Negative Refractive Index in Left-Handed Materials

Smith, David R.; Kroll, N.

doi:10.1103/physrevlett.85.2933

Cited by 1,094 publications

(590 citation statements)

References 7 publications

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“…The refractive index also means that the wave vector of transmitted wave (k − wz ) is negative. [28][29][30][31] The negative wave vector does not mean that the transmitted wave propagates backward, which violates the conservation of energy. The direction of propagation is better determined by the direction of the Poynting vector.…”

Section: Resultsmentioning

confidence: 99%

Negative Refraction in Weyl Semimetals

Ukhtary

Nugraha

2017

J. Phys. Soc. Jpn.

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We theoretically propose that Weyl semimetals may exhibit negative refraction at some frequencies close to the plasmon frequency, allowing transverse magnetic (TM) electromagnetic waves with frequencies smaller than the plasmon frequency to propagate in the Weyl semimetals. The idea is justified by the calculation of reflection spectra, in which negative refractive index at such frequencies gives physically correct spectra. In this case, a TM electromagnetic wave incident to the surface of the Weyl semimetal will be bent with a negative angle of refraction. We argue that the negative refractive index at the specified frequencies of the electromagnetic wave is required to conserve the energy of the wave, in which the incident energy should propagate away from the point of incidence.

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Section: Resultsmentioning

confidence: 99%

Negative Refraction in Weyl Semimetals

Ukhtary

Nugraha

2017

J. Phys. Soc. Jpn.

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“…They are composed of a periodic lattice of physical features that interact with an applied wave to produce new and useful phenomena including negative refractive index [2][3][4], dispersive properties [5][6][7][8][9][10][11], electromagnetic band gaps [12][13][14][15], anisotropy [16][17][18][19][20][21][22][23][24][25][26][27], and more. All of these phenomena depend strongly on the direction of an applied wave and/or the polarization of the field.…”

Section: Introductionmentioning

confidence: 99%

3d Printed Lattices With Spatially Variant Self-Collimation

Rumpf¹,

Pazos²,

Garcia³

et al. 2013

PIER

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Abstract-In this work, results are given for controlling waves arbitrarily inside a lattice with spatially variant self-collimation. To demonstrate the concept, an unguided beam was made to flow around a 90 • bend without scattering due to the bend or the spatial variance. Control of the field was achieved by spatially varying the orientation of the unit cells throughout a self-collimating photonic crystal, but in a manner that almost completely eliminated deformations to the size and shape of the unit cells. The device was all-dielectric, monolithic, and made from an ordinary dielectric with low relative permittivity (ε r = 2.45). It was manufactured by fused deposition modeling, a form of 3D printing, and its performance confirmed experimentally at around 15 GHz.

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“…Materials that exhibit negative refraction, known as negative index materials or NIMs, possess many remarkable properties such as perfect lensing and cloaking of macroscopic objects. 31,32 A few years ago, a chiral route to negative refraction was discovered, 33 which can occur if the index of refraction of a material is positive but closer to zero than half the absolute magnitude of the CB at that point in the spectrum, namely whenever the following relationship holds …”

Section: Discussionmentioning

confidence: 99%

Observation and calculation of vibrational circular birefringence: A new form of vibrational optical activity

Lombardi

Nafie

2009

Chirality

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We report the first mid-infrared observation of vibrational circular birefringence (VCB) arising from individual chiral molecules. VCB can also be called vibrational optical rotatory dispersion (VORD) and is the Kramers-Kronig transform of vibrational circular dichroism (VCD). The method of measurement involves a simple change in the optical set-up and electronic processing of a VCD spectrometer such that the VCB spectrum appears at twice the polarization modulation frequency as a pseudo vibrational linear dichroism (VLD) spectrum. VCB spectra are also calculated with density function theory (DFT) for the first time using a commercially available program for rotational strengths where the calculated intensities are convolved with the real, dispersive part of a normalized complex Lorentzian lineshape rather than the imaginary, absorptive part, normally used for IR and VCD intensity calculations. Comparison of the measured and calculated VCB, VCD, and IR spectra of (1)-R-limonene and (2)-S-apinene show close agreement and confirm the validity of the new VCB measurements. Chirality 21:E277-E286, 2009. V

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Negative Refractive Index in Left-Handed Materials

Cited by 1,094 publications

References 7 publications

Negative Refraction in Weyl Semimetals

Negative Refraction in Weyl Semimetals

3d Printed Lattices With Spatially Variant Self-Collimation

Observation and calculation of vibrational circular birefringence: A new form of vibrational optical activity

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