Electromagnetically induced transparency and bound in continuum states in double Aharonov-Bohm coupled rings

Mrabti, T.; Labdouti, Z.; Boudouti, El Houssaine El; Fethi, Fouad; Abouti, O. El; Djafari‐Rouhani, Bahram

doi:10.1016/j.matpr.2019.04.071

Cited by 2 publications

(1 citation statement)

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“…[43][44][45] Some years ago, [46] we studied symmetric and asymmetric Fano resonances [6] in a loop structure with two stubs grafted on both sides. Recently, [47] we have investigated the EIT resonances and BIC states in a simple mesoscopic structure made of double Aharonov-Bohm rings. This structure may exhibit a transmission gap and an EIT resonance in a transmission spectrum without inserting any perturbation in the arms of the rings; in particular we have shown that the shape of the EIT resonance and the width of the transmission dip can be tailored by varying the magnetic flux threading the rings as well as the geometry of the structure.…”

Section: Introductionmentioning

confidence: 99%

Bound in continuum states and induced transparency in mesoscopic demultiplexer with two outputs

et al. 2020

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We investigate the electronic transport in a simple mesoscopic cross structure made of two wires (stubs) grafted at the same point along a quantum waveguide. We show that the structure may exhibit important phenomena such as bound in continuum (BIC) states. These states are transformed into electromagnetically induced transparency (EIT) resonance by detuning slightly the lengths of the stubs. The last phenomenon is used to propose and study a mesoscopic demultiplexer device with an input waveguide and two output waveguides. We give closed-form expressions of the geometrical parameters that allow a selective transfer of a given state in the first waveguide without perturbing the second waveguide. The effect of temperature on the transmission resonances is also examined by using Landauer–Büttiker formula. The analytical results of the dispersion relation and transmission and reflection coefficient are obtained using the Green’s function method.

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