Low loss silicon waveguides for the terahertz spectral region

Chip scale terahertz dielectric waveguides, consisting out of high resistivity silicon as a core material have been fabricated. The waveguide loss is measured to be similar to 1dB/cm at both 1 THz and 2.5 THz

Physical and chemical aspects of a new porous hydroxyapatite.

3The new engineered porous hydroxyapatite (EP-HA) described in this paper seems to be suitable as a bone substitute. Its physico-chemical characteristics and morphology are similar to those of natural bone. Study of its histological behaviour in humans revealed bone formation within and around the porous hydroxyapatite that is markedly resorbed.noneR. Martinetti; L. Dolcini; C. ManganoR., Martinetti; L., Dolcini; Mangano, Carl