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Author

Yosuke Nishida

Bio: Yosuke Nishida is an academic researcher from Rohm. The author has contributed to research in topics: Terahertz radiation & Resonant-tunneling diode. The author has an hindex of 1, co-authored 5 publications receiving 2 citations.

Papers
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Proceedings ArticleDOI
01 Sep 2020
TL;DR: In this article, two types of practical plastic packages are proposed for practical terahertz applications by using a plastic leaded chip carrier (PLCC), and also by embedding a parabolic antenna.
Abstract: The two types of practical plastic packages are proposed in this study for practical terahertz applications by using a plastic leaded chip carrier (PLCC), and also by embedding a parabolic antenna. A resonant tunneling diode (RTD) oscillator onto the top surface of which a dipole antenna is integrated is mounted in the packages to measure the radiation characteristics. The antenna gain is improved by 5 dB for the PLCC, while 17 dB for the parabolic-antenna type, compared to that of the RTD bare chip. The team also fabricates terahertz-imaging modules by utilizing PLCC-packaged RTD's as an oscillator and a detector. A perspective image obtained by line-scan with 1.25-mm pixel pitch elucidates the usefulness of the package.

10 citations

Proceedings ArticleDOI
29 Aug 2021
TL;DR: In this paper, a new method of packaging an active device using the dielectric waveguide interface is proposed, which offers an easy fabrication and lower insertion loss at THz frequencies, compared with the conventional metallic waveguide approach.
Abstract: Hollow-waveguide-packaging technologies for terahertz (THz) electronic devices and integrated circuits are crucial for practical applications. In this study, a new method of packaging an active device using the dielectric waveguide interface is proposed, which offers an easy fabrication and lower insertion loss at THz frequencies, compared with the conventional metallic waveguide approach. We employ a photonic crystal waveguide as a dielectric transmission line, and apply the proposed packaging technique to a resonant tunneling diode (RTD). Using packaged RTD module, we demonstrate 17-Gbit/s error-free wireless communication in the 300-GHz-band.

3 citations

Proceedings ArticleDOI
29 Aug 2021
TL;DR: In this paper, a center-fed slot-antenna resonant tunneling diode (RTD) chip that is backside-coupled to a photonic crystal waveguide is introduced.
Abstract: The incorporation of active components to micro scale photonic devices is beneficial to building fully integrated systems in the terahertz region. In this work we introduce a center-fed slot-antenna resonant tunneling diode (RTD) chip that is backside-coupled to a photonic crystal waveguide. Experiments revealed stable oscillation at 346 GHz and efficient coupling.

2 citations

Proceedings ArticleDOI
24 Nov 2020
TL;DR: In this article, a resonant tunneling diode (RTD) is employed as both a source and a detector for terahertz (THz) sensing applications.
Abstract: A resonant tunneling diode (RTD) is a promising device for future terahertz (THz) applications owing to its capacity to operate as both a transmitter and a receiver of THz waves. It is noteworthy that the RTD can simultaneously detect incoming terahertz signals while operating as an oscillator. In this study, we investigated the possibility of employing a single RTD transceiver module as both a source and a detector in THz sensing applications. Such a configuration can greatly simplify THz imaging systems while maintaining excellent phase stability owing to the injection locking phenomenon. The developed imaging system identifies small deformation with a dimension of approximately 0.1 mm from a distance of ~70 cm. Finally, two-dimensional imaging of 0.3-mm-thick tape was successfully demonstrated.

2 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article , the authors reevaluate the evolution stages of the terahertz (THz) integrated circuits and systems based on all-Si waveguides, and propose an efficient interconnect for THz integrated circuits.
Abstract: Abstract Recent advances in silicon (Si) microphotonics have enabled novel devices for the terahertz (THz) range based on dielectric waveguides. In the past couple of years, dielectric waveguides have become commonplace for THz systems to mitigate issues in efficiency, size, and cost of integration and packaging using metal-based waveguides. Therefore, THz systems have progressively evolved from cumbersome collections of discreet components to THz-wave integrated circuits. This gradual transition of THz systems from numerous components to compact integrated circuits has been facilitated at each step by incredible advances in all-Si waveguides allowing low-loss, low dispersion, and single-mode waveguiding operation. As such, all-Si waveguides position themselves as highly efficient interconnects to realize THz integrated circuits and further large-scale integration in the THz range. This review article intends to reevaluate the evolution stages of THz integrated circuits and systems based on all-Si waveguides.

