An Eigenmode Study of Nanoantennas from Terahertz to Optical Frequencies

Paschaloudis, Konstantinos D.; Zekios, Constantinos L.; Trichopoulos, Georgios C.; Farmakis, Filippos; Kyriacou, George A.

doi:10.3390/electronics10222782

Cited by 4 publications

(2 citation statements)

References 62 publications

(111 reference statements)

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“…[38] The surface currents for the characterization of Nano antennas and the radiated power contributed by the metallic layers for a microstrip patch antenna at 0.1-3 THz and plasmonic nanoantenna at 400-600 THz are investigated. [39] Polydimethylsiloxane (PDMS) is a mineral-organic polymer of the siloxane family, and it is a very cheap material. It is a member of a class of polymeric organosilicon compounds known as silicones.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Investigation of the Electrical and Dielectric Properties of PDMS‐CNT

Karuppiah,

Nambi Ramachary,

Kulandai Samy

et al. 2024

Macro Theory & Simulations

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In the present study, the dielectric and electrical properties of the carbon nanotube/polydimethylsiloxane (CNT/PDMS) composite are theoretically analyzed for various doping concentrations. For both single‐walled and multiwalled CNTs, the work is done between 75 THz and 750 THz.The behavior of the dielectric constant, loss factor, and conductivity were analyzed as functions of frequency. It is observed that there is no appreciable change in the real part of the dielectric constant at high frequencies in single‐walled CNT. The loss tangent is high at lower frequencies, and the loss peak is observed at a particular frequency. The Cole‐Cole plot is used to interpret the static‐ and high‐frequency dielectric constants and relaxation time of the composite. With increasing concentrations of SCNT and MCNT, the conductivity at the obtained peak maximum shifts to a lower frequency.This article is protected by copyright. All rights reserved

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Section: Introductionmentioning

confidence: 99%

A Theoretical Investigation of the Electrical and Dielectric Properties of PDMS‐CNT

Karuppiah,

Nambi Ramachary,

Kulandai Samy

et al. 2024

Macro Theory & Simulations

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“…The communication distances could be increased up to a few meters, by identifying several transparency windows in the THz band, however, at the cost of achievable data rate [16], [17]. Nevertheless, 0.1 THz to 10 THz band is chosen to be the preferred frequency band of operation for the nanomachines [1], [18]- [20] due to several reasons, one being the graphene nanoantennas [21], [22] and plasmonic field-effect transistors (TeraFETs) [23] being established to operate in the THz band, which will result in the nanotranceivers design using graphene and its derivatives [24]- [26].…”

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confidence: 99%

Performance Analysis of Time-Hopping Multiple Access Using Multi-Level PPM for Terahertz Nanocommunication

Singh¹,

Jung²

2022

Preprint

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<p>Terahertz (THz) band nanocommunication is envisioned to revolutionize the future of wireless communications enabling applications in the nanoscale domains including the internet of nanothings, wireless on-chip communications, and advanced health monitoring. The communication among nanodevices, however, is hindered by the THz channel, which is highly frequency-selective and distance-dependent in nature, ultimately restricting the nanocommunication distances to a few millimeters. Moreover, multiple nano-devices trying to access the channel simultaneously increase interference in the overall communication system. This paper proposes a new pulse-based modulation for nanonetworks called multi-level pulse position modulation (ML-PPM) and analyzes its performance in the multiuser nanocommunication scenario. In ML-PPM, each nanomachine in the nanonetwork first transforms the transmitting bits into multi-levels by using several orthogonal codes, and then, each multi-level is modulated as a pulse position. The ML-PPM signal thus generated is subsequently time-hopped to achieve multiple access. As a consequence of employing orthogonal coding, the spreading gain is achieved at the nanoreceiver, which improves the performance of the proposed scheme. The time-hopped multilevel PPM scheme is evaluated in terms of bit error rate (BER) and link capacity, for different THz propagation conditions and different system design parameters. The results show that for a THz channel concentrated with 10% water vapor, a link capacity of approximately 1 Gigabits-per-second is achieved for a transmission distance of 0.5mm.</p>

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Multilevel Pulse Position Modulation With Level Trimming for Electromagnetic Nanocommunications in the Terahertz Band

Singh

Kim

2022

IEEE Access

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Nanomachines are submicrometer-scale devices led by nanotechnology that can perform simple sensing, local actuation, limited data processing, storage, and communication tasks in the terahertz (THz) band, that is, from 0.1-10 THz. Electromagnetic nanocommunication among nanomachines results in a nanonetwork which could breakthrough promising applications in multiple domains such as software-defined metamaterials, in-body communication, and on-chip communication. This study adopts a modulation scheme for nanomachine communication based on multilevel pulse position modulation (ML-PPM). The multilevel scheme uses several orthogonal codes and is combined with PPM to generate the final transmit signal consisting of several multilevels. In this paper, we propose a more advanced scheme called level trimming to further boost the data rates of the ML-PPM scheme. Employing level-trimming, we transmit a fewer number of levels than required in ML-PPM, which will results in an spectral efficiency gain at the nanoreceiver. The simulation results reveal that the link capacity of the proposed scheme can be increased more than twofold using the level-trimming approach while the error rate performance remains better than the conventional ML-PPM. Moreover, the computational complexity of transceivers is reduced with the transmission of fewer levels, which is a significant necessity in nanocommunication. Also, although level-trimming causes artificial errors, it also improves the decoding performance by reducing the number of levels. We believe that the potential impact of this study will open doors for further investigations on various possible modulation formats for THz nanocommunication.

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An Eigenmode Study of Nanoantennas from Terahertz to Optical Frequencies

Cited by 4 publications

References 62 publications

A Theoretical Investigation of the Electrical and Dielectric Properties of PDMS‐CNT

A Theoretical Investigation of the Electrical and Dielectric Properties of PDMS‐CNT

Performance Analysis of Time-Hopping Multiple Access Using Multi-Level PPM for Terahertz Nanocommunication

Multilevel Pulse Position Modulation With Level Trimming for Electromagnetic Nanocommunications in the Terahertz Band

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