Scientists at Northwestern University (Evanston, IL) have fabricated highpower laser diodes based on indium gallium arsenide phosphide (InGaAsP) latticematched to gallium arsenide (GaAs) substrates. These devices have operated with significantly improved reliability in the same wavelength range as commercially available aluminum gallium arsenide (AlGaAs) laser diodes. They reported that structure design is the key factor in fabricating this type of laser diode. With an emission wavelength of 808
The Dirac-vortex state, a mathematical analog of Majorana fermions (a.k.a. angel particles) within superconducting electronic systems, offers a larger free spectral range than...
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