Abstract
In this paper, we theoretically propose a novel magnetic field-dependent sensor using omnidirectional magnetized cold plasma photonic crystal in one dimension for TE polarization. The structure consists of asymmetric two periodic arrays from magnetized cold plasma and sample cavity layer. Between the periodic arrays, a sample cavity is sandwiched between two quartz layers. The methodology of the proposed detector depends on the appearance of a sensitive defect mode. The results clear that the defect mode frequency depends significantly on the refractive index of the sample, and it is extremely sensitive to incident angle changes, applied magnetic field, the number density of electrons, and sample layer thickness. The optimized proposed sensor has high sensitivity of 15.14 GHz/RIU, quality-factor of 527.32, and figure of merit of 1066.20 RIU−1, where RIU means refractive index unit. So, the proposed sensor can aid in solving many challenges in chemical and environmental applications.
Highlights
Photonic crystal (PC) is an optical structure of alternative materials with high and low refractive indices (Yablonovitch 2001; Yablonovitch and Gmitter 1989; Zaky and Aly 2021a; John 1987; Ayyub et al 2013; Kushwaha et al 2018)
Such forbidden frequency region is known as photonic bandgap (PBG) (Bikbaev et al 2017; Zaky et al 2021a; Aghajamali 2016; Zaky and Aly 2021b; Armstrong and O’Dwyer 2015; Afsari and Sarraf 2020; Abd El-Ghany et al 2020)
We propose a 1D-PC multilayered structure with Magnetized cold plasma (MCP) for gas sensing application
Summary
Photonic crystal (PC) is an optical structure of alternative materials with high and low refractive indices (Yablonovitch 2001; Yablonovitch and Gmitter 1989; Zaky and Aly 2021a; John 1987; Ayyub et al 2013; Kushwaha et al 2018). The periodicity of the refractive index causes forbidden frequency or wavelength region for photons that make it not allowed to propagate through the structure (John and Florescu 2001; Zaky et al 2020; Tammam et al 2021; Auguié et al 2014; Boopathi et al 2018; Panda and Devi 2020). Such forbidden frequency region is known as photonic bandgap (PBG) (Bikbaev et al 2017; Zaky et al 2021a; Aghajamali 2016; Zaky and Aly 2021b; Armstrong and O’Dwyer 2015; Afsari and Sarraf 2020; Abd El-Ghany et al 2020). The defect layer as well as one of the regular layers are taken as a gas sample to detect the gas with the respective wavelength of the resonant mode
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