27 citations

Journal ArticleDOI
TL;DR: This article provides a review of the state of the art, with a focus on the THz RTD oscillator, which is the key component of RTD-based THz transmitters and coherent receivers, and highlights the potential of the technology for future short-range communications.
Abstract: Resonant tunneling diode (RTD) technology is emerging as one of the promising semiconductor-based solid-state technologies for terahertz (THz) wireless communications. This article provides a review of the state of the art, with a focus on the THz RTD oscillator, which is the key component of RTD-based THz transmitters and coherent receivers. A brief summary on the device principle of operation, technology, modeling, as well as an overview of oscillator design and implementation approaches for THz emitters, is provided. A new insight to device evaluation and to the reported oscillator performance levels is also given, together with brief remarks on RTD-based THz detectors. Thereafter, an overview of the reported wireless links which utilize an RTD in either transmission or reception, or in both roles, is given. Highlight results include the record single-channel wireless data rate of 56 Gb/s employing an all RTD-based transceiver, which demonstrates the potential of the technology for future short-range communications. The article concludes with a discussion of the current technical challenges and possible strategies for future progress.

19 citations

Proceedings Article
01 Jan 2005
TL;DR: The terahertz region of the electromagnetic spectrum, spanning from 100 GHz through 10 THz, is of increasing importance for a wide range of scientific, military and commercial applications.
Abstract: The terahertz region of the electromagnetic spectrum, spanning from 100 GHz through 10 THz, is of increasing importance for a wide range of scientific, military and commercial applications. This interest is spurred by the unique properties of this spectral band and the very recent development of convenient terahertz sources and detectors. However, the terahertz band is also extremely challenging, in large part because it spans the transition from traditional electronics to photonics. This paper reviews the importance of this frequency band and summarizes the efforts of scientists and engineers to span the terahertz technology gap. The emphasis is on solid-state circuits that use nonlinear diodes to translate the functionality of microwave technology to much higher frequencies.

15 citations

Journal ArticleDOI
TL;DR: In this paper , the authors present a brief outlook of various terahertz functional devices enabled by a photonic topological insulator that will pave the path for augmentation of complementary metal oxide semiconductor compatible TRS technologies, essential for accelerating the vision of 6G communication and beyond.
Abstract: The development of terahertz integrated circuits is vital for realizing sixth-generation (6G) wireless communication, high-speed on-chip interconnects, high-resolution imaging, on-chip biosensors, and fingerprint chemical detection. Nonetheless, the existing terahertz on-chip devices suffer from reflection, and scattering losses at sharp bends or defects. Recently discovered topological phases of light endow the photonics devices with extraordinary properties, such as reflectionless propagation and robustness against impurities or defects, which is vital for terahertz integrated devices. Leveraging the robustness of topological edge states combined with a low-loss silicon platform is poised to offer a remarkable performance of the terahertz devices providing a breakthrough in the field of terahertz integrated circuits and high-speed interconnects. In this Perspective, we present a brief outlook of various terahertz functional devices enabled by a photonic topological insulator that will pave the path for augmentation of complementary metal oxide semiconductor compatible terahertz technologies, essential for accelerating the vision of 6G communication and beyond to enable ubiquitous connectivity and massive digital cloning of physical and biological worlds.

15 citations

Peer ReviewDOI
TL;DR: It is demonstrated that RTD technology is a very promising candidate to realize compact, low-cost THz imaging systems based on the emerging resonant tunneling diode (RTD) devices.
Abstract: Terahertz (THz) imaging is a rapidly growing application motivated by industrial demands including harmless (non-ionizing) security imaging, multilayer paint quality control within the automotive industry, insulating foam non-invasive testing in aerospace, and biomedical diagnostics. One of the key components in the imaging system is the source and detector. This paper gives a brief overview of room temperature THz transceiver technology for imaging applications based on the emerging resonant tunneling diode (RTD) devices. The reported results demonstrate that RTD technology is a very promising candidate to realize compact, low-cost THz imaging systems.

7 citations