Dual-band absorption characteristics of one-dimensional photonic crystal with graphene-based defect

Liu, Yujie; Xie, Xun; Xie, Lei; Yang, Zekun; Yang, Hong-Wei

doi:10.1016/j.ijleo.2016.01.121

Cited by 23 publications

(7 citation statements)

References 25 publications

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“…To overcome this problem, various physical mechanisms [ 18 – 43 ] to enhance absorption of graphene in the visible region have been proposed, which include strong photon localization on the defect layer in one-dimensional (1D) photonic crystals [ 18 , 28 , 33 , 38 ], total internal reflection [ 19 , 20 , 23 , 27 ], surface plasmon resonances [ 21 , 22 , 30 , 31 , 33 ], evanescent diffraction orders of the arrays of metal nanoparticles [ 34 ], and critical coupling to guided mode resonances [ 25 , 26 , 32 , 34 , 35 , 37 , 39 – 41 ]. Besides the absorption enhancement in graphene, achieving multiband and broadband light absorption in graphene is also important for some graphene-based optoelectronic devices from a practical point of view.…”

Section: Introductionmentioning

confidence: 99%

“…But, it is still a challenge, as pointed out in the very recent reports [ 44 – 46 ]. At present, different approaches have been proposed to broaden the bandwidth of graphene absorption in wide frequency range from THz [ 44 – 62 ] and infrared [ 63 – 65 ] to optical frequencies [ 19 , 23 , 29 , 31 , 34 – 36 , 38 – 40 , 43 ]. Especially, a multi-resonator approach was proven to be a very effective method to resolve the bandwidth limitation of graphene absorption in the THz and infrared regions [ 45 , 46 , 62 , 63 ].…”

Section: Introductionmentioning

confidence: 99%

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Multiband and Broadband Absorption Enhancement of Monolayer Graphene at Optical Frequencies from Multiple Magnetic Dipole Resonances in Metamaterials

et al. 2018

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It is well known that a suspended monolayer graphene has a weak light absorption efficiency of about 2.3% at normal incidence, which is disadvantageous to some applications in optoelectronic devices. In this work, we will numerically study multiband and broadband absorption enhancement of monolayer graphene over the whole visible spectrum, due to multiple magnetic dipole resonances in metamaterials. The unit cell of the metamaterials is composed of a graphene monolayer sandwiched between four Ag nanodisks with different diameters and a SiO2 spacer on an Ag substrate. The near-field plasmon hybridizations between individual Ag nanodisks and the Ag substrate form four independent magnetic dipole modes, which result into multiband absorption enhancement of monolayer graphene at optical frequencies. When the resonance wavelengths of the magnetic dipole modes are tuned to approach one another by changing the diameters of the Ag nanodisks, a broadband absorption enhancement can be achieved. The position of the absorption band in monolayer graphene can be also controlled by varying the thickness of the SiO2 spacer or the distance between the Ag nanodisks. Our designed graphene light absorber may find some potential applications in optoelectronic devices, such as photodetectors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiband and Broadband Absorption Enhancement of Monolayer Graphene at Optical Frequencies from Multiple Magnetic Dipole Resonances in Metamaterials

et al. 2018

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“…In addition, many 2D and 3D nanostructures are also used to enhance optical absorption such as periodic air holes [18], elliptical nano-disk arrays [19], and metal nanocavity arrays [20]. Compared with 2D and 3D nanostructures, 1D PCs are simpler in the spatial dimension and easier to prepare, so many research works focus on modulating optical properties by 1D nanostructures [21][22][23][24][25][26] including enhancing optical absorption in PCs containing different defects [26][27][28]. Currently, the study of perfect absorption in a super wide band is less.…”

Section: Introductionmentioning

confidence: 99%

Tunable perfect optical absorption in truncated photonic crystals with lossy defects

Yan

Zhou

et al. 2022

Front. Phys.

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We theoretically investigate tunable optical absorption properties of photonic crystals containing lossy materials as defects. It is found that a lossy defect can induce one or multiple perfect absorption peaks in the bandgap of photonic crystals and the number of the peaks mainly depends on the thickness of the defect layer. On the one hand, multiple complete absorption peaks can also emerge in the photonic bandgap when multiple lossy defects are inserted within the photonic crystals, and the resonant wavelengths of absorption peaks can be modulated by changing the distances among the defects. On the other hand, the optical absorption away from resonant wavelengths is nearly zero in the whole visible range. Such nanostructures can be used to engineer novel optical devices such as tunable single-channel and multi-channel perfect optical absorbers.

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“…Graphene has become a rising concern because of having distinctive optical properties including the strong interaction between graphene and light, the broad optical absorption, the controllable optical properties owing to tunability of the charge carrier density by electrically modulating the bias voltage, and high charge carrier mobility . A large number of researchers apply graphene to achieve high absorption, broadband THz filter, multiband THz filters, and so on . Hyperbolic metamaterials (HMMs), exhibiting hyperbolic dispersion in space of wave propagation, have rapidly become another influential themes.…”

Section: Introductionmentioning

confidence: 99%

Perfect Absorption in One–Dimensional Photonic Crystal with Graphene‐Dielectric Hyperbolic Metamaterials

Xie

et al. 2018

Physica Status Solidi (b)

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The absorption characteristics of one‐dimensional photonic crystals (1DPC) consisting of an ordinary dielectric and graphene–dielectric hyperbolic metamaterials in terahertz (THz) are theoretically analyzed and numerically simulated using the transfer matrix method. The perfect absorption peaks can be achieved in the structure designed in our research. In the 1DPC, the dielectric layers are embedded into graphene layers and the optical axis of the graphene–dielectric hyperbolic metamaterials is normal to the graphene layers. The graphene–dielectric layers are seen as anisotropic effective medium and possess the properties of hyperbolic dispersion in THz frequency band. The locations of perfect absorptance peaks are dependent on chemical potential, the thicknesses of dielectric layers and the inclined angle. The positions of absorption peaks are blue‐shifted with increasing the chemical potential and red‐shifted by increasing the thicknesses of the dielectric layers. We testified that the orientation of the optical axis of the graphene–dielectric layers has prominent effect on the locations of the perfect absorption peaks. Moreover, multiband absorption peaks can be obtained by introducing more structure as given in our research with different parameters. The controllable perfect absorption achieved at the far infrared ray (FIR) frequencies could be applied in the design of multichannel perfect absorption filters.

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Dual-band absorption characteristics of one-dimensional photonic crystal with graphene-based defect

Cited by 23 publications

References 25 publications

Multiband and Broadband Absorption Enhancement of Monolayer Graphene at Optical Frequencies from Multiple Magnetic Dipole Resonances in Metamaterials

Multiband and Broadband Absorption Enhancement of Monolayer Graphene at Optical Frequencies from Multiple Magnetic Dipole Resonances in Metamaterials

Tunable perfect optical absorption in truncated photonic crystals with lossy defects

Perfect Absorption in One–Dimensional Photonic Crystal with Graphene‐Dielectric Hyperbolic Metamaterials

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