Surface Plasmon Resonance Waveguide Sensor in the Terahertz Regime

Shibayama, Jun; Shimizu, Kazuya; Yamauchi, Junji; Nakano, Hisamatsu

doi:10.1109/jlt.2016.2539974

Cited by 37 publications

(28 citation statements)

References 40 publications

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“…As can be seen, the dip shifts toward a larger frequency as T increases, indicating that the variations of temperature can be monitored by measuring the shift of the valley frequency. The estimated sensitivity is 8.9 × 10 -3 THz/K, which are comparable to that of 7.5 × 10 -3 THz/K achieved in [25], but six times improved than that reported in [23] (1.425 × 10 -3 THz/K). The structure offers an improved sensing performance.…”

Section: Resultssupporting

confidence: 64%

“…To function as a good interferometer, both arms of the MZI should be single mode waveguides, which is different from that in [25], where the structure was designed as a multimode waveguide (mode orders m = 0, 1 are supported). It is evident that the sensing arm supports one SPP1 mode only.…”

Section: Resultsmentioning

confidence: 99%

“…In this work, we would like to point out that the sensing scheme in [25] could be realized using another novel method, i.e. the Mach-Zehnder (MZ) interferometry.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mach–Zehnder Interferometer-Based Integrated Terahertz Temperature Sensor

Nguyen-Huu

Zhou

et al. 2017

IEEE J. Select. Topics Quantum Electron.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 99%

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Mach–Zehnder Interferometer-Based Integrated Terahertz Temperature Sensor

Nguyen-Huu

Zhou

et al. 2017

IEEE J. Select. Topics Quantum Electron.

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“…24 and comparable to that of 7.5 × 10 −3 THz/K achieved in ref. 39. The shift of the peak frequency is caused by the variation of real ( ε InSb ) induced by the temperature.…”

Section: Resultsmentioning

confidence: 99%

Subwavelength InSb-based Slot wavguides for THz transport: concept and practical implementations

Zhou

Pištora

et al. 2016

Sci Rep

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Seeking better surface plasmon polariton (SPP) waveguides is of critical importance to construct the frequency-agile terahertz (THz) front-end circuits. We propose and investigate here a new class of semiconductor-based slot plasmonic waveguides for subwavelength THz transport. Optimizations of the key geometrical parameters demonstrate its better guiding properties for simultaneous realization of long propagation lengths (up to several millimeters) and ultra-tight mode confinement (~λ2/530) in the THz spectral range. The feasibility of the waveguide for compact THz components is also studied to lay the foundations for its practical implementations. Importantly, the waveguide is compatible with the current complementary metal-oxide-semiconductor (CMOS) fabrication technique. We believe the proposed waveguide configuration could offer a potential for developing a CMOS plasmonic platform and can be designed into various components for future integrated THz circuits (ITCs).

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“…In what follows we assume that one dielectric is lossless > 0, while another is a high-k lossy dielectric = + , where, additionally, ≫ . One can then directly use the expressions for the modal effective refractive index (17) and modal extents into the dielectric materials (Equation (19), while choosing the signs of the transverse wavevectors in both media to satisfy the surfacebounded wave condition (Equation (18). Resultant expressions can be further simplified in the limit ≪ , which is the case for most high-k dielectrics to obtain the following expressions for the modal propagation distance (limited by material losses), and modal extents into the two dielectrics:…”

Section: Lossy High-k Dielectricsmentioning

confidence: 99%

Surface Wave Enhanced Sensing in the Terahertz Spectral Range: Modalities, Materials, and Perspectives

Poulin

Giannacopoulos

Skorobogatiy

2019

Sensors

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The terahertz spectral range (frequencies of 0.1-10 THz) has recently emerged as the next frontier in non-destructive imaging and sensing. Here, we review amplitude-based and phase-based sensing modalities in the context of the surface wave enhanced sensing in the terahertz frequency band. A variety of surface waves are considered including surface plasmon polaritons on metals, semiconductors, and zero gap materials, surface phonon polaritons on polaritonic materials, Zenneck waves on high-k dielectrics, as well as spoof surface plasmons and spoof Zenneck waves on structured interfaces. Special attention is paid to the trade-off between surface wave localization and sensor sensitivity. Furthermore, a detailed theoretical analysis of the surface wave optical properties as well as the sensitivity of sensors based on such waves is supplemented with many examples related to naturally occurring and artificial materials. We believe our review can be of interest to scientists pursuing research in novel high-performance sensor designs operating at frequencies beyond the visible/IR band. Keywords: terahertz band; surface waves; amplitude sensing modality; phase sensing modality; surface plasmon polaritons; surface phonon polaritons; Zenneck waves; spoof plasmons Recently, the THz spectral range (frequencies of 0.1-10 THz, wavelengths of 3 mm-30 µm) has emerged as the next frontier in non-destructive imaging and sensing. Key advantages when operating in the THz band are the ability to detect the complex electric field of THz waves (phase and amplitude), availability of both pulsed (sub-1 ps) and continuous wave (CW) THz systems, as well as ability of conducting dynamic measurements with sub-1 ms temporal resolution [6]. Additionally, relative transparency of dry dielectrics to THz radiation, strong absorption of THz waves by water and other polar solutions, as well as the non-ionizing nature of THz light enable many and more graphical than analytical, which is the main reason why we chose a more theoretically elegant approach for the characterization of sensor sensitivity with respect to changes in the analyte refractive index complemented by the study of the surface wave probing depth. Amplitude Sensing ModalityAmplitude sensing modality offers the simplest sensor implementation as it only requires monitoring of the sensor transmission amplitude. A simplified schematic of an amplitude-based sensor is presented in Figure 1. The amplitude sensing detection modality is mostly used to detect variations in the imaginary part of the analyte refractive index.Sensors 2020, 20, x FOR PEER REVIEW 3 of 24 theoretically elegant approach for the characterization of sensor sensitivity with respect to changes in the analyte refractive index complemented by the study of the surface wave probing depth. Amplitude Sensing ModalityAmplitude sensing modality offers the simplest sensor implementation as it only requires monitoring of the sensor transmission amplitude. A simplified schematic of an amplitude-based sensor is presented in Figure 1...

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Surface Plasmon Resonance Waveguide Sensor in the Terahertz Regime

Cited by 37 publications

References 40 publications

Mach–Zehnder Interferometer-Based Integrated Terahertz Temperature Sensor

Mach–Zehnder Interferometer-Based Integrated Terahertz Temperature Sensor

Subwavelength InSb-based Slot wavguides for THz transport: concept and practical implementations

Surface Wave Enhanced Sensing in the Terahertz Spectral Range: Modalities, Materials, and Perspectives

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