Near-field-coupled lighting-rod effect for emissivity or absorptivity enhancement of 2-D (1, 2) magnetic plasmon mode by rotating the square resonators array

2020 ◽  
Vol 240 ◽  
pp. 106631 ◽  
Author(s):  
Lei Zhao ◽  
Zhihong He ◽  
Qinglin Niu ◽  
Xiao Yang ◽  
Shikui Dong
Keyword(s):  
Near Field ◽  
Plasmon Mode ◽  
Magnetic Plasmon

scholarly journals Interplay between out-of-plane magnetic plasmon and lattice resonance for modified resonance lineshape and near-field enhancement in double nanoparticles array

2013 ◽  
Vol 22 (12) ◽  
pp. 127802 ◽  
Author(s):  
Pei Ding ◽  
Jun-Qiao Wang ◽  
Jin-Na He ◽  
Chun-Zhen Fan ◽  
Gen-Wang Cai ◽  
...  
Keyword(s):  
Near Field ◽  
Field Enhancement ◽  
Out Of Plane ◽  
Magnetic Plasmon

scholarly journals A Fabry-Pérot cavity coupled surface plasmon photodiode for electrical biomolecular sensing

2021 ◽  
Author(s):  
Giles Allison ◽  
Amrita Sana ◽  
Yuta Ogawa ◽  
Hidemi Kato ◽  
Kosei Ueno ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Specular Reflection ◽  
Incident Light ◽  
Near Field ◽  
Photovoltaic Cell ◽  
Plasmon Mode ◽  
Label Free ◽  
Plasmonic Sensor ◽  
Label Free Detection ◽  
Fabry Perot

Abstract Surface plasmon resonance (SPR) is a well-established technology for real-time highly sensitive label-free detection and measurement of binding kinetics between biological samples. A common drawback, however, of SPR detection is the necessity for far field angular resolved measurement of specular reflection, which increases the size as well as requiring precise calibration of the optical apparatus. Here we present an alternative optoelectronic approach in which the plasmonic sensor is integrated within a photovoltaic cell. Incident light generates an electronic signal that is sensitive to the refractive index (RI) of a solution via interaction with the plasmon. The photogenerated current is enhanced due to the coupling of the plasmon mode with Fabry-Pérot (FP) modes in the absorbing layer of the photovoltaic cell. The near field electrical detection of SPR we demonstrate will enable a new generation of cheap, compact and high throughput biosensors.

scholarly journals Ultranarrow and Tunable Fano Resonance in Ag Nanoshells and a Simple Ag Nanomatryushka

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2039
Author(s):  
Ping Gu ◽  
Xiaofeng Cai ◽  
Guohua Wu ◽  
Chenpeng Xue ◽  
Jing Chen ◽  
...  
Keyword(s):  
Electric Fields ◽  
Plasmon Resonance ◽  
Slow Light ◽  
Structural Parameters ◽  
Near Field ◽  
Plasmon Mode ◽  
Formation Mechanisms ◽  
Hybrid Mode ◽  
High Q ◽  
Field Coupling

We study theoretically the Fano resonances (FRs) produced by the near-field coupling between the lowest-order (dipolar) sphere plasmon resonance and the dipolar cavity plasmon mode supported by an Ag nanoshell or the hybrid mode in a simple three-layered Ag nanomatryushka constructed by incorporating a solid Ag nanosphere into the center of Ag nanoshell. We find that the linewidth of dipolar cavity plasmon resonance or hybrid mode induced FR is as narrow as 6.8 nm (corresponding to a high Q-factor of ~160 and a long dephasing time of ~200 fs) due to the highly localized feature of the electric-fields. In addition, we attribute the formation mechanisms of typical asymmetrical Fano line profiles in the extinction spectra to the constructive (Fano peak) and the destructive interferences (Fano dip) arising from the symmetric and asymmetric charge distributions between the dipolar sphere and cavity plasmon or hybrid modes. Interestingly, by simply adjusting the structural parameters, the dielectric refractive index required for the strongest FR in the Ag nanomatryushka can be reduced to be as small as 1.4, which largely reduces the restriction on materials, and the positions of FR can also be easily tuned across a broad spectral range. The ultranarrow linewidth, highly tunability together with the huge enhancement of electric fields at the FR may find important applications in sensing, slow light, and plasmon rulers.

