NP (NP (DT a) (JJ blue) (NN luminescence)) (CC and) (NP (DT a) (JJ high) (JJ optical) (NN gain)))) (S (VP (TO to) (VP (VB amplify) (NP (NN light))))))) (. .)))
Zinc oxide is a semiconductor with a blue luminescence and a high optical gain to amplify light.
(ROOT (S (NP (NP (NNP Producing) (NN light)) (PP (IN without) (NP (DT a) (JJ high) (NN temperature)))) (VP (VBZ is) (VP (VBN called) (S (ADJP (JJ luminescence))))) (. .)))