Optical hydrogen sensing with metallic photonic crystals and plasmonic metamaterials

Gießen, Harald; Mai, Patrick; Tittl, Andreas; Liu, Na; Grossmann, Cornelius; Seidel, Andreas; Orzekowsky, Regina; Meyrath, Todd P.

doi:10.1109/icsens.2010.5690585

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Considering that many factors affect the absorption rate, researchers took advantage of this property to develop sensors based on metamaterial absorbers. Giessen et al [25] were the first to use a single-band absorber to sense different concentrations of hydrogen. Later, more sensors for different purposes were proposed, such as sensing temperature [26][27][28], material thickness [29][30][31], and material refractive index [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Graphene metasurface for broadband absorption and terahertz sensing

Ren

Zhao

et al. 2023

Phys. Scr.

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A plasmon-induced terahertz metamaterial absorber is proposed. The bottom ground layer uses gold to block the transmission of terahertz incident waves, and the pattern layer and the ground layer are separated by topas. The 90% absorption bandwidth frequency range of the absorber is 4.6-7.7THz, and the average absorption rate in this range is 97.6%. Due to the geometric symmetry of the absorber, it has polarization insensitivity. In addition, when the incidence Angle reaches 60 degrees, more than 80% absorption can still be maintained. The numerical simulation shows that the frequency shift of the absorber has a good linear relationship with the change of the refractive index of the proposed absorber, and the sensitivity is 1100GHz per refractive index unit (GHz/RIU). Therefore, the absorber can be used in more complex electromagnetic scenarios, or as a sensing element.

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Section: Introductionmentioning

confidence: 99%

Graphene metasurface for broadband absorption and terahertz sensing

Ren

Zhao

et al. 2023

Phys. Scr.

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Inter-Cavity Coupling Strength Control in Metal/Insulator Multilayers for Hydrogen Sensing

Caligiuri

Luca

2021

Photonics

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Hydrogen (H2) sensing is crucial for modern energy storage technology, which looks to hydrogen as the most promising alternative to fossil fuels. In this respect, magnesium (Mg) offers unique possibilities, since magnesium and hydrogen easily undergo a reversible hydrogenation reaction where Mg reversibly converts into MgH2. From an optical point of view, this process produces an abrupt refractive index change, which can be exploited for sensing applications. To maximize this opportunity, we envision an architecture composed of two Ag/ITO/Mg metal/dielectric resonators facing each other and displaced by 200 nm of vacuum. This structure forms a so-called Epsilon-Near-Zero (ENZ) multi-cavity resonator, in which the two internal Mg layers, used as tunneling coupling metals, are accessible to environmental agents. We demonstrate that the hydrogenation of the two Mg layers leads to substantial changes in the strong coupling between the cavities composing the entire resonator, with a consequent abrupt modification of the spectral response, thus enabling the sensing mechanism. One of the main advantages of the proposed system with respect to previous research is that the proposed multilayered architecture avoids the need for lithographic processes. This feature makes the proposed architecture inexpensive and wafer-to-chip scalable, considering that each kind of substrate from common glass to silicon can be used. Therefore, our sensing architecture offers great promise for applications in embedded H2 sensors.

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Optical hydrogen sensing with metallic photonic crystals and plasmonic metamaterials

Cited by 2 publications

References 3 publications

Graphene metasurface for broadband absorption and terahertz sensing

Graphene metasurface for broadband absorption and terahertz sensing

Inter-Cavity Coupling Strength Control in Metal/Insulator Multilayers for Hydrogen Sensing

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