One-dimensional binary photonic crystals of graphene sheets embedded in dielectrics

Simple, efficient and accurate method toward the monitoring of ethyl butanoate traces

“…Therefore, the TMM method is a simple and efficient method to describe the response of the incident waves through periodic structures like 1D PCs (Abadla et al 2021 ; Peng et al 2017 ; Chen et al 2019a ; Razi and Ghasemi 2019 ; Aly and Elsayed 2012 ; Ramanujam et al 2020 ; Born and Wolf 1999 ). Hereinafter, we have considered y as the direction of propagation for the incident EM waves.…”

“…PCs present a new class of periodic structures in which the periodicity of refractive index among one, two, or three dimensions plays the main role in many promising applications (Mehaney et al 2021 ; Abadla et al 2021 , 2020a ; Zhang and Lv 2020 ). Whilst PCs could be designed or fabricated due to the sticking of two materials at least with different optical characteristics (Peng et al 2017 ; Chen et al 2019a ).…”

A 1D binary photonic crystal sensor for detecting fat concentrations in commercial milk

“…29,30 The spectral width of the PBG depends on some structural parameters of the PC such as the thicknesses and spatial refractive indices of the PC constituents. [31][32][33] For sensing applications, however, the structure of the PC has to be modied as the wide PBG is not suitable for sensing purposes. Introducing a defect layer in the PC structure will produce a resonant optical mode in the transmittance spectrum of the PC.…”

“…[38][39][40][41] Since the PC structure consists of a nite number of alternating layers, the transfer matric method (TMM) is widely used in calculating numerically the transmittance spectrum of the PC. 31,33,42 In this work, a 1D defective photonic crystal sensor structure is proposed to detect the fat volume concentrations in commercial milk. An empirical relation is developed to estimate the fat volume concentrations in commercial milk as a function of the refractive index.…”

“… 38–41 Since the PC structure consists of a finite number of alternating layers, the transfer matric method (TMM) is widely used in calculating numerically the transmittance spectrum of the PC. 31,33,42 …”