Optical transmission properties of an anisotropic defect cavity in one-dimensional photonic crystal

Ouchani, N.; Moussaouy, A. El; Aynaou, H.; Hassouani, Y. El; Boudouti, El Houssaine El; Djafari‐Rouhani, Bahram

doi:10.1016/j.physleta.2017.11.020

Cited by 16 publications

(5 citation statements)

References 45 publications

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“…In this paper, we use the interface response theory of continuous media, a simple presentation of the Green function [24][25][26]. This technique is the most suitable for the treatment of composite systems containing several interfaces [27,28].…”

Section: Methodsmentioning

confidence: 99%

Numerical Investigation of Simultaneous Refractive index Sensor using 1D multichannel photonic crystal device

Bouzidi

Bria

El‐Khozondar

et al. 2020

Preprint

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We present a multichannel sensor for the simultaneous monitoring of three different samples. established from a one-dimensional photonic crystal, this device is formed by an alternating layer of silicon dioxide (SiO2) and titanium dioxide (TiO2) with three defect layers containing the samples to be monitored. Numerical studies claim that three transmission peaks appear in the bandgap, these transmission peaks are caused by the three samples infiltrated in the defect layers. In real-time detection purposes, it is possible to exploit these transmission peaks. In addition, peak frequencies have the advantage of being susceptible to sample concentrations. With this photonic structure, a sensitivity of 800 nm per unit of refractive index (RIU) is reached.

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Section: Methodsmentioning

confidence: 99%

Numerical Investigation of Simultaneous Refractive index Sensor using 1D multichannel photonic crystal device

Bouzidi

Bria

El‐Khozondar

et al. 2020

Preprint

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“…The lattice constant of the 1D AGPC structure is a = d g + d A . ε 0 and ε N + 1 are the relative permittivities of the input and output planes of the There are various methods for simulating the optical properties of 1D AGPC structure, including the plane wave expansion (PWE) [40], green function (GF) [41], finite difference time domain (FDTD) [42], finite element method (FEM) [43], the standard 2 × 2 transfer matrix method for isotropic layers [29], [44], and 4 × 4 transfer matrix method that is suitable for all anisotropic layers [45]. Since the thickness of a graphene monolayer is 0.34 nm, simulating the structures containing graphene by using all-numerical methods such as the FEM and FDTD is very time-consuming and requires high simulation facilities.…”

Section: Theoretical Model and Formulismmentioning

confidence: 99%

Tunable Terahertz Perfect Absorber and Polarizer Based on one-Dimensional Anisotropic Graphene Photonic Crystal

2022

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In this article, a new tunable absorber and polarizer using one-dimensional anisotropic graphene photonic crystal (1D AGPC) is proposed for terahertz applications. The optical properties of the 1D AGPC structure is obtained through the transfer matrix method (TMM) calculations. In our design, a single defect layer is introduced in the 1D AGPC structure to increase its absorption. The absorption coefficient is further modified by optimizing the AGPC parameters such as the number of photonic crystal periods, the defect layer thickness, and the chemical potential of graphene. The modified structure can provide perfect absorption with a narrow bandwidth of 0.05 THz. On the other hand, considering the anisotropic optical properties of graphene, polarization dependence of the absorption coefficient is investigated. This feature of the structure can be employed to realize a tunable terahertz polarizer by adjusting incident angle at θ 0 = 80°. In this way, high tunable polarization extinction ratio of 6.1 dB to 11.63 dB with respectively very narrow bandwidth of 0.031 THz to 0.023 THz are obtained. The maximum insertion losses within the tunable frequency range are as low as 0.023 dB and 0.031 dB. Hence, our design may have potential applications in narrow-band optoelectronic devices at the terahertz frequency range.

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“…Among these, the TMM has been exploited in most of the investigations owing to its simplicity and flexibility. Interestingly, TMM can be used in isotropic as well as anisotropic mediums including disordered configurations, wherein the defect modes can be introduced with less complexity [68,69].…”

Section: Analytical Treatmentmentioning

confidence: 99%

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF₂ Defect Layer

Pourmand

Choudhury

2020

IEEE Access

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Investigation of the spectral response of graphene-dielectric (SiO 2 )-based periodic structure was made in the far-infrared (IR) to the mid-IR frequency range, and the effects of different parametric and operational conditions on the transmission characteristics were explored. The presence of stop-bands, followed by Bragg reflection harmonics, in the low-frequency regime was observed exploiting the bilayer graphene (BLG) sheets. The width of stop-bands could be tuned by altering the number of periods as well as the chemical potential of BLG. The formation of a stop-band (with a transmission dip positioned at ~16 THz) having a span of ~3 THz was noticed, which is possibly a very large stop-bandwidth reported so far. The structure was also analyzed upon introducing a defect layer of MgF 2 having a thickness smaller than the dielectric medium. This results in shifting the position of stop-bands of the structure. The characteristics of transmission spectra were found to be greatly depending on the chemical potential (of BLG) and other operating conditionsthe feature that triggers the usefulness of the proposed structure in the design of optical modulators, tunable narrow-band filters and broad-band reflectors.

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Optical transmission properties of an anisotropic defect cavity in one-dimensional photonic crystal

Cited by 16 publications

References 45 publications

Numerical Investigation of Simultaneous Refractive index Sensor using 1D multichannel photonic crystal device

Numerical Investigation of Simultaneous Refractive index Sensor using 1D multichannel photonic crystal device

Tunable Terahertz Perfect Absorber and Polarizer Based on one-Dimensional Anisotropic Graphene Photonic Crystal

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF₂ Defect Layer

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Optical transmission properties of an anisotropic defect cavity in one-dimensional photonic crystal

Cited by 16 publications

References 45 publications

Numerical Investigation of Simultaneous Refractive index Sensor using 1D multichannel photonic crystal device

Numerical Investigation of Simultaneous Refractive index Sensor using 1D multichannel photonic crystal device

Tunable Terahertz Perfect Absorber and Polarizer Based on one-Dimensional Anisotropic Graphene Photonic Crystal

Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF2 Defect Layer

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Wideband THz Filtering by Graphene-Over-Dielectric Periodic Structures With and Without MgF₂ Defect Layer