Terahertz Technologies and Its Applications

Pacheco‐Peña, Víctor

doi:10.3390/electronics10030268

Cited by 12 publications

(5 citation statements)

References 20 publications

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“…The good stability and high‐rate operation of NiTeSe‐based devices were exploited to engineer a microwave receiver, whose relevance is associated to the next‐generation six‐generation wireless communication technology, mainly used in the field of national defense and civil communications. [ 19 ] We devised high‐frequency photodetectors, depicted in Figure 5a, with metal–NiTeSe–metal configuration, within a bow‐tie‐type antenna including sub‐wavelength channel spacing between two similar metallic contacts (see Experimental Section for details on fabrication). An optical micrograph of the device is shown in Figure 5a, in which the bow‐tie‐type antenna can accumulate more charges and enhance the microwave electric‐field intensity along the direction of 6µm horizontal channel.…”

Section: Resultsmentioning

confidence: 99%

Kitkaite NiTeSe, an Ambient‐Stable Layered Dirac Semimetal with Low‐Energy Type‐II Fermions with Application Capabilities in Spintronics and Optoelectronics

Vobornik

Sarkar

Zhang

et al. 2021

Adv Funct Materials

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The emergence of Dirac semimetals has stimulated growing attention, owing to the considerable technological potential arising from their peculiar exotic quantum transport related to their nontrivial topological states. Especially, materials showing type-II Dirac fermions afford novel device functionalities enabled by anisotropic optical and magnetotransport properties. Nevertheless, real technological implementation has remained elusive so far. Definitely, in most Dirac semimetals, the Dirac point lies deep below the Fermi level, limiting technological exploitation. Here, it is shown that kitkaite (NiTeSe) represents an ideal platform for type-II Dirac fermiology based on spin-resolved angle-resolved photoemission spectroscopy and density functional theory. Precisely, the existence of type-II bulk Dirac fermions is discovered in NiTeSe around the Fermi level and the presence of topological surface states with strong (≈50%) spin polarization. By means of surface-science experiments in near-ambient pressure conditions, chemical inertness towards ambient gases (oxygen and water) is also demonstrated. Correspondingly, NiTeSe-based devices without encapsulation afford long-term efficiency, as demonstrated by the direct implementation of a NiTeSe-based microwave receiver with a room-temperature photocurrent of 2.8 µA at 28 GHz and more than two orders of magnitude linear dynamic range. The findings are essential to bringing to fruition type-II Dirac fermions in photonics, spintronics, and optoelectronics.

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Section: Resultsmentioning

confidence: 99%

Kitkaite NiTeSe, an Ambient‐Stable Layered Dirac Semimetal with Low‐Energy Type‐II Fermions with Application Capabilities in Spintronics and Optoelectronics

Vobornik

Sarkar

Zhang

et al. 2021

Adv Funct Materials

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“…Terahertz (THz) communication is considered an enabling technology to envisage beyond-5G and 6G systems [ 165 , 166 , 167 ]. Industry 4.0 and beyond can also benefit from THz communication for future mission-critical applications with the high demand for massive URLLC [ 168 , 169 , 170 , 171 , 172 ].…”

Section: Research Opportunities and Future Directionsmentioning

confidence: 99%

Millimeter-Wave Smart Antenna Solutions for URLLC in Industry 4.0 and Beyond

Jabbar

Abbasi

Anjum

et al. 2022

Sensors

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Industry 4.0 is a new paradigm of digitalization and automation that demands high data rates and real-time ultra-reliable agile communication. Industrial communication at sub-6 GHz industrial, scientific, and medical (ISM) bands has some serious impediments, such as interference, spectral congestion, and limited bandwidth. These limitations hinder the high throughput and reliability requirements of modern industrial applications and mission-critical scenarios. In this paper, we critically assess the potential of the 60 GHz millimeter-wave (mmWave) ISM band as an enabler for ultra-reliable low-latency communication (URLLC) in smart manufacturing, smart factories, and mission-critical operations in Industry 4.0 and beyond. A holistic overview of 60 GHz wireless standards and key performance indicators are discussed. Then the review of 60 GHz smart antenna systems facilitating agile communication for Industry 4.0 and beyond is presented. We envisage that the use of 60 GHz communication and smart antenna systems are crucial for modern industrial communication so that URLLC in Industry 4.0 and beyond could soar to its full potential.

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“…The inconsistent size and position of transmitters and receivers lead to serious signal leakage, which not only makes it difficult to adjust spatial layout but also causes high transmission loss. 1 A variety of THz waveguides have been explored for efficient transmission, which would be classified into two categories, i.e., metallic waveguides and dielectric waveguides. The non-planar metallic waveguides consist of metallic wires, parallel plate waveguides, two-wire structures, slit waveguides, 2 etc.…”

Section: Introductionmentioning

confidence: 99%

“…Conventional terahertz (THz) systems are based on free-space communication. The inconsistent size and position of transmitters and receivers lead to serious signal leakage, which not only makes it difficult to adjust spatial layout but also causes high transmission loss 1 . A variety of THz waveguides have been explored for efficient transmission, which would be classified into two categories, i.e., metallic waveguides and dielectric waveguides.…”

Section: Introductionmentioning

confidence: 99%

Low-loss flexible terahertz photonic crystal fiber

Qian

Yang

et al. 2023

Opt. Eng.

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.This paper presents a hybrid porous-core flexible photonic crystal fiber (PCF), which has the potential for low-loss guidance of broadband terahertz (THz) waves at low THz bands. Here, the cyclic olefin polymer TOPAS is used for the main material to increase the flexibility of PCF. The central hybrid porous-core area contains a circular and hexagonal design, which reduces the loss of PCF. Simulation results show that the proposed fiber has a very low confinement loss of 3.47 × 10 − 6 dB / cm at 500 GHz operating frequency. The bending loss at a bending radius of 1 cm is as low as 3.2 × 10 − 4 dB / cm. The negligible modal loss facilitates the flexible application to THz systems. Moreover, the fabrication of the proposed PCF design is compatible with widely used methods and technologies, including stacking and drawing, extrusion and drilling. This newly proposed hybrid design of the porous-core region can be considered as an improved version in the research of THz porous-core waveguides.

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Terahertz Technologies and Its Applications

Abstract: The terahertz frequency range (0 [...]

Cited by 12 publications

References 20 publications

Kitkaite NiTeSe, an Ambient‐Stable Layered Dirac Semimetal with Low‐Energy Type‐II Fermions with Application Capabilities in Spintronics and Optoelectronics

Kitkaite NiTeSe, an Ambient‐Stable Layered Dirac Semimetal with Low‐Energy Type‐II Fermions with Application Capabilities in Spintronics and Optoelectronics

Millimeter-Wave Smart Antenna Solutions for URLLC in Industry 4.0 and Beyond

Low-loss flexible terahertz photonic crystal fiber

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