Peculiarities of light scattering by nanoparticles and nanowires near plasmon resonance frequencies in weakly dissipating materials

Luk’yanchuk, Boris; Tribelsky, Michael I.; Ternovsky, V; Wang, Z B; Hong, Minghui; Shi, Li-kun; Chong, Tow Chong

doi:10.1088/1464-4258/9/9/s03

Cited by 60 publications

(44 citation statements)

References 17 publications

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“…The above-described features of the energy flow pattern are attributed to the discontinuous behavior of the tangential component of the Poynting vector at the column surface, although the radial component S ρ of this vector remains continuous for ρ = a. As a result, the Poynting-vector lines undergo refraction at the column surface similarly to that observed at the boundary of an isotropic cylinder [18,19].…”

Section: Scattering At the Surface Plasmon Resonancesmentioning

confidence: 90%

Scattering of an Obliquely Incident Plane Electromagnetic Wave by a Magnetized Plasma Column: Energy Flow Patterns at Plasmon Resonances

Es'kin¹,

Ivoninsky²,

Kudrin³

2015

PIER B

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Abstract-The scattering of an obliquely incident H-polarized plane electromagnetic wave by a magnetized plasma column is studied. It is assumed that the column is located in free space and aligned with an external static magnetic field. The emphasis is placed on the case where the angular frequency of the incident wave coincides with one of the surface-or volume-plasmon resonance frequencies of the column. The spatial structures of the field and energy flow patterns in the near zone of the column are analyzed, and the location of the regions with a greatly enhanced magnitude of the timeaveraged Poynting vector is determined. It is shown that the sign reversal of the longitudinal energy-flow component that is parallel to the column axis can occur when passing across the boundary between the inner region of the column and the surrounding medium.

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Section: Scattering At the Surface Plasmon Resonancesmentioning

confidence: 90%

Scattering of an Obliquely Incident Plane Electromagnetic Wave by a Magnetized Plasma Column: Energy Flow Patterns at Plasmon Resonances

Es'kin¹,

Ivoninsky²,

Kudrin³

2015

PIER B

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“…According to above theoretical analysis, the exact plasmon resonance appears when m = 0, which results in real and finite values |B m | = 1 at the resonance frequencies in both isotropic and anisotropic cases [15][16][17]19]. For a metallic cylinder, there are two different branches of optical resonances [15,19].…”

Section: Theoretical Calculationsmentioning

confidence: 90%

“…Incidentally, it is evident that the scattering coefficient B m reduces to the isotropic case by replacing ε r (ε t ) and µ z (µ t ) with ε and µ, respectively [11]. For the case of far field, the scattering efficiency of a circular cylinder can be expressed by B m [11,14,15,19],…”

Section: Formalismmentioning

confidence: 99%

“…For a metallic cylinder, there are two different branches of optical resonances [15,19]. The first branch is for broad volume resonances, which associates with the excitation of volume waves from the cylindrical cavity (we call them volume modes).…”

Section: Theoretical Calculationsmentioning

confidence: 99%

“…However, for a small sphere with weak dissipation near plasmon resonant frequencies, based on the Mie full-wave electromagnetic theory [11][12][13][14], the scattering can strongly deviate from Rayleigh scattering and is characterized by very anomalous properties [1,15,16]. These anomalous properties include sharp giant optical resonances, enhanced scattering cross sections, complicated energy circulation, the increase of extinction cross section with increasing the order of resonance, etc.…”

Section: Introductionmentioning

confidence: 99%

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Plasmonic Resonant Light Scattering by a Cylinder With Radial Anisotropy

Jin¹,

Gao²,

Gao³

2010

PIER

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Abstract-We apply the full-wave electromagnetic theory to study electromagnetic scattering by a small cylindrical particle with radial anisotropy for normally incident light with transverse magnetic (TM) polarization. The scattering coefficients are derived, when the radial anisotropies in both the permittivity and permeability tensors are taken into account. It is shown that the surface and volume plasmon resonances can be identified by the sign of dε t /dq, in which ε t is the permittivity element in a direction tangential to the local r-axis, and q is the size parameter. The near field distributions for surface and volume modes are illustrated by finite element method. It is found that small changes of anisotropy can affect the scattering efficiencies significantly. Moreover, the quadrupole and octupole resonant peaks may be much higher and sharper than those of dipole resonance in the scattering efficiency spectra.

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Super‐Enhancement Focusing of Teflon Spheres

et al. 2020

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A Teflon (polytetrafluoroethylene) sphere can be used as a focusing lens in the applications of imaging and sensing due to its low-loss property in the terahertz band. Herein, field intensities and focusing parameters are analytically calculated for Teflon spheres at different low-loss levels and then a super-enhancement focusing effect in the spheres with particular size parameters was discovered, which can stimulate about 4000 times stronger field intensity than that for incident radiation as well as the great potential of overcoming diffraction limit despite high sensitivity to the magnitude of Teflon loss. A subsequent analysis of scattering amplitudes proves that the strong scattering of a single-order mode in the internal electric or magnetic field is the main factor causing this phenomenon.

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Peculiarities of light scattering by nanoparticles and nanowires near plasmon resonance frequencies in weakly dissipating materials

Cited by 60 publications

References 17 publications

Scattering of an Obliquely Incident Plane Electromagnetic Wave by a Magnetized Plasma Column: Energy Flow Patterns at Plasmon Resonances

Scattering of an Obliquely Incident Plane Electromagnetic Wave by a Magnetized Plasma Column: Energy Flow Patterns at Plasmon Resonances

Plasmonic Resonant Light Scattering by a Cylinder With Radial Anisotropy

Super‐Enhancement Focusing of Teflon Spheres

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