Patent ID: 7633081
Filing Date: 2009-12-15
Classification: H01L

Abstract:
1. A tunable radiation emitting semiconductor device comprising at least one elongated structure at least partially fabricated from one or more semiconductor materials exhibiting a bandgap characteristic including one or more energy transitions whose energies correspond to photon energies of light radiation, the at least one structure thereby being operable to emit light radiation therefrom in response to a current flow therethrough, the at least one elongated structure being sufficiently narrow for quantum confinement of charge carriers associated with the current flow to occur therein, the at least one elongated structure further comprising an electrode arrangement for applying an electric field to the at least one elongated structure for causing bending of its bandgap characteristic for modulating a wavelength of the light radiation emitted in operation from the at least one structure in response to the current flow through it, wherein the at least one elongated structure comprises a plurality of regions of mutually different composition, the plurality of regions defining at least one semiconductor junction whereat carrier recombination associated with the current flow occurs in operation, said recombination operable to generate the light radiation for emission from the device.