Broadband mid-infrared plasmon-polaritons in metallic-dielectric interfaces

2021 ◽  
Author(s):  
Flávio Feres ◽  
Ingrid Barcelos ◽  
Dario Bahamon ◽  
João Levandoski ◽  
Andrea Mancini ◽  
...  
Keyword(s):  
Surface Plasmon Polariton ◽  
Hexagonal Boron Nitride ◽  
Near Field ◽  
Real Space ◽  
Strong Coupling Regime ◽  
General Effect ◽  
Mid Infrared ◽  
Dielectric Interfaces ◽  
Plasmon Polaritons ◽  
Group Velocities

Abstract We report real-space near-field images of mid-infrared (IR) surface plasmon-polariton (SPP) waves in the insulating/metal/insulating (IMI) heterostructure: hexagonal boron nitride/gold/silicon dioxide (hBN/Au/SiO2). The SPPs are observed in the 750 – 1500 cm-1 (~13.3 – ~6.7 μm) range, feature micrometer-sized wavelengths and propagation lengths (LSPP) exceeding 20 μm at room temperature. Comparatively, real-space mapping of SPP waves in the mid-IR has been shown only in graphene, but with nanometer sized-wavelength and LSPP ~ 10 μm at cryogenic temperatures. Interestingly, we show interference between different polariton types in the IMI since the lower momenta SPPs in the metal surface interfere with higher momenta hyperbolic phonon polaritons (HPhP) in the hBN top layer creating SPP-HPhP overlapped waves. In agreement with theory, we quantify momentum and damping governing the SPP waves. Tunability is discussed upon changing the IMI heterostructure. Our theory predicts SPP group velocities reaching 20 % of the light velocity in vacuum and 0.2 – 0.4 ps lifetimes. We further demonstrate that the SPP waves interact with SiO2 and hBN phonons in the strong coupling regime. As a general effect of the metal/dielectric interface, the mid-IR SPP waves can be compelling for fast metal-based plasmonics, whilst their ability to strongly couple to phonons can be further explored for enhanced sensing in the mid-IR.

scholarly journals A New Electro-Optical Switch Modulator Based on the Surface Plasmon Polaritons of Graphene in Mid-Infrared Band

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 89 ◽  
Author(s):  
Ming Cai ◽  
Shulong Wang ◽  
Bo Gao ◽  
Yindi Wang ◽  
Tao Han ◽  
...  
Keyword(s):  
Energy Loss ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Surface Plasmon Polariton ◽  
Modulation Depth ◽  
Optical Switch ◽  
Dielectric Structure ◽  
Infrared Band ◽  
Mid Infrared ◽  
Plasmon Polaritons

In this paper, a new electro-optical switch modulator based on the surface plasmon polaritons of graphene is proposed. An air–graphene-substrate–dielectric structure is adopted in the modulator. In this structure, the graphene is considered as a film of metal whose thickness tends to be infinitesimal. By changing the external voltage, the boundary conditions can be changed to decide whether the surface plasmon polariton waves can be excited in mid-infrared band. Because of this effect, the structure can be used as an electro–optical switch modulator, whose modulation depth is about 100% in theory. Finally, the 3 dB bandwidth (~34 GHz) and the energy loss (36.47 fJ/bit) of the electro–optical switch modulator are given, whose low energy loss is very suitable for engineering applications.

scholarly journals Mapping the near-field spin angular momenta in the structured surface plasmon polariton field

Nanoscale ◽  
2020 ◽  
Vol 12 (25) ◽  
pp. 13674-13679
Author(s):  
C. C. Li ◽  
P. Shi ◽  
L. P. Du ◽  
X. C. Yuan
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Imaging Technique ◽  
Near Field ◽  
Three Dimensional ◽  
Experimental Result ◽  
Spin Component ◽  
Angular Momenta ◽  
Scanning Imaging ◽  
Plasmon Polaritons

An optical spin-resolved scanning imaging technique was proposed by which the normal to the interface spin component of surface plasmon polaritons can be mapped and the three-dimensional spin vector can be reconstructed with the experimental result.

