A tunable radiation emitting semiconductor device includes 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 structure is operable to emit light radiation in
response to a current flow therethrough. Moreover, the elongated
structure is fabricated to be sufficiently narrow for quantum confinement
of charge carriers associated with the current flow to occur therein.
Furthermore, the structure further includes an electrode arrangement for
applying an electric field to the elongated structure for causing bending
of its bandgap characteristic for modulating a wavelength of the light
radiation emitted in operation from the structure in response to the
current flow therethrough.