Independently tunable infrared absorber using stacked molybdenum disulfide metasurfaces

Ge, Jiahao; Zhang, Yaqiang; Dong, Hongxing; Zhang, Long

doi:10.1016/j.apsusc.2021.151594

Cited by 17 publications

(17 citation statements)

References 43 publications

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“…As in the analysis above, when the thickness of the spacer layer d < 0:3 μm, the theoretical results differ significantly from the simulation results. The spacer layer thickness d should satisfy the condition d > ðP/2πnÞ [21,22]. Otherwise, the firstorder evanescent wave of transmitted light will not vanish before reaching the substrate.…”

Section: Resultsmentioning

confidence: 99%

Resonant Excitation Analysis of the Absorption Enhancement of L-Shaped Metasurfaces in Midinfrared Band

Feng

2022

Journal of Sensors

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Surface plasmon waveguides have attracted a lot of attention in recent years due to their ability to conduct light in the subwavelength scale. A large number of metallic structures have been used as waveguides and applied in integrated photonic circuits. Among these structures, the metal-insulator-metal surface plasmon waveguide is considered to have unique advantages. Compared to other waveguide forms, it is more compact and thus easier to integrate into optical circuits. For these reasons, we investigated the transmission properties of surface plasmon waves in metal-insulator-metal waveguides and built a MIM absorber consisting of gold and dielectric. We developed an interference model for the MIM absorber and concluded that the interactions between the metal patch and the substrate are not negligible in the near field. In addition, magnetic resonance plays an equally important role in approaching uniform absorption. Absorption spectra with different structural parameters, incidence angles, and polarizations were investigated. A sharp absorption peak was also found to be caused by the Rayleigh anomaly. The study reported in this paper contributes to further understanding of the physical properties of the MIM absorber, and we expect to refine the theoretical model in the future to eliminate the bias caused by near-field coupling.

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Section: Resultsmentioning

confidence: 99%

Resonant Excitation Analysis of the Absorption Enhancement of L-Shaped Metasurfaces in Midinfrared Band

Feng

2022

Journal of Sensors

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“…Based on the above analyses, it is verified that the top and bottom nanopatterned graphene layers can be independently manipulated. To the best of our knowledge, this independently tunable property of the perfect absorber is limited in mid-infrared spectra. , Here, we demonstrate that its working wavelength can be extended to the THz region by our proposed metasurfaces. However, with merely the simulation results, the internal mechanisms of the independently tunable property of the proposed metasurface are not intuitive.…”

Section: Resultsmentioning

confidence: 72%

“…Real and imaginary components of (d) r̃ 23 and r̃ m 3 and (e) r̃ 12 and r̃ m 2 coefficients. The vertical pink dotted lines depict the resonant frequencies of four absorption peaks A, B, C, and D. For more details about the interference model, please refer to our previous work . Here, the VO 2 film acts as a reflective mirror that prevents the EM waves from transmitting through the structure, such that r̃ 3 = r̃ 34 , r̃ 43 = 0, and t̃ 3 = t̃ 34 = t̃ 43 = 0.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the absorption peaks A and C do not shift. The relationship between resonant frequencies and Fermi energy levels is also studied and illustrated in Figure 50 Here, the VO 2 film acts as a reflective mirror that prevents the EM waves from transmitting through the structure, such that r3 = r3 4 , r4 3 = 0, and t ̃3 = t ̃34 = t ̃43 = 0. In addition, the coefficients related to layer 4 are not considered in the case of the perfect absorber.…”

Section: Structure Design and Methodsmentioning

confidence: 99%

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Nanolayered VO₂-Based Switchable Terahertz Metasurfaces as Near-Perfect Absorbers and Antireflection Coatings

Zhang

Dong

et al. 2022

ACS Appl. Nano Mater.

