Commensurate photon-irradiated Fano–Kondo tunneling through a quantum dot embedded Aharonov–Bohm interferometer

The commensurate photon-irradiated mesoscopic transport in a strongly correlated quantum dot (QD) embedded Aharonov–Bohm (AB) interferometer has been investigated. We focus our investigation on the dynamic Kondo and Fano cooperated effect affected by the double commensurate MWFs with q=ω2/ω1q=ω2/ω1 being an arbitrary integer, where ω1ω1 and ω2ω2 are the two frequencies of the fields. The general tunneling current formula is derived by employing the nonequilibrium Green's function technique, and the different photon absorption and emission processes induced nonlinear properties have been studied to compare with the single-field system where q=0q=0. Our numerical calculations are performed for the special cases with two commensurate fields possessing q=1,2q=1,2. The Kondo peak can be suppressed to be a Kondo valley for the case where the commensurate number q=1q=1, and the Fano asymmetric structure exhibits in the differential conductance quite evidently. Different commensurate number q   contributes different photon absorption and emission effects. However, the conductance for the case of q=2q=2 possesses more peaks and heavier asymmetric structure than the situations of q=0,1q=0,1. The enhancement of satellite peaks behaves quite differently for the two cases with q=1q=1, and q=2q=2. The asymmetric peak–valley structure is adjusted by the gate voltage, commensurate MWFs, AB flux, source-drain bias, and non-resonant tunneling strength to form novel Fano and Kondo resonant tunneling.