Effect of nanobridges on the emission spectra of a quantum dot-quantum well tunneling pair

Emission in the narrow spectral range 950–1000 nm is obtained at the nanobridge optical transition involving experimentally and theoretically observed hybrid states in the InGaAs system, i.e., quantum dot-nanobridge-quantum well. It is experimentally shown that the oscillator strength of the new transition sharply increases in the built-in electric field of a pin junction. In the mode of weak currents in the system under study, the nanobridge transition is the dominant electroluminescence channel. At current densities $>$ 10 A cm$^2$, nanobridge “burning” is observed, after which the system becomes a “quasi-classical” quantum dot-quantum well tunneling pair separated by a barrier.