Mid-infrared chalcogenide slot waveguide plasmonic resonator sensor embedded with Au nanorods for surface-enhanced infrared absorption spectroscopy

Pi, Mingquan; Zhao, Huan; Li, Chunguang; Min, Yuting; Peng, Zhimin; Ji, Jialin; Huang, Yijun; Song, Fang; Liang, Lei; Wang, Yiding; Tittel, Frank K.; Zheng, Chuantao

doi:10.1016/j.rinp.2022.106005

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…Waveguide gas sensors, with low power consumption and small size, have become a hot topic in the field of gas sensors. [14][15][16][17][18][19] For instance, Marek Vlk et al enabled the realization of mid-infrared ethylene (C 2 H 2 ) sensors with a LoD as low as 7 ppm using a compact 2 cm optical path length. 20 Improving the performances of waveguide gas sensors relies on two key factors.…”

Section: Introductionmentioning

confidence: 99%

“…However, gas sensors based on discrete devices tend to have a larger size, higher power consumption and are more susceptible to external environmental interference. Waveguide gas sensors, with low power consumption and small size, have become a hot topic in the field of gas sensors 14–19 . For instance, Marek Vlk et al enabled the realization of mid‐infrared ethylene (C 2 H 2 ) sensors with a LoD as low as 7 ppm using a compact 2 cm optical path length 20 .…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental investigation of chalcogenide suspended waveguide gas sensor

Huang,

Wang,

et al. 2023

Micro & Optical Tech Letters

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To address the issues of low ratio of evanescent field (γ) and high reflectivity between waveguide cross‐section and gas for the mid‐infrared waveguide sensors, we propose a chalcogenide (ChG) suspended waveguide with Ge28Sb12Se60 as the core layer and silica (SiO2) as the buffer layer. The SiO2 beneath the waveguide core ridge structure is removed to create suspended structure. The waveguide sensing performance is obtained using a 10% methane (CH4) sample. The fabricated waveguide exhibits a γ of 112%, which is a 10% improvement compared to a free‐space optical sensor with the same optical path length. The good agreement between the theoretical and experimental results of γ confirms the reliability of our theoretical investigation approach. The influences of fabrication error, environmental temperature, and pressure on sensing performances are discussed. This work provides theoretical guidance for designing waveguide structures with large γ, contributing to the further enhancement of on‐chip sensor performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental investigation of chalcogenide suspended waveguide gas sensor

Huang,

Wang,

et al. 2023

Micro & Optical Tech Letters

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Aperture coupled elliptic patch nanoantenna for low‐cost interchip/intrachip optical‐wireless communication

Sangeeta,

Samuvel

2024

Int J Communication

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SummaryThis research proposes a novel low‐cost aperture coupled elliptic patch nanoantenna which works best when it has a stable radiation pattern and good gain. On the upper portion of the substratum, a cross‐shaped hole was additionally engraved from a metallic strip with a silver composition. Elliptical‐shaped silicon material is employed as a patch in this antenna design which is made on a substrate made of inexpensive glass epoxy. The silver substance makes up the nanometallic strip line at the substrate's base. A cross‐shaped hole has also been etched from a metallic strip with a silver composition on the upper section of the substrate. As the foam substrate to be used in between the feed and antenna substrates, Rohacell was adopted. A proposed simple cross‐shaped aperture enhanced the bandwidth of the planned antenna without degrading its radiation performance and is loaded on a proximity‐linked elliptical microstrip antenna. To achieve the highest coupling, the lowest back radiation, the least amount of spurious radiation, and good efficiency, the patch and feed line are positioned in the middle, at a right angle over the slot. The proposed antenna was simulated in HFSS, and optimum results were observed from the output. The results were evaluated based on radiation pattern, return loss, smith chart, radiation efficiency, and 3D polar plot for 300, 500, and 800 THz frequencies. Also, the impedance bandwidth, gain, and a number of bands were compared with other conventional methods and our proposed method proved to outperform the existing method in all aspects.

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Broadband Long‐Wave Infrared On‐Chip Silicon‐based Surface‐Enhanced Laser Spectroscopy Enabled by Gradient Nanoantenna Array

An,

Liu,

Tang

et al. 2024

Laser & Photonics Reviews

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Silicon‐based on‐chip broadband surface‐enhanced infrared absorption (SEIRA) is highly desired for integrated micromolecular detection systems, taking advantages of CMOS mass production, low cost, high sensitivity, etc. However, the silicon platform is difficult to operate in the mid‐infrared wavelength region above 4 µm where abundant fingerprint characteristics of biomolecules are located, because of the strong absorptions in silicon dioxide cladding above 4 µm. Here, a large‐core rib silicon waveguide‐integrated gradient nanoantenna array is proposed for broadband long‐wave infrared biomolecular detection. It is shown that Low loss propagation of light in the long‐wave infrared region up to 7 µm (1428 cm−1) in silicon photonics can be achieved while avoiding complex fabrication techniques. A gradient nanoantenna array is designed on the waveguide to achieve broadband enhancement from 5 to 7 µm (1428–2000 cm−1). Laser spectroscopy of bovine serum albumin on the chip is demonstrated, showing enhancement of absorbance by approximately ten times over laser transmission spectroscopy in the amide bands. Such a platform opens up a new horizon of silicon‐based on‐chip SEIRA biomolecular detection.

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Mid-infrared chalcogenide slot waveguide plasmonic resonator sensor embedded with Au nanorods for surface-enhanced infrared absorption spectroscopy

Cited by 5 publications

References 31 publications

Theoretical and experimental investigation of chalcogenide suspended waveguide gas sensor

Theoretical and experimental investigation of chalcogenide suspended waveguide gas sensor

Aperture coupled elliptic patch nanoantenna for low‐cost interchip/intrachip optical‐wireless communication

Broadband Long‐Wave Infrared On‐Chip Silicon‐based Surface‐Enhanced Laser Spectroscopy Enabled by Gradient Nanoantenna Array

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