Floquet engineering of dressed surface plasmon polariton modes in plasmonic waveguides

Herath, Kosala; Premaratne, Malin

doi:10.1103/physrevb.106.235422

Cited by 6 publications

(37 citation statements)

References 131 publications

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“…The Gordon-Volkov method [45,55] enables the identification of precise solutions to the time-dependent Schrödinger equation. By using the principles of Floquet theory [56] and considering the finite dimensions of the 2DEG, it is possible to represent these wave function solutions, as Floquet states in the momentum space in a comprehensible manner…”

Section: Floquet States In Dressed 2d Semiconductor Quantum Wellmentioning

confidence: 99%

“…corresponds to the n-th diagonal element of the inverse scattering time matrix [42]. The derivation of this expression involves the utilization of the Floquet-Fermi golden rule and the t-t¢ formalism [42,45,49]. According to the Floquet-Fermi golden rule, the inverse scattering time 1/τ(ò, k) of electrons in a dressed system can be expanded twice using the Fourier series expansion.…”

Section: Floquet-drude Conductivitymentioning

confidence: 99%

“…Essentially, these assumptions enable us to express the total scattering potential in the 2DEG as an aggregate of independent single-impurity potentials υ(r). Within the framework of disorder potential assumptions, the inverse scattering time matrix in a Floquet quantum system can be evaluated utilizing the Floquet-Fermi golden rule [42,45] which states that…”

Section: Floquet-drude Conductivitymentioning

confidence: 99%

“…The concept of Floquet engineering has emerged from these advancements, which involves customizing the Floquet electronic band structure through a periodic drive to alter material properties [42]. This encompasses the discovery of novel non-equilibrium topological states of matter [43], the engineering of correlated quantum phases [44], and the manipulation of quantum many-body systems [42,45,46]. In the realm of Floquet physics, one can predict the behavior of driven systems without relying on perturbation methods by treating the quantum system and the electromagnetic field as a single composite quantum system, known as the dressed system.…”

Section: Introductionmentioning

confidence: 99%

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Floquet engineering-based frequency demodulation method for wireless THz short-range communications

Herath,

Nirmalathas,

Gunapala

et al. 2023

Phys. Scr.

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This study introduces a novel theoretical framework for detecting and decoding wireless communication signals in the nanoscale range operating at terahertz (THz) frequencies. Initially, we investigate the Floquet states in a dressed 2D semiconductor quantum well and derive an analytical expression to determine its longitudinal conductivity. The results indicate that the longitudinal conductivity of a dressed 2D semiconductor can be tailored to specific requirements by manipulating the frequency of the external dressing field. Furthermore, carefully selecting the intensity and polarization type of the external dressing field enables fine-tuning and optimization of the conductivity. To evaluate the effectiveness of each dressing field configuration, we present a Figure of Merit (FoM) assessment that determines the maximum possible change in conductivity within the considered frequency range. The proposed theory introduces a mechanism capable of identifying frequency-modulated communication signals in the THz range and performing frequency demodulation. We comprehensively analyze of the demodulator's transfer function in the receiver. Consequently, we establish that the transfer function exhibits linear behavior over a specific frequency range, rendering it suitable for frequency demodulation. Finally, we provide a numerical illustration of a frequency demodulation scenario. The breakthrough uncovered in this study opens up possibilities for the development of high-efficiency, lightweight, and cutting-edge chip-scale wireless communication devices, circuits, and components.

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Section: Floquet States In Dressed 2d Semiconductor Quantum Wellmentioning

confidence: 99%

Section: Floquet-drude Conductivitymentioning

confidence: 99%

Section: Floquet-drude Conductivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Floquet engineering-based frequency demodulation method for wireless THz short-range communications

Herath,

Nirmalathas,

Gunapala

et al. 2023

Phys. Scr.

Self Cite

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“…14 In reality, periodic driving can be achieved by, for example, surface plasmon, which is the collective oscillations of free electrons in the metal. 15 Light, as an electromagnetic field, can also serve as a tool to achieve Floquet engineering. Under such Floquet engineering, the transport of energy and charge in organic semiconductors can be enhanced.…”

Section: ■ Introductionmentioning

confidence: 99%

Electron Transfer at Molecule–Metal Interfaces under Floquet Engineering: Rate Constant and Floquet Marcus Theory

Wang,

Dou

2023

ACS Phys. Chem Au

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Electron transfer (ET) at molecule−metal or molecule−semiconductor interfaces is a fundamental reaction that underlies all electrochemical processes and substrate-mediated surface photochemistry. In this study, we show that ET rates near a metal surface can be significantly manipulated by periodic driving (e.g., Floquet engineering). We employ the Floquet surface hopping and Floquet electronic friction algorithms developed previously to calculate the ET rates near the metal surface as a function of driving amplitudes and driving frequencies. We find that ET rates have a turnover effect when the driving frequencies increase. A Floquet Marcus theory is further formulated to analyze such a turnover effect. We then benchmark the Floquet Marcus theory against Floquet surface hopping and Floquet electronic friction methods, indicating that the Floquet Marcus theory works in the strong nonadiabatic regimes but fails in the weak nonadiabatic regimes. We hope these theoretical tools will be useful to study ET rates in the plasmonic cavity and plasmon-assisted photocatalysis.

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A Floquet engineering approach to optimize Schottky junction-based surface plasmonic waveguides

Herath

Gunapala

Premaratne

2023

Sci Rep

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The ability to finely control the surface plasmon polariton (SPP) modes of plasmonic waveguides unveils many potential applications in nanophotonics. This work presents a comprehensive theoretical framework for predicting the propagation characteristics of SPP modes at a Schottky junction exposed to a dressing electromagnetic field. Applying the general linear response theory towards a periodically driven many-body quantum system, we obtain an explicit expression for the dielectric function of the dressed metal. Our study demonstrates that the dressing field can be used to alter and fine-tune the electron damping factor. By doing so, the SPP propagation length could be controlled and enhanced by appropriately selecting the intensity, frequency and polarization type of the external dressing field. Consequently, the developed theory reveals an unexplored mechanism for enhancing the SPP propagation length without altering other SPP characteristics. The proposed improvements are compatible with existing SPP-based waveguiding technologies and could lead to breakthroughs in the design and fabrication of state-of-the-art nanoscale integrated circuits and devices in the near future.

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Floquet engineering of dressed surface plasmon polariton modes in plasmonic waveguides

Cited by 6 publications

References 131 publications

Floquet engineering-based frequency demodulation method for wireless THz short-range communications

Floquet engineering-based frequency demodulation method for wireless THz short-range communications

Electron Transfer at Molecule–Metal Interfaces under Floquet Engineering: Rate Constant and Floquet Marcus Theory

A Floquet engineering approach to optimize Schottky junction-based surface plasmonic waveguides

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