Mechanically tunable terahertz metamaterials

Li, Jining; Shah, Charan M.; Withayachumnankul, Withawat; Ung, Benjamin S.-Y.; Mitchell, Arnan; Sriram, Sharath; Bhaskaran, Madhu; Chang, Shengjiang; Abbott, Derek

doi:10.1063/1.4773238

Cited by 148 publications

(117 citation statements)

References 26 publications

(27 reference statements)

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“…13 The metasurface tunability can also be achieved by manipulating the nearfield interactions via varying unit cell periods. [14][15][16][17] Other methods to achieve tunable metasurfaces or metamaterials include the use of phase-change materials, 18,19 voltage-controlled coupling, 20 and thermal stimulus. 21 Incorporating resonant elements on stretchable substrates enables mechanical tuning of the optical responses of metasurfaces.…”

Section: Abstract: Nanophotonics · Stretchable Electronics · Subwavelmentioning

confidence: 99%

Mechanically Tunable Dielectric Resonator Metasurfaces at Visible Frequencies

Gutruf¹,

et al. 2015

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Devices that manipulate light represent the future of information processing. Flat optics and structures with subwavelength periodic features (metasurfaces) provide compact and efficient solutions. The key bottleneck is efficiency, and replacing metallic resonators with dielectric resonators has been shown to significantly enhance performance. To extend the functionalities of dielectric metasurfaces to real-world optical applications, the ability to tune their properties becomes important. In this article, we present a mechanically tunable all-dielectric metasurface. This is composed of an array of dielectric resonators embedded in an elastomeric matrix. The optical response of the structure under a uniaxial strain is analyzed by mechanical−electromagnetic co-simulations. It is experimentally demonstrated that the metasurface exhibits remarkable resonance shifts. Analysis using a Lagrangian model reveals that strain modulates the near-field mutual interaction between resonant dielectric elements. The ability to control and alter inter-resonator coupling will position dielectric metasurfaces as functional elements of reconfigurable optical devices.

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Section: Abstract: Nanophotonics · Stretchable Electronics · Subwavelmentioning

confidence: 99%

Mechanically Tunable Dielectric Resonator Metasurfaces at Visible Frequencies

Gutruf¹,

et al. 2015

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“…In particular, [15] experimentally demonstrates the effective tunability of the resonance frequency at a wide spectral range, using metamaterial with highly elastomeric substrate. Such a metamaterial is formed by planar array of so called I-shaped resonant elements deposited on elastic substrates.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, most microwave metamaterials controlled by electrically provide functionality only within a narrow spectral range. In the same time, the mechanical adjustment of metamaterials parameters has several advantages among which is a greater spectral range of parameters variation [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Mechanically Tunable Wire Medium Metamaterial in the Millimeter Wave Band

Ivzhenko¹,

Odarenko²,

Tarapov³

2016

PIER Letters

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Abstract-The paper is devoted to experimental and theoretical study of spectra zone characteristics of the wire medium metamaterial with mechanically tunable unit cell. We experimentally demonstrated the effective control possibility of the spectral characteristics of wire medium metamaterial by varying its elementary unit-cell geometry. We established conditions under which the experimental implementation of the wire medium metamaterial at microwaves possesses the properties of a plasma-like medium and the properties band gap structure. A good agreement between the experiment and theory is demonstrated.

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“…Various resonance modes such as inductive-capacitive (LC) resonance, dipole resonance, and quadruple resonance appear in the metamaterials when the circular current is generated by interacting with incident light. The properties of each resonance mode are mainly governed by geometrical factors such as periodicity, gap width, metal thickness, and side arm length [4,[12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effective Sensing Volume of Terahertz Metamaterial with Various Gap Widths

Park

Yoon

Ahn

2016

Journal of the Optical Society of Korea

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We studied experimentally and theoretically the vertical range of the confined electric field in the gap area of metamaterials, which was analyzed for various gap widths using terahertz time-domain spectroscopy. We measured the resonant frequency as a function of the thickness of poly(methyl methacrylate) in the range 0 to 3.2 μm to quantify the effective detection volumes. We found that the effective vertical range of the metamaterial is determined by the size of the gap width. The vertical range was found to decrease as the gap width of the metamaterial decreases, whereas the sensitivity is enhanced as the gap width decreases due to the highly concentrated electric field. Our experimental findings are in good agreement with the finite-difference time-domain simulation results. Finally, a numerical expression was obtained for the vertical range as a function of the gap width. This expression is expected to be very useful for optimizing the sensing efficiency.

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Mechanically tunable terahertz metamaterials

Cited by 148 publications

References 26 publications

Mechanically Tunable Dielectric Resonator Metasurfaces at Visible Frequencies

Mechanically Tunable Dielectric Resonator Metasurfaces at Visible Frequencies

Mechanically Tunable Wire Medium Metamaterial in the Millimeter Wave Band

Effective Sensing Volume of Terahertz Metamaterial with Various Gap Widths

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