Electro-Optic Switching in a Double Quantum Dot Injected with a Squeezed Vacuum Field

Optical bistability (OB) is theoretically examined for a double quantum dot (QD) system placed in a ring cavity that is injected with a squeezed vacuum (SV) field. The SV field is injected at the output mirror of the cavity scheme to couple a one-photon transition of the atomic system. Interdot electron tunneling, which occurs between the two QDs, affects the steady-state behavior, from mono-to-multistable behaviors, of the system in the presence of SV field. We investigate the switching effects employing the SV field parameters, electron tunneling, and dispersive switching effects to demonstrate the one-way, two-way, and multiswitching processes. The electron tunneling strength of the dots injected with the SV field helps in designing an optical multiswitch. The SV-injected field exhibits more multiswitchings and larger bistable areas compared with the same intensities of coherent or thermal injected field case.