Adiabatic control of surface plasmon-polaritons in a 3-layers graphene curved configuration

Huang, Wei; Liang, Shi‐Jun; Kyoseva, Elica; Ang, L. K.

doi:10.1016/j.carbon.2017.10.087

Cited by 39 publications

(22 citation statements)

References 41 publications

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“…The limitation comes from two aspects. One is the higher loss of SPPs in THz waveguides, comparing with the graphene SPPs waveguide coupler working at optical light region [24]. Typically, the propagation length of graphene SPPs can reach dozens of wavelength [34], which is slightly longer comparing with propagation length of SPPs in THz corrugated thin films structure (tens or dozens of wavelength [18]).…”

Section: Adiabatic Following Spps On Tri-layered Thin Film Couplermentioning

confidence: 99%

“…Consequently, current THz SPPs-based devices are facing the problems of high-cost fabrication processing and narrow transferring band. Most recently, to overcome this shortcoming, a remarkable paper applied coherent quantum control (stimulated raman adiabatic passage, short for STIRAP) into transferring the SPPs on the graphene sheets [24]. STIRAP is the well-known three-level coherent quantum control, which completely transfers population from first state to third state, without any population remaining in intermediate state [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, it is shown that STIRAP is exceedingly robust against controlling parameters under perturbations. The SITRAP has already been widely used in various domains, such as atomic molecular and optical physics [27,28], waveguide coupler [29,30], graphene electronic and optical effect [24,31].…”

Section: Introductionmentioning

confidence: 99%

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Robust and broadband integrated terahertz coupler conducted with adiabatic following

et al. 2019

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As the key concept in fabricating integrated device, surface plasmon-polaritons (SPPs) have been widely employed to artificially manipulate the electromagnetic waves in metallic surfaces. However, due to the highly structure-dependent resonance of SPPs, it is challengeable to develop a fixed device which can function at wide band. Here, we propose a novel broadband and robust SPPs directional coupler based on the tri-layered curved waveguides working at terahertz (THz) frequencies, where the coupling of SPPs between the adjacent waveguides can be modeled with coupled mode theory. By introducing the stimulated raman adiabatic passage quantum control technique, we achieve the complete transfer of SPPs from the input to the output waveguides in the range of 0.9-1.3 THz, and even considering the propagation loss, the transfer rate is still above 70%. Furthermore, the performance of our device is eminently robust because of its insensitivity to the geometry of structure and the wavelength of SPPs. As a result, our device can tolerate defect induced by fabrication processing and manipulate THz waves at broadband. This finding provides a new theoretical guideline in promoting THz on-demand applications, which is of significance in developing integrated THz devices.

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Section: Adiabatic Following Spps On Tri-layered Thin Film Couplermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Robust and broadband integrated terahertz coupler conducted with adiabatic following

et al. 2019

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“…Furthermore, it is also a fundamental technique in quantum computation and quantum information processing, including superconductivity qubit [4,5], Bose-Einstein condensate [6], NV centers in diamond [7], quantum dots and quantum wells in semiconductor [8]. Another very important application of complete population transfer is to achieve power or intensity inversion in classical systems, which is widely used in waveguide coupler [9], wireless energy transfer [10], polarization optics [11] and electrons, surface plasmon polaritons in graphene system [12,13].…”

Section: Introductionmentioning

confidence: 99%

Population transfer via a dissipative structural continuum

Huang¹,

Yin²,

Zhu³

et al. 2019

Phys. Rev. A

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We propose a model to study quantum population transfer via a structural continuum. The model is composed of two spins which are coupled to two bosonic modes separately by two controled pulses, and the two bosonic modes are coupled to a common structural continuum. We show that efficient population transfer can be achieved between the two spins by using a multi-level stimulated Raman adiabatic passage (STIRAP) across the continuum, which we refer to as straddle STIRAP via continuum. We also consider the stability of this model against different control parameters and show that efficient population transfer can be achieved even in presence a moderate dissipation.

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“…Graphene is a competitive two-dimensional material for active control due to its large conductivity range and ultrafast response [13,14]. Graphene-based metamaterials used as waveguides [15], switches [16] and sensors [17] have shown their potential in developing optical devices. Meanwhile, the THz devices integrated with graphene emerged the probability in active control: Li et al experimentally demonstrated an active diode for the THz waves consisting of a graphene-silicon hybrid film [18], and Kindness et al achieved active resonance frequency tuning of a THz metamaterial by integrating metal-coupled resonator arrays with electrically tunable graphene [19].…”

Section: Introductionmentioning

confidence: 99%

Two-Bit Terahertz Encoder Realized by Graphene-Based Metamaterials

et al. 2019

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Terahertz (THz) technologies have achieved great progress in the past few decades. Developing active devices to control the THz waves is the frontier of THz applications. In this paper, a new scheme of two-bit THz encoder is proposed. Different from the present THz modulators whose spectra at different bands are varied simultaneously, our encoder can realize the individually efficient modulation of every channel. The encoder comprises the double-sided graphene-based metamaterials, in which the graphene structures on each side are connected to the external electrodes individually. The well-designed metamaterials on the front and back sides determine the resonances at two different bands (0.20 THz and 0.33 THz) separately. Through simulating the performance of this device by changing the conductivities of the graphene on each side independently, we demonstrate two-bit encoding realized by the dual-band modulation of transmission amplitude with electronic control, and the modulation depth can reach as high as 79.6%. Our encoder can promote the development of multifunctional and integrated devices, such as frequency division multiplexers and logical circuitry, which will contribute to THz communications.

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Adiabatic control of surface plasmon-polaritons in a 3-layers graphene curved configuration

Cited by 39 publications

References 41 publications

Robust and broadband integrated terahertz coupler conducted with adiabatic following

Robust and broadband integrated terahertz coupler conducted with adiabatic following

Population transfer via a dissipative structural continuum

Two-Bit Terahertz Encoder Realized by Graphene-Based Metamaterials

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