Electrically controllable plasmon induced reflectance in hybrid metamaterials

Habib, Mohsin; Gokbayrak, Murat; Özbay, Ekmel; Çağlayan, Hümeyra

doi:10.1063/1.5063461

Cited by 19 publications

(7 citation statements)

References 50 publications

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“…Nonetheless, there are no fundamental works describing how to achieve robust BICs on a general basis, except for well-known symmetry-protected and accidental degeneracies appearing in photonic crystals [3] and asymmetric metasurfaces [7]. A variety of resonant phenomena, such as surface plasmon lattice resonances in the optical domain [13][14][15][16][17][18][19], Fano resonances [20][21][22][23][24][25][26], and electromagnetically induced transparency at optical and THz frequencies [27][28][29][30][31][32][33][34][35][36], have been reported in metasurfaces; however, robust symmetry-protected BICs remain unexplored. Metasurfaces are especially interesting for this purpose due to their enhanced collective response [21,26,[37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces

Abujetas

Hoof

Huurne

et al. 2019

Optica

184

123

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Section: Introductionmentioning

confidence: 99%

Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces

Abujetas

Hoof

Huurne

et al. 2019

Optica

184

123

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“…This substrate with metal contacts was placed on top of the PIR device and separated by an insulating tape. An ionic liquid was inserted between the two substrates; a source was connected to the graphene layer and metal contacts using a conductive tape [33,34,55]. By applying the gate voltage, capacitance was produced between the graphene layer and the gold contact due to the presence of ionic liquid, and we could control the charge accumulation on top of the graphene layer.…”

Section: Methodsmentioning

confidence: 99%

Tuning Plasmon Induced Reflectance with Hybrid Metasurfaces

2019

Self Cite

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Electrically tunable metasurfaces with graphene offer design flexibility to efficiently manipulate and control light. These metasurfaces can be used to generate plasmon-induced reflectance (PIR), which can be tuned by electrostatic doping of the graphene layer. We numerically investigated two designs for tunable PIR devices using the finite difference time-domain (FDTD) method. The first design is based on two rectangular antennas of the same size and a disk; in the second design, two parallel rectangular antennas with different dimensions are used. The PIR-effect was achieved by weak hybridization of two bright modes in both devices and tuned by changing the Fermi level of graphene. A total shift of ∼362 nm was observed in the design with the modulation depth of 53% and a spectral contrast ratio of 76%. These tunable PIR devices can be used for tunable enhanced biosensing and switchable systems.

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“…Due to its specific features, such as low Ohmic losses, high field confinement and gate-tunable electro-optical response, graphene has also been employed as a building block component to achieve tunable and efficient EIT-like response; i.e. by either patterning graphene itself or by its integration to metasurfaces [22][23][24][25][26][27][28]. Moreover, integrating metasurfaces with anisotropic 2D materials can lead to strong light modulation and tunable EIT-like response [29].…”

Section: Introductionmentioning

confidence: 99%

VO₂–graphene-integrated hBN-based metasurface for bi-tunable phonon-induced transparency and nearly perfect resonant absorption

Erçağlar¹,

Hajian²,

Özbay³

2021

J. Phys. D: Appl. Phys.

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A bi-tunable hexagonal boron nitride (hBN)-based metasurface with bi-functional phonon-induced transparency (PIT) and nearly perfect resonant absorption features in the mid-infrared (MIR) range is proposed. The metasurface, that is composed of axially symmetric hBN rings, is separated from a uniform thin vanadium dioxide (VO2) film with a SiO2 spacing layer and is integrated with a top graphene sheet. For the insulating phase of VO2 (i-VO2), PIT with an 80% transmission contrast ratio is observed inside the reststrahlen (RS) band of hBN due to the support of hyperbolic phonon polaritons. A considerably large group delay of 9.5 ps and up to 1.8 THz RIU−1 frequency shift per refractive index unit is also achieved for the i-VO2 case. On the other hand, it is found that for the metallic phase of VO2 (m-VO2), light transmission is prohibited and nearly perfect resonant absorption peaks are appeared inside the RS band of hBN. Finally, by integrating the hBN-based metasurface into the graphene sheet on the top, a tunable PIT-like effect and nearly perfect light absorption is achieved duo to the hybridization of graphene plasmons and hBN phonons. This leads to a modulation depth as high as 87% in the transmission (i-VO2) and 62% in the absorption (m-VO2) responses. Our findings offer a tunable and bi-functional device that is practical for MIR slow-light, sensing, and thermal emission applications.

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Electrically controllable plasmon induced reflectance in hybrid metamaterials

Cited by 19 publications

References 50 publications

Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces

Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces

Tuning Plasmon Induced Reflectance with Hybrid Metasurfaces

VO₂–graphene-integrated hBN-based metasurface for bi-tunable phonon-induced transparency and nearly perfect resonant absorption

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Electrically controllable plasmon induced reflectance in hybrid metamaterials

Cited by 19 publications

References 50 publications

Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces

Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces

Tuning Plasmon Induced Reflectance with Hybrid Metasurfaces

VO2–graphene-integrated hBN-based metasurface for bi-tunable phonon-induced transparency and nearly perfect resonant absorption

Contact Info

Product

Resources

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VO₂–graphene-integrated hBN-based metasurface for bi-tunable phonon-induced transparency and nearly perfect resonant absorption