Achievement of tailored laser frequencies by fine-tuning the structural parameters of Fibonacci’s in AlxGa1−xAs/GaAs superlattices

• Investigate the tunneling conduction in AlxGa1−xAs/GaAs Fibonacci superlattices.
• Fine-tuning the structural parameters of Fibonacci’s.
• Increasing the width of wells Fibonacci allows to the widening of minigaps.
• The barrier thickness of Fibonacci bf acts on the width of subbands.
• The barrier height FibonacciVf permit to control the degree of structural disorder.

We investigate the tunneling conduction in AlxGa1−xAs/GaAs Fibonacci superlattices. Using the transfer matrix formalism, the effective mass and envelope function approximations, we calculate the transmission coefficient of quasiperiodic multibarrier system. We examine numerically the effect of the Fibonacci’s structural parameters on the electronic energy spectra of Fibonacci Superlattices (FSL). Ours results show that increasing the width of Fibonacci’s wells af allows to the confinement of subminibands with a widening of minigaps, this causes a consistent and coherent fragmentation. The barrier thickness of Fibonacci bf acts on the width of subminibands by controlling the interaction force between neighboring eigenstates. Its increase gives rise to singularly extended states. The barrier height Fibonacci Vf permit to control the degree of structural disorder in these structures. The variation of these parameters permits the design of laser with modulated wavelength.