scholarly journals Generation of Bessel Surface Plasmon Polaritons in a Finite-Thickness Metal Film

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
S. N. Kurilkina ◽  
V. N. Belyi ◽  
N. S. Kazak
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Metal Film ◽  
Surface Plasmon Polariton ◽  
Metal Layer ◽  
Near Field ◽  
Finite Thickness ◽  
Experimental Realization ◽  
Analytical Expressions ◽  
Plasmon Polaritons

A theory of generation of low- and high-index Bessel surface plasmon polaritons and their superposition in a metal film of a finite thickness is developed. Correct analytical expressions are obtained for the field of two families of Bessel surface plasmon polariton modes formed inside and outside the metal layer. The intensity distribution near the boundary of the layer has been calculated and analyzed. A scheme for the experimental realization of a superposition of Bessel surface plasmon polaritons is suggested. Our study demonstrates that it is feasible to use the superposition of Bessel surface plasmon polaritons as a virtual tip for near-field optical microscopy with a nanoscale resolution.

scholarly journals Real-space mapping of mid-infrared near-field of Yagi-Uda antenna in the emission mode

2019 ◽  
Vol 27 (4) ◽  
pp. 5884
Author(s):  
Yinxiao Xiang ◽  
Sergiu Amarie ◽  
Wei Cai ◽  
Weiwei Luo ◽  
Wei Wu ◽  
...  
Keyword(s):  
Near Field ◽  
Real Space ◽  
Space Mapping ◽  
Mid Infrared ◽  
Emission Mode

scholarly journals Nanofocusing of acoustic graphene plasmon polaritons for enhancing mid-infrared molecular fingerprints

Nanophotonics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 2089-2095 ◽  
Author(s):  
Kirill V. Voronin ◽  
Unai Aseguinolaza Aguirreche ◽  
Rainer Hillenbrand ◽  
Valentyn S. Volkov ◽  
Pablo Alonso-González ◽  
...  
Keyword(s):  
Cross Sections ◽  
Near Field ◽  
Field Enhancement ◽  
Charge Carriers ◽  
Metallic Surface ◽  
Molecular Fingerprints ◽  
Mid Infrared ◽  
Scattering Cross Sections ◽  
Plasmon Polaritons ◽  
Mode Volume

AbstractMid-infrared (mid-IR) optical spectroscopy of molecules is of large interest in physics, chemistry, and biology. However, probing nanometric volumes of molecules is challenging because of the strong mismatch of their mid-infrared absorption and scattering cross-sections with the free-space wavelength. We suggest overcoming this difficulty by nanofocusing acoustic graphene plasmon polaritons (AGPs) – oscillations of Dirac charge carriers coupled to electromagnetic fields with extremely small wavelengths – using a taper formed by a graphene sheet above a metallic surface. We demonstrate that due to the appreciable field enhancement and mode volume reduction, the nanofocused AGPs can efficiently sense molecular fingerprints in nanometric volumes. We illustrate a possible realistic sensing sсenario based on AGP interferometry performed with a near-field microscope. Our results can open new avenues for designing tiny sensors based on graphene and other 2D polaritonic materials.

scholarly journals Observation of localized magnetic plasmon skyrmions

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Zi-Lan Deng ◽  
Tan Shi ◽  
Alex Krasnok ◽  
Xiangping Li ◽  
Andrea Alù
Keyword(s):  
Near Field ◽  
Real Space ◽  
Wearable Electronics ◽  
Experimental Demonstration ◽  
Spatial Profile ◽  
External Interference ◽  
Flexible Sensors ◽  
And Storage ◽  
Topological Robustness ◽  
Plasmon Polaritons

AbstractOptical skyrmions have recently been constructed by tailoring vectorial near-field distributions through the interference of multiple surface plasmon polaritons, offering promising features for advanced information processing, transport and storage. Here, we provide experimental demonstration of electromagnetic skyrmions based on magnetic localized spoof plasmons (LSP) showing large topological robustness against continuous deformations, without stringent external interference conditions. By directly measuring the spatial profile of all three vectorial magnetic fields, we reveal multiple π-twist target skyrmion configurations mapped to multi-resonant near-equidistant LSP eigenmodes. The real-space skyrmion topology is robust against deformations of the meta-structure, demonstrating flexible skyrmionic textures for arbitrary shapes. The observed magnetic LSP skyrmions pave the way to ultra-compact and robust plasmonic devices, such as flexible sensors, wearable electronics and ultra-compact antennas.

