Linear and Nonlinear Properties of Nanostructures

Self-assembled 245-nm silica nanospheres These structures are later ion-implanted with Ge. Nanoclusters of the guest material, approximately 3-nm in size, are formed within the silica nanospheres following annealing at 1000oC. 

The final result is 'nano within nano'.

Linear transmission xhibits a dip due to the periodic opaline structure Transmission at various laser intensities 

The structures have been ion-implanted with Si and Er ions as well.