No abstract

Three‐dimensional structures of colloidal particles (see Figure for an assembly of polystyrene particles) have been constructed on a water surface rather than on a planar substrate. This method can be used to generate colloidal particles three‐dimensionally irrespective of their size, and if a generated colloidal opal structure is infiltrated by semiconducting materials it could be used for a large range of optical applications.

No abstract

We report on efficient and fast hybrid photorefractive polymer sensitized with cadmium selenide ͑CdSe͒ quantum dots. The surface of the quantum dots was treated with 4-methylbenzenethiol. This surfactant is responsible for efficient photoinduced charge generation in the composite, leading to fast grating build-up times of 100 ms and below. Overmodulation of the diffraction efficiency was observed at an applied field of 60 V / m.