Terahertz integrated device: high-Q silicon dielectric resonators

Xie, Jingya; Zhu, Xi; Zang, Xiaofei; Cheng, Qingqing; Chen, Lin; Zhu, Yiming

doi:10.1364/ome.8.000050

Cited by 40 publications

(30 citation statements)

References 32 publications

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“…Although it promises the required selectivity and quantification, its shortcoming is the present Technology Readiness Level (TRL) restricting access to specialized laboratories. The integration of THz waveguides [42] and resonators [43] using silicon-based fabrication processes presents a longer-term perspective to construct a sensor operating on this principle that can be placed inside the package.…”

Section: Resultsmentioning

confidence: 99%

Monitoring of food spoilage by high resolution THz analysis

Hindle

Kuuliala

Mouelhi

et al. 2018

Analyst

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High resolution rotational Terahertz (THz) spectroscopy has been widely applied to the studies of numerous polar gas phase molecules, in particular volatile organic compounds (VOCs). During the storage of foodstuffs packed under a protective atmosphere, microbial activity will lead to the generation of a complex mixture of trace gases that could be used as food spoilage indicators. Here we have demonstrated that the THz instrumentation presently available provides sufficient sensitivity and selectivity to monitor the generation of hydrogen sulfide (H2S) in the headspace of packed Atlantic salmon (Salmo salar) fillet portions. A comprehensive comparison was made by selective-ion flow-tube mass spectrometry (SIFT-MS) in order to validate the THz measurements and protocol. The detectivity of a range of alternative compounds for this application is also provided, based on the experimental detection limit observed and molecular spectroscopic properties. Molecules like ethanol, methyl mercaptan and ammonia are suitable indicators with the presently available sensitivity levels, while dimethyl sulfide, acetone and butanone may be considered with a sensitivity improvement of 2 orders of magnitude.

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Section: Resultsmentioning

confidence: 99%

Monitoring of food spoilage by high resolution THz analysis

Hindle

Kuuliala

Mouelhi

et al. 2018

Analyst

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“…Therefore, a silicon platform is suitable for THz circuits to achieve simplicity and efficiency [ 139 ]. In addition to the THz silicon waveguides [ 62 , 63 , 140 , 141 , 142 , 143 ], many other passive functionalities for THz waves have been realized, such as high-Q silicon cavities [ 61 , 64 , 144 , 145 , 146 ], antennas [ 59 , 60 ], time-domain signal processing [ 147 ], and so on. To further reduce the waveguide loss, various waveguide structures are designed (see Figure 10 a).…”

Section: Silicon Photonics For Thz Techniquesmentioning

confidence: 99%

“…The high-Q cavities are fundamental to the implementation of compact sensors and filters [ 151 ]. As shown in Figure 10 b, all-silicon THz cavities with Q as high as 2839 and 1020 have been realized [ 61 , 64 ]. Based on this, several tunable devices have been realized so far, such as thermal tuning of silicon THz whispering-gallery-mode resonators [ 152 , 153 ].…”

Section: Silicon Photonics For Thz Techniquesmentioning

confidence: 99%

A Review on Terahertz Technologies Accelerated by Silicon Photonics

Xie

Zhou

et al. 2021

Nanomaterials

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In the last couple of decades, terahertz (THz) technologies, which lie in the frequency gap between the infrared and microwaves, have been greatly enhanced and investigated due to possible opportunities in a plethora of THz applications, such as imaging, security, and wireless communications. Photonics has led the way to the generation, modulation, and detection of THz waves such as the photomixing technique. In tandem with these investigations, researchers have been exploring ways to use silicon photonics technologies for THz applications to leverage the cost-effective large-scale fabrication and integration opportunities that it would enable. Although silicon photonics has enabled the implementation of a large number of optical components for practical use, for THz integrated systems, we still face several challenges associated with high-quality hybrid silicon lasers, conversion efficiency, device integration, and fabrication. This paper provides an overview of recent progress in THz technologies based on silicon photonics or hybrid silicon photonics, including THz generation, detection, phase modulation, intensity modulation, and passive components. As silicon-based electronic and photonic circuits are further approaching THz frequencies, one single chip with electronics, photonics, and THz functions seems inevitable, resulting in the ultimate dream of a THz electronic–photonic integrated circuit.

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“…High‐ Q of about 2850 at 218.345 GHz was achieved due to the excitation of the WGM on waveguide‐coupled single‐mode racetrack rings and disk cavities. These high‐ Q resonators are useful for ultrahigh sensitive on‐chip terahertz sensors …”

Section: Whispering Gallery Modesmentioning

confidence: 99%

Whispering Gallery Modes at THz

Prabhu

Achanta

2019

Advanced Optical Materials

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Whispering gallery modes (WGM) offer strong confinement of electromagnetic radiation to specific resonances supported by the geometry of the resonator. In fact, highest ever quality factors are reported in optical and near‐infrared WGMs along with their applications. Terahertz (THz) radiation offers a unique spectroscopic window to probe materials and has applications in security, sensing, and telecommunication. WGMs at THz have untapped potential for light–matter interaction studies and wide‐ranging applications. In this review, an educational overview of WGMs is given, followed by a review of the THz WGMs and their applications.

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Terahertz integrated device: high-Q silicon dielectric resonators

Cited by 40 publications

References 32 publications

Monitoring of food spoilage by high resolution THz analysis

Monitoring of food spoilage by high resolution THz analysis

A Review on Terahertz Technologies Accelerated by Silicon Photonics

Whispering Gallery Modes at THz

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