The state of art of terahertz sources: A communication perspective at a glance

Yazgan, Ayhan; Jofre, L.; Romeu, J.

doi:10.1109/tsp.2017.8076101

Cited by 4 publications

(2 citation statements)

References 63 publications

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“…This has also led to the THz band becoming the last field in the electromagnetic spectrum that has not been fully explored and fully utilized. When traditional electronics and optical radiation sources approach the THz frequency band from their respective fields, their output power generally shows a rapid decline [4]. At the same time, the transmission loss of planar waveguides (such as microstrip lines, coplanar waveguides, strip lines, dielectric integrated waveguides, rectangular metal and rectangular dielectric waveguides, etc.)…”

Section: Introductionmentioning

confidence: 99%

Broadband Single-Mode Hollow Substrate Integrated Waveguide with Photonic Crystal Sidewalls for Multilayer System-in-Package Applications

Hong

Qiu

Sun

et al. 2021

2021 Research, Invention, and Innovation Congress: Innovation Electricals and Electronics (RI2C)

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We numerically and experimentally demonstrate a broadband single-mode hollow substrate integrated waveguide using one-dimensional photonic crystal as sidewalls in place of metallic via holes. By avoiding the vertical metallic walls, the waveguide can be easily fabricated as a photonic crystal structure on a single planar substrate sandwiched between two parallel metal plates. Such a hybrid flat waveguide can tightly confine the millimeter and terahertz waves in the low-loss air core. With the aid of the photonic crystal sidewalls, high-order competing modes in the waveguide are substantially suppressed based on the so-called modal-filtering effect, allowing the waveguide to be operated in a single-HE01-mode pattern over an octave bandwidth. Benefiting from the less use of metallic walls, the propagation loss of the proposed hybrid waveguide can be less than that of the classic hollow metallic rectangular waveguide at millimeter-wave and terahertz frequencies according to our numerical simulation. A proof-ofconcept experimental demonstration operating between 20 to 45 GHz is presented verifying the properties and the advantages of the proposed waveguide. This works offers a promising candidate for an octave-bandwidth single-mode transmission line for millimeter-wave and THz multilayer system-in-package applications.

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Section: Introductionmentioning

confidence: 99%

Broadband Single-Mode Hollow Substrate Integrated Waveguide with Photonic Crystal Sidewalls for Multilayer System-in-Package Applications

Hong

Qiu

Sun

et al. 2021

2021 Research, Invention, and Innovation Congress: Innovation Electricals and Electronics (RI2C)

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“…A preliminary version of this paper has been presented at the 2017 40th International Conference on Telecommunications and Signal Processing (TSP). 19 In this paper, powers and e±ciencies are not normalized and the real values are given in the respective tables and the¯gures.…”

Section: Introductionmentioning

confidence: 99%

Comparative Efficiency and Power Assessment of Optical Photoconductive Material-Based Terahertz Sources for Wireless Communication Systems

Yazgan

Jofre

Romeu

2018

J CIRCUIT SYST COMP

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Terahertz band has recently attracted the attention of the communication society due to its huge bandwidth and very high-speed wireless communications capability. It has been utilized in a variety of disciplines including physics, biology and astronomy for years; and the main concerns have always been obtaining highly efficient and high-power terahertz sources. Today, these problems are still the most important issues in establishing an operable wireless terahertz communication link. In this paper, recent studies in the field of terahertz source design are investigated based on the terahertz output power and efficiency. Solid-state sources and optical sources were comparatively reviewed with optical photoconductive material (OPM)-based methods which are combined with the terahertz antennas in the design phase generally. For wireless communication, the most suitable frequencies are between 0.3[Formula: see text]THz and 1[Formula: see text]THz due to the attenuation profile of the atmosphere. For this reason, based on the recently published studies, it has been observed that OPM and resonant tunneling diode-based sources are the most promising terahertz sources in terms of efficiency and power. Key issues and the main problems of terahertz photoconductive antennas which are the base of OPM method were also discussed in this paper.

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