Crystals with an Open Wave-Vector Surface: Peculiarities of Reflection and Possibilities of Designing Flat Lenses

Eritsyan, O. S.; Lalayan, A.A.; Arakelyan, O. M.; Papoyan, A. A.; Kostanyan, R. B.

doi:10.1134/s1063774510060076

Cited by 11 publications

(9 citation statements)

References 10 publications

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“…One very simple way of achieving the necessary negative refraction is to make the slab from a nonmagnetic anisotropic medium two of whose principal axes have dielectric tensor components of opposing signs. [6][7][8][9][10][11][12][13][14][15] Media of this type are often referred to as hyperbolic media, due to the form of the associated wavevector dispersion. In the correct configuration, they induce negative refraction at all incident angles θ 1 in the range −90 0 ≤ θ 1 ≤ 90 0 , thus making them particularly promising for the construction of slab lenses.…”

Section: Introductionmentioning

confidence: 99%

“…32,33 However, it should not be forgotten that, around the optic phonon frequencies, the dielectric tensor of certain natural anisotropic crystals may display the required characteristics, with the associated all-angle negative refraction, without the necessity of growing artificial metamaterial structures. 9,10,13,14 Note that all-angle negative refraction of this type should not be confused with negative refraction due to conventional birefringence in a uniaxial crystal whose surface is cut obliquely to the optic axis. 34 Such negative refraction only occurs over a small range of incident angles, and the condition necessary for slab lensing (that negative refraction occurs for both positive and negative angles of incidence) is not satisfied.…”

Section: Introductionmentioning

confidence: 99%

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Far-infrared slab lensing and subwavelength imaging in crystal quartz

et al. 2012

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We examine the possibility of using negative refraction stemming from the phonon polariton response in an anisotropic crystal to create a simple slab lens with plane parallel sides, and show that imaging from such a lens should be possible at room temperature despite the effects of absorption that are inevitably present due to phonon damping. In particular, we consider the case of crystal quartz, a system for which experimental measurements consistent with all-angle negative refraction associated with the phonon polariton response have already been demonstrated. Furthermore, we investigate the possibility of subwavelength imaging from such materials, and show that it should be possible for certain configurations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Far-infrared slab lensing and subwavelength imaging in crystal quartz

et al. 2012

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“…We also note the experimental work on determining the components with different signs of the tensor [10] and the work [11] on the experimental confirmation of some conclusions of the theory developed in [8].…”

Section: Introductionmentioning

confidence: 72%

“…According to (8), ( 9), and (10), we obtain (11) that is, in the wave with index 1 ( ) the vectors k and S are antiparallel, and in the wave with index 2 (…”

Section: Anisotropic Homogeneous Non-gyrotropic Media Combiningmentioning

confidence: 99%

Polarization and Diffraction Peculiarities of Optical Media Possessing Simultaneously the Properties of Right and Left Substances

et al. 2020

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With the simultaneous presence of positive and negative components both in the permittivity tensor ij and in the tensor of magnetic permeability μ ij , the propagation of an electromagnetic wave in optically homogeneous anisotropic media, and in periodically inhomogeneous media with a spiral structure is considered. It is shown that depending on polarization, such media exhibit the properties of both dextrorotatory and levorotatory substances. It is shown also that the medium with a spiral periodic structure may have the property of total diffraction reflection of the wave of any polarization. In the case of the presence of different signs of components of ij and μ ij in the spiral medium, it is revealed that two regions of diffraction reflection are formed, corresponding to the two waves with circular polarization with mutually opposite rotation of the polarization.

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“…In addition, the intrinsic layered structure of graphite has been shown to lead to an indefinite permittivity in the ultraviolet region [16]. At far-infrared frequencies, the phonon response in certain natural anisotropic crystals can also lead to an indefinite permittivity tensor, so that all-angle negative refraction is possible around the optic phonon frequencies in such crystals [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Tunable all-angle negative refraction using antiferromagnets

Macêdo

Dumelow

2014

Phys. Rev. B

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We show how all-angle negative refraction can occur in a uniaxial antiferromagnet close to the magnon resonance frequency. This behavior is based on the fact that, in such cases, the antiferromagnet acts as an indefinite permeability medium, i.e., not all its permeability tensor components are of the same sign. If an external magnetic field is applied, the angle of refraction becomes tunable, and can be made to change sign. We illustrate these effects using the example of MnF 2 at low temperature, and show that in this system negative refraction should occur with a large figure of merit.

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Crystals with an Open Wave-Vector Surface: Peculiarities of Reflection and Possibilities of Designing Flat Lenses

Cited by 11 publications

References 10 publications

Far-infrared slab lensing and subwavelength imaging in crystal quartz

Far-infrared slab lensing and subwavelength imaging in crystal quartz

Polarization and Diffraction Peculiarities of Optical Media Possessing Simultaneously the Properties of Right and Left Substances

Tunable all-angle negative refraction using antiferromagnets

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