Tunneling induced two-dimensional phase grating in a quantum well nanostructure via third and fifth orders of susceptibility

Vafafard, Azar; Sahrai, Mostafa; Hamedi, Hamid Reza; Asadpour, Seyyed Hossein

doi:10.1038/s41598-020-64255-2

Cited by 33 publications

(34 citation statements)

References 47 publications

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“…The effect of tunneling induced transparency on diffraction efficiency of a weak probe light has been also studied in a multiple quantum well driving by a 2D standing-wave pattern 42 . It is realized that by adjusting the third and fifth order optical susceptibilities, the probe energy can transfer from zero order to high orders of gratings.…”

Section: Optically Induced Diffraction Gratings Based On Periodic Modmentioning

confidence: 99%

Optically induced diffraction gratings based on periodic modulation of linear and nonlinear effects for atom-light coupling quantum systems near plasmonic nanostructures

Vafafard

Sahrai

Siahpoush

et al. 2020

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We investigate the quantum linear and nonlinear effects in a novel five-level quantum system placed near a plasmonic nanostructure. Such a quantum scheme contains a double-V-type subsystem interacting with a weak probe field. The double-V-subsystem is then coupled to an excited state by a strong coupling field, which can be a position-dependent standing-wave field. We start by analyzing the first-order linear as well as the third and fifth order nonlinear terms of the probe susceptibility by systematically solving the equations for the matter-fields. When the quantum system is near the plasmonic nanostructure, the coherent control of linear and nonlinear susceptibilities becomes inevitable, leading to vanishing absorption effects and enhancing the nonlinearities. We also show that when the coupling light involves a standing-wave pattern, the periodic modulation of linear and nonlinear spectra results in an efficient scheme for the electromagnetically induced grating (EIG). In particular, the diffraction efficiency is influenced by changing the distance between the quantum system and plasmonic nanostructure. The proposed scheme may find potential applications in future nanoscale photonic devices.

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Section: Optically Induced Diffraction Gratings Based On Periodic Modmentioning

confidence: 99%

Optically induced diffraction gratings based on periodic modulation of linear and nonlinear effects for atom-light coupling quantum systems near plasmonic nanostructures

Vafafard

Sahrai

Siahpoush

et al. 2020

Sci Rep

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“…We observe that for and the maximum entanglement reaches DEM . These tunneling effects can be controlled by the applied voltage to the quantum dot molecule 48 . Therefore, the applied voltage can directly control quantum dot-photon entanglement.…”

Section: Resultsmentioning

confidence: 99%

Spatial-dependent quantum dot-photon entanglement via tunneling effect

joughi

Sahrai

2022

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Utilizing the vortex beams, we investigate the entanglement between the triple-quantum dot molecule and its spontaneous emission field. We present the spatially dependent quantum dot-photon entanglement created by Laguerre-Gaussian (LG) fields. The degree of position-dependent entanglement (DEM) is controlled by the angular momentum of the LG light and the quantum tunneling effect created by the gate voltage. Various spatial-dependent entanglement distribution is reached just by the magnitude and the sign of the orbital angular momentum (OAM) of the optical vortex beam.

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“…We observe that for 𝑇 𝐴 = 2, and 𝑇 𝐵 = 7 the maximum entanglement reaches DEM≅ 1.97. These tunneling effects can be controlled by the applied voltage to the quantum dot molecule [44].…”

Section: Resultsmentioning

confidence: 99%