Low threshold current MOVPE grown GaInAs-Al(Ga)InAs separate confinement heterostructure multiquantum well metal-clad ridge-waveguide lasers emitting at 1585 nm
GaInAs-Al(Ga)InAs separate confinement heterostructure (SCH) multiquantum-well (MQW) metal-clad ridge-waveguide (MCRW) laser diodes were successfully fabricated for the first time from layer structures grown by atmospheric pressure (AP) metalorganic vapor-phase epitaxy (MOVPE) on InP substrate without any use of phosphine. CW operation of 2.9- mu m-wide and 400- mu m-long MCRW laser diodes emitting at 1585 nm was demonstrated with a minimum threshold current of 38 mA.<<ETX>>
GRIN-SCH AlGaInAs/InP quantum-well lasers emitting at 1300 nm
Buried-ridge GRIN-SCH quantum-well lasers operating at 1·3 μm with an AlGaInAs continuously graded separate confinement region and with AlGaInAs quantum wells have been demonstrated with CW threshold currents of 65 mA.
New Approaches for Positron Emission Tomography ( PET ) in Breast Carcinoma
Positron Emission Tomography (PET) is a nuclear medicine imaging technique which allows the quantitative evaluation of the distribution of several pharmaceuticals in a target area. PET therefore provides valuable information on the biochemical and biological activity inside a living subject in a noninvasive way, combining techniques applied in nuclear medicine with the precise localization achieved by computerized image reconstruction.