Ultrasensitive Tunable Terahertz Sensor With Graphene Plasmonic Grating

Yan, Fei; Li, Li; Wang, Ruoxing; Tian, Hao; Liu, Jianlong; Liu, Jianqiang; Tian, Fengjun; Zhang, Jianzhong

doi:10.1109/jlt.2018.2886412

Cited by 76 publications

(37 citation statements)

References 52 publications

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“…The sensitivity of a sensor is normally defined as S = f/ n, where f is the offset of resonance frequency, n is the change rate of refractive index n [23], and the ultra-high sensitivity of 1,800 GHz/RIU can be obtained for the presented sensor. Furthermore, the FOM value take absorption bandwidth into account but only offset of resonance frequency, it is a more commonly used parameter for better evaluation of the synthetical performance of a sensor and the calculation formula is defined as Fom = S/FWHM [29], where S is the sensitivity of the sensor. Obviously, for a certain S, the smaller the 3 dB bandwidth FWHM of the resonance frequency band is, the higher the FOM value can be achieved.…”

Section: Resultsmentioning

confidence: 99%

“…Excited by a linearly p-polarized plane incident wave (with electric component along the x direction), the absorption curve of the sensor without analyte is shown in Figure 2A, a perfect absorption peak at 5.95 THz is obtained. The full-width halfmaximum value (FWHM) of the absorption peak is 0.12 THz, the quality factor (Q-factor) equal to 49.6 which is defined as Q = f/FWHM, where f = 5.95 THz is the central resonance frequency and FWHM = 0.12 THz is the full-width at half-maximum [29].…”

Section: Structure Designmentioning

confidence: 99%

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Ultrasensitive THz Sensor Based on Centrosymmetric F-Shaped Metamaterial Resonators

Zhong

et al. 2020

Front. Phys.

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An ultra-high sensitive metamaterials absorption sensor based on centrosymmetric double F-shaped metal resonators (CDFMR) is proposed, and its application in terahertz is analyzed. The sensor achieved perfect narrow-band absorption spectrum at 5.92 THz, with a high Q factor of 49.6. The resonance frequency is sensitive to the refractive index of the surface analyte, ultra-high sensitivity of 1,800 GHz/RIU and Fom value of 15 have been achieved. In addition, with a typical biomedical analyte of n = 1.3, the thickness sensitivity is 134 GHz/µm. It has important application in THz ultrasensitive biomedical sensor and detector.

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Section: Resultsmentioning

confidence: 99%

Section: Structure Designmentioning

confidence: 99%

Ultrasensitive THz Sensor Based on Centrosymmetric F-Shaped Metamaterial Resonators

Zhong

et al. 2020

Front. Phys.

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“…Analogous to the prism coupler approach, these plasmonic grating structures have also been used for sensing and biosensing applications [41][42][43][44]. In telecommunications, their applications range from transmission lines to optical modulators [45][46][47][48][49][50].…”

Section: Plasmonic Resonances: Fundamentalsmentioning

confidence: 99%

Plasmonics for Telecommunications Applications

Carvalho

Mejía‐Salazar

2020

Sensors

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Plasmonic materials, when properly illuminated with visible or near-infrared wavelengths, exhibit unique and interesting features that can be exploited for tailoring and tuning the light radiation and propagation properties at nanoscale dimensions. A variety of plasmonic heterostructures have been demonstrated for optical-signal filtering, transmission, detection, transportation, and modulation. In this review, state-of-the-art plasmonic structures used for telecommunications applications are summarized. In doing so, we discuss their distinctive roles on multiple approaches including beam steering, guiding, filtering, modulation, switching, and detection, which are all of prime importance for the development of the sixth generation (6G) cellular networks.

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“…The purpose of implementing the THz absorbers is enabling the technology in spectroscopy 12 , detection and sensing 13 and many more 14 . Recently, the implementation of ultrathin 15 , ultrasensitive 8,13,16,17 absorption based sensors/biosensors with narrow 17,18 and ultra-narrowband 19,20 response is being investigated. The recent implementations discuss about the development of narrowband sensors with multi-layered media with complex structures having large thickness 17,20,21 .…”

Section: Introductionmentioning

confidence: 99%