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Journal of Iranian Association of Electrical and Electronics Engineers

Design of All-Optical Switch using Kerr Nonlinearities and Dipole Induced Transparency (DIT) with 4-level Nano-Crystals

H. Kheiryfam, Karim Abbasian, K. Eftekhari

Published Oct 10, 2015• 0 citations
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The proposed 1 × 8 and 8 × 1 all-optical controllable switch arrays can switch an optical pulse from an input port to one of eight output ports or from one of the eight input ports to only one output port. Where, the switching wavelength can be controlled by control fields to use for different optical pulses. In this paper dipole induced transparency (DIT) effect is used in photonic crystal quantum electrodynamics (PC-QED) cavity doped with a type three-level nano crystal as an all-optical switch.
In this work, we propose an all-optical controllable double state switch using the dipole induced transparency effect applied on multilevel nanocrystal doped to photonic crystal (PC) cavity. Using the proposed structure, with applying one control field the absorbing medium converted to transparent one and switching operation is obtained and then applying the second control field changes the transparent PC cavity to opaque one again. Analytical relation for the proposed switch is presented and studied by investigation of effects of parameters on switching characteristics.
We investigate the linear and nonlinear light pulse propagations in a three-level Λ-type molecular system with permanent dipole moments via electromagnetically induced transparency (EIT). We find that EIT characters in such a system depend strongly on the phase of control field, based on which a phase-controlled optical switch can be designed. We show that the Kerr nonlinearity of the system can be largely enhanced due to the control-field-induced quantum interference effect. We derive a nonlinear Schrödinger equation for the evolution of the probe-field envelope and demonstrate that it is possible to generate stable slow- and weak-light solitons in the system.