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Achieving absorption–transmission switchable devices is still a great challenge due to the complex competitions among absorption, reflection, and transmission. Here, we propose a nanolayered terahertz (THz) metasurface exhibiting switchable functionality from quad-band near-perfect absorption to strongly enhanced transmission. The switchable performances are attributed to the electrical tunability of graphene and insulator–metal transition in vanadium dioxide (VO2). When VO2 functions as a metal, the proposed metasurface performs as a quad-band perfect absorber. The four absorption peaks can be effectively adjusted by altering the related graphene Fermi energy levels. When VO2 is in an insulating state, the proposed device functions as a THz antireflection coating, which diminishes reflection and substantially enhances transmission. In addition, a theoretical interference model is employed to clarify the physical mechanisms behind the near-perfect absorber and antireflection coating. The obtained theoretical results significantly agree with the numerical simulations. Furthermore, owing to the rotationally symmetric patterns, the performances of both the quad-band perfect absorber and antireflection coating are rather insensitive to light polarization and angle of incidence. Hence, our results can facilitate the progress of nanoscale switchable metadevices in the THz regime.

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“…By changing carrier density via applying external gate voltages or bias voltages, the equivalent permittivity and surface conductivity of MoS 2 varies, resulting in modulation of absorption in MoS 2 -based MAs. [151,[172][173][174][175][176] In a very recent work, Ge et al reported a tunable IR MA based on stacked MoS 2 , comprising of two patterned monolayer MoS 2 embedded in insulators. [176] Three absorption peaks with nearly perfect absorption were realized at the frequencies of 17.55, 25.6, and 38.03 THz because different MoS 2 nanostructures were utilized.…”

Section: Advanced 2d Materialsmentioning

confidence: 99%

Metamaterial Absorbers: From Tunable Surface to Structural Transformation

et al. 2022

Advanced Materials

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Since the first demonstration, remarkable progress has been made in the theoretical analysis, structural design, numerical simulation, and potential applications of metamaterial absorbers (MAs). With the continuous advancement of novel materials and creative designs, the absorption of MAs is significantly improved over a wide frequency spectrum from microwaves to the optical regime. Further, the integration of active elements into the MA design allows the dynamical manipulation of electromagnetic waves, opening a new platform to push breakthroughs in metadevices. In the last several years, numerous efforts have been devoted to exploring innovative approaches for incorporating tunability to MAs, which is highly desirable because of the progressively increasing demand on designing versatile metadevices. Here, a comprehensive and systematical overview of active MAs with adaptive and on‐demand manner is presented, highlighting innovative materials and unique strategies to precisely control the electromagnetic response. In addition to the mainstream method by manipulating periodic patterns, two additional approaches, including tailoring dielectric spacer and transforming overall structure are called back. Following this, key parameters, such as operating frequency, relative tuning range, and switching speed are summarized and compared to guide for optimum design. Finally, potential opportunities in the development of active MAs are discussed.

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Independently tunable infrared absorber using stacked molybdenum disulfide metasurfaces

Cited by 17 publications

References 43 publications

Resonant Excitation Analysis of the Absorption Enhancement of L-Shaped Metasurfaces in Midinfrared Band

Resonant Excitation Analysis of the Absorption Enhancement of L-Shaped Metasurfaces in Midinfrared Band

Nanolayered VO₂-Based Switchable Terahertz Metasurfaces as Near-Perfect Absorbers and Antireflection Coatings

Metamaterial Absorbers: From Tunable Surface to Structural Transformation

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Independently tunable infrared absorber using stacked molybdenum disulfide metasurfaces

Cited by 17 publications

References 43 publications

Resonant Excitation Analysis of the Absorption Enhancement of L-Shaped Metasurfaces in Midinfrared Band

Resonant Excitation Analysis of the Absorption Enhancement of L-Shaped Metasurfaces in Midinfrared Band

Nanolayered VO2-Based Switchable Terahertz Metasurfaces as Near-Perfect Absorbers and Antireflection Coatings

Metamaterial Absorbers: From Tunable Surface to Structural Transformation

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Nanolayered VO₂-Based Switchable Terahertz Metasurfaces as Near-Perfect Absorbers and Antireflection Coatings