Spectral Control of Near-Field Radiation Through Surface Plasmon Polariton Interference

2013 ◽  
Author(s):  
Daisuke Hirashima ◽  
Katsunori Hanamura
Keyword(s):  
Surface Plasmon ◽  
High Frequency ◽  
Surface Plasmon Polariton ◽  
Radiation Transfer ◽  
Near Field ◽  
Structured Surfaces ◽  
Pillar Array ◽  
Field Radiation ◽  
Spectral Control ◽  
Plasmon Polaritons

Through interference of surface plasmon polaritons (SPPs), near-field radiation transfer between pillar-array-structured surfaces was enhanced compared with that between plane surfaces. Even in nanoscale channels between the pillars, the SPPs could propagate, and then a kind of interference and resonance took place according to the depth of the channel between the pillars. With decreasing pillar height, the frequency at maximum radiation transfer was shifted to the high-frequency side. That is, spectral control of near-field radiation could be achieved using pillar-array-structured surfaces.

scholarly journals Broadband Absorption in Patterned Metal/Weakly-Absorbing-Spacer/Metal with Graded Photonic Super-Crystal

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 114
Author(s):  
Steve Kamau ◽  
Safaa Hassan ◽  
Khadijah Alnasser ◽  
Hualiang Zhang ◽  
Jingbiao Cui ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Near Infrared ◽  
Broadband Absorption ◽  
Au Film ◽  
Fabry Perot ◽  
Absorbing Material ◽  
Multiple Band ◽  
Band Absorption ◽  
Plasmon Polaritons

It is challenging to realize the complete broadband absorption of near-infrared in thin optical devices. In this paper, we studied high light absorption in two devices: a stack of Au-pattern/insulator/Au-film and a stack of Au-pattern/weakly-absorbing-material/Au-film where the Au-pattern was structured in graded photonic super-crystal. We observed multiple-band absorption, including one near 1500 nm, in a stack of Au-pattern/spacer/Au-film. The multiple-band absorption is due to the gap surface plasmon polariton when the spacer thickness is less than 30 nm. Broadband absorption appears in the near-infrared when the insulator spacer is replaced by a weakly absorbing material. E-field intensity was simulated and confirmed the formation of gap surface plasmon polaritons and their coupling with Fabry–Pérot resonance.

scholarly journals Four-dimensional vibrational spectroscopy for nanoscale mapping of phonon dispersion in BN nanotubes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ruishi Qi ◽  
Ning Li ◽  
Jinlong Du ◽  
Ruochen Shi ◽  
Yang Huang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Energy Loss ◽  
Phonon Dispersion ◽  
Hexagonal Boron Nitride ◽  
Real Space ◽  
Boron Nitride Nanotubes ◽  
Detection Sensitivity ◽  
Optical Modes ◽  
Optical And Mechanical Properties ◽  
Energy And Momentum

AbstractDirectly mapping local phonon dispersion in individual nanostructures can advance our understanding of their thermal, optical, and mechanical properties. However, this requires high detection sensitivity and combined spatial, energy and momentum resolutions, thus has been elusive. Here, we demonstrate a four-dimensional electron energy loss spectroscopy technique, and present position-dependent phonon dispersion measurements in individual boron nitride nanotubes. By scanning the electron beam in real space while monitoring both the energy loss and the momentum transfer, we are able to reveal position- and momentum-dependent lattice vibrations at nanometer scale. Our measurements show that the phonon dispersion of multi-walled nanotubes is locally close to hexagonal-boron nitride crystals. Interestingly, acoustic phonons are sensitive to defect scattering, while optical modes are insensitive to small voids. This work not only provides insights into vibrational properties of boron nitride nanotubes, but also demonstrates potential of the developed technique in nanoscale phonon dispersion measurements.

Sign in / Sign up

Export Citation Format

Share Document