Experimental realization of three-dimensional indefinite cavities at the nanoscale with anomalous scaling laws

Yang, Xiaodong; Yao, Jie; Rho, Junsuk; Yin, Xiaobo; Zhang, Xiang

doi:10.1038/nphoton.2012.124

Cited by 345 publications

(281 citation statements)

References 33 publications

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“…Two identical HM waveguides composed of alternating metal-dielectric multi layers [25,26] with a square cross section of 250 nm × 250 nm are placed adjacent to the both sides of a nonlinear organic polymer in the slot (height g = 20 nm). The assumed polymer is a doped, cross-linked organic polymer with a nonlinear susceptibility of χ (2) 111 = 619 pm/V [15,27] and refractive index n = 1.68 at the wavelength of λ = 1,550 nm (n = 1.58 at λ 3,100 nm) [24]. The hyperbolic metamaterials were composed by alternate thin layers of silver (Ag, filling ratio f r ) and germanium (Ge) with a pitch thickness of 10 nm [24].…”

Section: Waveguide Structurementioning

confidence: 99%

“…The assumed polymer is a doped, cross-linked organic polymer with a nonlinear susceptibility of χ (2) 111 = 619 pm/V [15,27] and refractive index n = 1.68 at the wavelength of λ = 1,550 nm (n = 1.58 at λ 3,100 nm) [24]. The hyperbolic metamaterials were composed by alternate thin layers of silver (Ag, filling ratio f r ) and germanium (Ge) with a pitch thickness of 10 nm [24]. The metamaterial can be treated as a homogeneous effective medium [25,26].…”

Section: Waveguide Structurementioning

confidence: 99%

“…The HM display open-curved hyperbolic dispersion, which originates from one of the principal components of their electric effective tensor having the opposite sign to the other two [23]. Extremely large wave vectors are supported in the HM due to the unbound hyperbolic dispersion [24]. The giant momentum mismatch between the HM and air results in total internal reflection at the interfaces [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…Extremely large wave vectors are supported in the HM due to the unbound hyperbolic dispersion [24]. The giant momentum mismatch between the HM and air results in total internal reflection at the interfaces [24,25]. So the HM waveguide enables the deep subwavelength confinement with ultrahigh effective index [25], which exceeds those of traditional plasmonic-based structures.…”

Section: Introductionmentioning

confidence: 99%

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Highly efficient second harmonic generation in hyperbolic metamaterial slot waveguides with large phase matching tolerance

Sun¹,

Zhang²,

Cheng³

et al. 2015

Opt. Express

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Highly efficient second harmonic generation (SHG) bridging the mid-infrared (IR) and near-IR wavelengths in a coupled hyperbolic metamaterial waveguide with a nonlinear-polymer-filled nanoscale slot is theoretically investigated. By engineering the geometrical parameters, the collinear phase matching condition is satisfied between the even hybrid modes at the fundamental frequency (3,100 nm) and the second harmonic (1,550 nm). Two modes manifest the great field overlap and the significant field enhancement in the nonlinear integration area (i.e. the slot), which leads to extreme large nonlinear coupling coefficient. For a low pumping power of 100 mW, the device length is as short as 2.19 µm and the normalized conversion efficiency comes up to more than 6.37 × 10 5 W −1 cm −2 which outperforms that of the plasmonic-based structures. Moreover, the efficient SHG can be achieved with great phase matching tolerance, i.e., a small theoretical fabrication-error sensitivity to filling ratio and a broad pump bandwidth in a compact device length of 2.19 µm using 100 mW pump. The proposed scheme links the mature near-IR devices to the mid-IR regime and have a great potential for integrated chip-scale alloptical signal processes.

show abstract

Section: Waveguide Structurementioning

confidence: 99%

Section: Waveguide Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Highly efficient second harmonic generation in hyperbolic metamaterial slot waveguides with large phase matching tolerance

Sun¹,

Zhang²,

Cheng³

et al. 2015

Opt. Express

View full text Add to dashboard Cite

show abstract

“…This gives rise to the field of anisotropic metamaterials, which enable flexible control of electromagnetic and acoustic waves for realizing functional devices with unique properties 22,23,28,[39][40][41] . Here we report a metamaterial-enhanced acoustic sensing system based on highly anisotropic acoustic metamaterials (see Fig.…”

mentioning

confidence: 99%

Enhanced acoustic sensing through wave compression and pressure amplification in anisotropic metamaterials

et al. 2014

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Acoustic sensors play an important role in many areas, such as homeland security, navigation, communication, health care and industry. However, the fundamental pressure detection limit hinders the performance of current acoustic sensing technologies. Here, through analytical, numerical and experimental studies, we show that anisotropic acoustic metamaterials can be designed to have strong wave compression effect that renders direct amplification of pressure fields in metamaterials. This enables a sensing mechanism that can help overcome the detection limit of conventional acoustic sensing systems. We further demonstrate a metamaterial-enhanced acoustic sensing system that achieves more than 20 dB signal-to-noise enhancement (over an order of magnitude enhancement in detection limit). With this system, weak acoustic pulse signals overwhelmed by the noise are successfully recovered. This work opens up new vistas for the development of metamaterialbased acoustic sensors with improved performance and functionalities that are highly desirable for many applications.

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Fabrication of Hybrid Nanostructures via Nanoscale Laser‐Induced Reshaping for Advanced Light Manipulation

et al. 2016

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Ordered hybrid nanostructures for nanophotonics applications are fabricated by a novel approach via femtosecond laser melting of asymmetric metal-dielectric (Au/Si) nanoparticles created by lithographical methods. The approach allows selective reshaping of the metal components of the hybrid nanoparticles without affecting the dielectric ones and is applied for tuning of the scattering properties of the hybrid nanostructures in the visible range.

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Experimental realization of three-dimensional indefinite cavities at the nanoscale with anomalous scaling laws

Cited by 345 publications

References 33 publications

Highly efficient second harmonic generation in hyperbolic metamaterial slot waveguides with large phase matching tolerance

Highly efficient second harmonic generation in hyperbolic metamaterial slot waveguides with large phase matching tolerance

Enhanced acoustic sensing through wave compression and pressure amplification in anisotropic metamaterials

Fabrication of Hybrid Nanostructures via Nanoscale Laser‐Induced Reshaping for Advanced Light Manipulation

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