Biomedical subjects

Antonio d'Alessandro

Publications and source records attributed to Antonio d'Alessandro.

2 recordsLinked to original sources

PubMed2005

Photonic devices based on preferential etching.

We introduce a design concept of optical waveguides characterized by a practical and reproducible process based on preferential etching of crystalline silicon substrates. Low-loss waveguides, spot-size converters, and power dividers have been obtained with polymers. We have also aligned liquid crystals in the waveguides and demonstrated guided propagation. Therefore this technology is a suitable platform for soft-matter photonics and heterogeneous integration.

Journal Article↗

PubMed2005

Electro-optic routing in a nematic liquid-crystal waveguide.

We propose a versatile guided-wave geometry encompassing electro-optic control for signal routing. A zero-gap directional coupler in liquid crystal can switch between two output states in the guide plane, permitting signal rerouting with modulation voltages as small as 70 mV. In the absence of an applied bias, no guiding--hence no modal output--is provided by the structure.

Journal Article↗