Effect of energy level configuration on  storage of  optical solitons in InAs/GaAs quantum dot electromagnetically induced transparency medium

Wang, Yin; Zhou, Shaoxia; Qiao, Chunming; Deng, Yonghe

doi:10.7498/aps.72.20221965

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…Michael等 [43] 发现点间TIT不仅可以抑制介质对光的吸收, 而且还可以调节光通过系统的传播速度. 让一束探测光通过量子点EIT介质去传播 [44,45] , 发现体系所形成的光孤子能够存储起来.…”

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Effect of inter-dot tunneling coupling on soliton dynamical behaviors in four-level triple quantum dot EIT medium

Wang,

Chen

et al. 2024

Acta Phys. Sin.

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Soliton, which can travel over long distance without attenuation and shape change due to the balance of the interplay between dispersion (or diffraction) and nonlinearity in nonlinear media, becomes a good information carrier in quantum information processing and transmission. Up to now, the study on the optical solitons mainly is focus on ultra-cold atomic electromagnetic induction transparency (EIT) media. This is mainly because ultra-cold atomic systems can generate strong nonlinear effects under low light excitation. However, for the practical application, it is a large challenge to control accurately the optical solitons dynamics in the atomic EIT media due to its low temperature (which approaches to absolute zero) and rarefaction. Fortunately, with the maturity of semiconductor quantum production technology, quantum dots have extensively applying prospect in quantum information processing and transmission. So, in the paper, we study the optical solitons dynamics in a four-level asymmetric array-type three quantum dots EIT medium.Based on the current experiment, we first propose a four-level asymmetric array-type three quantum dots EIT model. Subsequently, by using amplitude variable approach combined with multi-scale method, we study analytically the propagation of a probe pulses in this system. It is shown that when one (the another) inter-dot tunneling coupling is turned on (off), only a single transparency window appears in the center range of the probe field detuning. Only if two inter-dot tunneling couplings are turned on, two transparent windows are distributed on both sides of the central region of the probe field detuning. And the width of the single or two transparent window becomes wider with the increasing strength of the inter-dot tunneling coupling. For the nonlinear case, by choosing appropriate parameters in the area of the transparency window, the stable propagation of soliton can be realized. Interestingly, we find that the strength of the inter-dot tunneling coupling has an important effect on the soliton dynamics behaviors. In the case that one (the another) inter-dot tunneling coupling is turned on (off), with the increasing strength of the inter-dot tunneling coupling, the velocity of the soliton exhibits a trend of first increasing and then decreasing, as well as the amplitude of the soliton appears a increasing trend for ever. For the case that two inter-dot tunneling couplings are turned on, with the increasing strength of the two inter-dot tunneling coupling, the velocity of the soliton emerges a decreasing trend for ever, while the amplitude of the soliton presents a trend of first decreasing and then increasing. Thus, the amplitude modulation effect of optical soliton can be realized in semiconductor quantum dot devices.

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Effect of inter-dot tunneling coupling on soliton dynamical behaviors in four-level triple quantum dot EIT medium

Wang,

Chen

et al. 2024

Acta Phys. Sin.

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Storage and retrieval of solitons in electromagnetically induced transparent system of V-type three-level diamond nitrogen-vacancy color centers

Tan,

Wang,

Dong

et al. 2024

Acta Phys. Sin.

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Comparing with light, the solitons, which are from the balance between dispersion and nonlinearity of the system, possess higher stability and fidelity as the information carries in quantum information processing and transmission, and have gained considerable attention in ultra-cold atomic EIT media. To date, EIT model on the three-level ultra-cold atoms realized experimentally, is ladder-, ∧-, and V-type mode. Current studies showed that the solitons cannot be stored in V-type three energy level ultra-cold atomic EIT media but it can be stored in ladder- and ∧-type. It is mainly because the atoms of the V-type system initially are in the excited state, while the atoms of the ladder- and ∧-type systems initially are in the ground state. For the practical applications, it is a large challenge to control accurately the solitons storage in the ultra-cold atomic EIT media due to its ultralow temperature and rarefaction. Fortunately, with the maturity of semiconductor quantum technology, quantum dots have extensively applying prospect in quantum information processing and transmission. However, the solitons cannot also be stored in V-type three level InAs/GaAs quantum dot EIT media, while it can be stored in ladder-type and ∧-type.<br>Based on this, we, in the paper, propose a V-type three level nitrogen-vacancy (NV) center EIT model formed by a weak pored field and a strong control field being coupled between different energy level of NV center in diamond. Subsequently, the linear and nonlinear properties of system are studied by using semiclassical theory combined with multiple scale method. It is shown that when control field is turned on, the linear absorption curve of the system presents EIT window. And the width of the EIT window increases with the increasing strength of magnetic induction of the control field. In the nonlinear case, the solitons formed can stably propagate over long distance. Interestingly, the solitons can be stored and retrieved by switching off and on the magnetic field of control field. Moreover, the amplitude of the stored solitons can be modulated by the magnetic induction strength of control field. This result indicates that solitons as information carriers in quantum information processing and transmission of NV center can greatly improve the fidelity of information processing.

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Effect of energy level configuration on storage of optical solitons in InAs/GaAs quantum dot electromagnetically induced transparency medium

Cited by 2 publications

References 37 publications

Effect of inter-dot tunneling coupling on soliton dynamical behaviors in four-level triple quantum dot EIT medium

Effect of inter-dot tunneling coupling on soliton dynamical behaviors in four-level triple quantum dot EIT medium

Storage and retrieval of solitons in electromagnetically induced transparent system of V-type three-level diamond nitrogen-vacancy color centers

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