Microresonator Frequency Reference for Terahertz Precision Sensing and Metrology

Gandhi, Rishabh; Leonhardt, R.; Vogt, Dominik Walter

doi:10.1109/tthz.2021.3119964

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…[1][2][3][4] As a result, using resonators with higher quality factor and larger coupling spectrum width has been demonstrated as effect approach to improve the accuracy and range of THz sensors. [5][6][7][8][9][10][11][12] In past years, on-chip THz resonator and waveguide are widely used in the field of sensing and communication. 9,10,[13][14][15] With an increase interest in developing integrated THz devices and circuits, there is a compelling need for ultracompact on-chip THz resonators with high-quality factor and large coupling spectrum width.…”

Section: Introductionmentioning

confidence: 99%

“…As one of the most important components in THz sensors, THz resonators with high‐quality factor can prolong the life of photons, leading to a significantly enhance of light‐matter interaction 1–4 . As a result, using resonators with higher quality factor and larger coupling spectrum width has been demonstrated as effect approach to improve the accuracy and range of THz sensors 5–12 . In past years, on‐chip THz resonator and waveguide are widely used in the field of sensing and communication 9,10,13–15 .…”

Section: Introductionmentioning

confidence: 99%

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On‐chip terahertz whispering gallery mode resonator with high‐Q based on multislot waveguide

Zhou

Xin

et al. 2023

Micro & Optical Tech Letters

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A whispering gallery mode resonator (WGMR) with a high‐quality factor and large coupling spectrum width can enhance the interaction of matter and lightwave by several orders of magnitude in a large bandwidth range. The performance of the resonator determines the accuracy and range of terahertz (THz) sensing. However, the quality factors of the reported THz WGMRs are highly limited by the high absorption loss of materials within THz spectral range. The coupling spectrum width is usually limited by the coupling structure. In this paper, an on‐chip THz whispering gallery mode resonator based on multislot waveguide and gradual coupling structure is proposed. By increasing the evanescent field of guided wave mode, the absorption loss in the resonator is significantly reduced. Through gradual coupling structure, resonance curves are more uniform within a wide spectrum. The simulation results show that the structure can improve the instinct quality factor of the THz resonator to the order of 1 0 4 $1{0}^{4}$ when the bending radius is as small as 2mm. At the same time, sensitivity is increased by more than six times and uniform resonance curves are achieved from 0.45 ~ 0.55 $0.45\unicode{x0007E}0.55$THz.

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