Exciton Bose-Einstein Condensation in Double Walled Carbon Nanotubes

MRS Advances ◽  
2017 ◽  
Vol 2 (44) ◽  
pp. 2401-2406
Author(s):  
Igor V. Bondarev ◽  
Adrian Popescu
Keyword(s):  
Carbon Nanotube ◽  
Near Field ◽  
Participation Rate ◽  
Plasmon Mode ◽  
Plasmon Coupling ◽  
Einstein Condensation ◽  
Bose Einstein Condensation ◽  
Bose Einstein ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

ABSTRACTWe demonstrate theoretically the possibility for the Bose-Einstein condensation of excitons in properly selected double walled carbon nanotube structures. The condensation mechanism is enabled by the interaction of excitons residing on one tubule with the near-field generated by the plasmon mode of the other coaxial tubule, resulting in new hybridized bosonic quasiparticles called exciton-plasmons. We derive the dispersion relation for the exciton-plasmons, and calculate the exciton participation rate in the exciton-plasmon condensate. The requirements for forming the appropriate double walled carbon nanotube combinations capable of the optimum exciton-plasmon coupling regime needed to realize the condensation effect, as well as the possibility of experimental observation of the phenomenon, are discussed.

scholarly journals Transition to strong coupling regime in hybrid plasmonic systems: exciton-induced transparency and Fano interference

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Tigran V. Shahbazyan
Keyword(s):  
Strong Coupling ◽  
Energy Exchange ◽  
Near Field ◽  
Plasmon Mode ◽  
Strong Coupling Regime ◽  
Field Coupling ◽  
Fano Interference ◽  
Scattering Spectra ◽  
Spectral Asymmetry ◽  
Induced Transparency

Abstract We present a microscopic model describing the transition to a strong coupling regime for an emitter resonantly coupled to a surface plasmon in a metal–dielectric structure. We demonstrate that the shape of scattering spectra is determined by an interplay of two distinct mechanisms. First is the near-field coupling between the emitter and the plasmon mode which underpins energy exchange between the system components and gives rise to exciton-induced transparency minimum in scattering spectra prior to the transition to a strong coupling regime. The second mechanism is the Fano interference between the plasmon dipole and the plasmon-induced emitter’s dipole as the system interacts with the radiation field. We show that the Fano interference can strongly affect the overall shape of scattering spectra, leading to the inversion of spectral asymmetry that was recently reported in the experiment.

scholarly journals Shift of the collective mode of polarized graphene on a substrate using spin-sensitive response theory

2019 ◽  
Vol 59 (1) ◽  
Author(s):  
Dominik Kreil ◽  
Michaela Haslhofer ◽  
Helga M. Böhm
Keyword(s):  
Collective Mode ◽  
Near Field ◽  
Plasmon Mode ◽  
Charge Carriers ◽  
Semiconductor Heterostructures ◽  
Response Functions ◽  
Interband Transitions ◽  
S Wave ◽  
Minority Spin ◽  
Spin Polarized

The growing precision of optical and scattering experiments necessitates a better understanding of the influence of damping onto the collective mode of sheet electrons. As spin-polarized systems are of particular interest for spintronic applications, we here report spin-sensitive linear response functions of graphene, which give access to chargeand spin-density related excitations. We further calculate the reflectivity of graphene on an SiO2 surface, a setup used in s-wave scanning near-field microscopy. Increasing the partial spin-polarization of the graphene charge carriers leads to a significant broadening and shift of the plasmon mode, due to single-particle interband transitions of the minority spin carriers. We also predict an antiresonance in the longitudinal magnetic response function, similar to that of semiconductor heterostructures.

Magnetic plasmon mode resonance and power transmission in a nanosandwich waveguide

2011 ◽  
Vol 20 (8) ◽  
pp. 087301 ◽  
Author(s):  
Fei-Ya Fu ◽  
Wen-Jun Zhou ◽  
An-Jin Liu ◽  
Wei Chen ◽  
Yu-Fei Wang ◽  
...  
Keyword(s):  
Power Transmission ◽  
Plasmon Mode ◽  
Magnetic Plasmon

Lattice Plasmon Mode Excitation via Near Field Coupling

2021 ◽  
Author(s):  
Yun Lin ◽  
Shuo Shen ◽  
Xiang Gao ◽  
Liancheng Wang
Keyword(s):  
Near Field ◽  
Plasmon Mode ◽  
Field Coupling ◽  
Mode Excitation

Plasmonics: Electromagnetic Energy Transfer and Switching in Nanoparticle Chain-Arrays Below the Diffraction Limit

1999 ◽  
Vol 582 ◽  
Author(s):  
Mark L. Brongersma ◽  
John W. Hartman ◽  
Harry H. Atwater
Keyword(s):  
High Efficiency ◽  
Near Field ◽  
Plasmon Mode ◽  
Electromagnetic Energy ◽  
Metal Particles ◽  
Strong Function ◽  
Bending Radius ◽  
Electrodynamic Interaction ◽  
Sharp Corners ◽  
Group Velocities

ABSTRACTA model is given for the transport of electromagnetic energy through structures that consist of chains of closely spaced metal nanoparticles. This transport relies on the near-field electrodynamic interaction between metal particles that sets up coupled plasmon modes. The model predicts that the propagation is coherent and the group velocities can exceed typical saturation velocities of electrons in semiconductors (≈ 105 m/s). Furthermore, it is shown that in these structures propagation of energy around sharp corners (bending radius << the wavelength of visible light) is possible at high efficiency. This efficiency is a strong function of the frequency and polarization direction of the plasmon mode. The operation of a plasmon switch is modeled, in which plasmon waves can be switched or modulated. Finally, suggestions are given for the choice of metal particle and host material.

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