A fiber optic communication shield based on a two-dimensional molybdenum disulfide broadband absorber

Li, Rui; Pan, Mingyang; Yi, Zao; Yu, Jiaxin; Shi, Pengcheng; Luo, Hao; Wu, Pinghui; Yang, Hua; Wang, Shifa; Guocheng, Gao

doi:10.1016/j.optlastec.2022.108284

Cited by 9 publications

(5 citation statements)

References 59 publications

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“…As can be seen from figure 7(a), as the incidence angle increases from 0 • to 20 • , a strong Fano-like interference peak gradually forms due to the change in the phase delay of the field distribution between adjacent graphene sheets. As the incidence angle further increases to 40 • , we find that the transmittance is very close to that of 20 • within the frequency of 3.5-4.0 THz, which can be ascribed to the symmetry of the proposed structure [34,35]. Therefore, as the angle of incidence changes, the phase delay is controlled, the Fano-like lineshape can also be regulated.…”

Section: Resultsmentioning

confidence: 59%

Dynamic control of Fano-like interference in the graphene periodic structure

Liu

Wen

et al. 2023

J. Phys. D: Appl. Phys.

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We propose and investigate a graphene periodic subsurface structure consisting of a coplanar pair of ring resonators and a ribbon. The Fano-like interference can be actively regulated by the applied magnetic field, incident angle and Fermi energy. Since the excited charges of graphene monolayer have cyclotron properties in the external magnetic field, the transmittance and line-shape can be effectively controlled. At a certain frequency, different magnetic fields have different effects on the conductivity tensor of graphene, which affects the metallic properties of graphene, leading to changes in the transmittance. The Fano-like line-shape can be regulated by adjusting the incident angle to delay the phase between adjacent graphene sheets. In addition, the resonance frequency can be electrically regulated through Fermi energy. Finite element method (FEM) is introduced to analyze the graphene periodic structure and the results are demonstrated by multimode interference coupled mode theory (MICMT). The Faraday rotation angle exceeding 85o are observed in a small magnetic flux density B of about 0.5T. Moreover, a high ON/OFF ratio plasma-optic switching is designed, and the ON/OFF ratio (η) of the switch is 19.921dB. Notably, combining the influence of magnetic flux density on transmittance and the modulation of resonance frequency by Fermi energy, optical switching can be implemented at any frequency within the frequency range studied. These results provide methods for active regulation of electromagnetic waves in the terahertz field and have potential applications in optical switching and integrated photonic circuit.

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Section: Resultsmentioning

confidence: 59%

Dynamic control of Fano-like interference in the graphene periodic structure

Liu

Wen

et al. 2023

J. Phys. D: Appl. Phys.

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“…At the same time, its imaginary part must approach to 0 [38]. As shown in the figure 5(b), the effective impedance of the designed device can be calculated by equation (7). It can be clearly observed from the figure 5(b) that at the resonant absorption peak of 1.546 um, the real part of the impedance of the designed device approaches to 1 and the imaginary part approaches to 0.…”

Section: Results and Analysismentioning

confidence: 95%

“…At the macro scale, this resonance phenomenon is represented by the absorption of light by metal nanoparticles [4,5]. Resonant plasmonic absorbers have a wide range of applications in biosensing, photothermal therapy, thermo electron collection and electromagnetic shielding [6][7][8]. These plasma absorbers are usually divided into broadband and narrow band absorbers.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, this resonance is often used to implement absorbers. With the development of isoplasmon structures such as nanodisks, nanowires and nanopore arrays, a lot of researches have been done on perfect absorption [7,12,13]. Most of these structures are studied as wide-band absorbers in the visible light range, which exhibit unique optical and electrical properties in terms of energy harvesting, but do not have dynamic tunable functions in physical properties.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic tunable narrow-band perfect absorber for fiber -optic communication band based on liquid crystal

Liu,

Li,

Zeng

et al. 2023

J. Phys. D: Appl. Phys.

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At present, most of the reported metasurface structure absorbers show that its working band cannot be regulated actively. In this study, a dynamic tunable narrow-band perfect absorption structure for fiber-optic communication band based on liquid crystal is proposed and studied. The structure is mainly composed of two effective tiers. The top tier gold array and the bottom tier reflective gold film, which are separated by a SiO2-liquid crystal dielectric medium interlayer to form a metal-dielectric-metal (MDM) structure. Due to the unique optical properties of liquid crystals, its index of refraction can be changed by adjusting the bias voltage and temperature, so as to adjust the resonance wavelength actively. The designed structure is analyzed by finite element method (FEM) and the coupled mode theory (CMT) is used to verify the analysis results. The designed structure has a 99.92% absorption effect in the most commonly used band of fiber-optic communication. Due to the symmetry of the absorber structure, the device is not sensitive to the polarisation state of the excitation source. Moreover, the absorber exhibits an unusual dependence on the incident angle, which can be attributed to the anisotropy of the liquid crystal. Based on the dependence of incident angle, a plasma optical switch with large ON/OFF ratio (η) of 27.395dB and nearly flawless modulation depth (MD) of 99.818% can be realized. It is believed that this structure can provide a method for the dynamic control of near infrared electromagnetic waves, and to be applied in electromagnetic energy absorption, filtering and plasma optical switch system.

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“…TMD materials are characterized by extensive optical parameters, suitable carrier mobility, and appropriate absorption coefficient. ,,, The composition and number of layers can be used to control the optical response. Excellent electrically tunable physical properties are ideal for creating functionalized photoelectric information devices. − The most explored materials for these types of applications are molybdenum disulfide (MoS 2 ), − platinum disulfide (PtS 2 ), − ,− molybdenum ditelluride (MoTe 2 ), , and mixed heterostructures. − …”

Section: Introductionmentioning

confidence: 99%

Waveguide-Coupled Light Photodetector Based on Two-Dimensional Molybdenum Disulfide

Hlushchenko,

Olszewski,

Martynkien

et al. 2024

ACS Appl. Mater. Interfaces

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The integration of transition metal dichalcogenides with photonic structures such as sol–gel SiO x :TiO y optical waveguides (WGs) makes possible the fabrication of photonic devices with the desired characteristics in the visible spectral range. In this study, we propose and experimentally demonstrate a MoS2-based photodetector integrated with a sol–gel SiO x :TiO y WG. Based on the spectroscopic measurements performed for our device, we concluded that the light entering the WG is almost completely channeled out from the WG and absorbed by the MoS2 flake, which is deposited on the WG. Therefore, this device works as a photodetector. The light coupling into the MoS2 region in this device construction is due to the high contrast of refractive index between the van der Waals crystal and the sol–gel WG, which is ∼4 and ∼1.8, respectively. The obtained MoS2-based photodetectors exhibit a photoresponsivity of 0.3 A W−1 (n-type MoS2) and 7.53 mA W−1 (p-type MoS2) at a bias voltage of 2 V. These results reveal great potential in the integration of sol–gel WGs with van der Waals crystals in optoelectronic applications.

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A fiber optic communication shield based on a two-dimensional molybdenum disulfide broadband absorber

Cited by 9 publications

References 59 publications

Dynamic control of Fano-like interference in the graphene periodic structure

Dynamic control of Fano-like interference in the graphene periodic structure

Dynamic tunable narrow-band perfect absorber for fiber -optic communication band based on liquid crystal

Waveguide-Coupled Light Photodetector Based on Two-Dimensional Molybdenum Disulfide

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