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In this work, antennas utilized for an intra-vehicle 3–11 GHz and 55–65 GHz channel measurement are described. A measurement antenna should not only provide a wide-band impedance bandwidth but also have a stable radiation pattern and a high fidelity factor. For the lower frequency band, a metal conical monopole antenna is proposed for its frequency stable H-plane omnidirectional radiation pattern...
Mounting of the construction element onto the base with two tips in the form of sharpened ends, while the base is supposed to represent the fragment of surrounding surface, is a widely used practice in situation, when calculation or measurement of backscattering pattern of construction element is required. The purpose of the tips introduction is to imitate the mock-up borders placement to infinity...
The paper presents the results of investigation of the thermochemical laser-induced periodic surface structures (TLIPSS) formation on metalls film (Ti, Ni, Cr) at femtosecond irradiation with different spot sizes, pulse powers, polarization directions. Also the results of selective TLIPSS etching for transfer a topology of TLIPSS into metal underlayer are presented.
High-resolution measurement of refractive index has a wide range of application and employment of the plasmon resonance absorption combined with phase detection is a promising way to achieve 8-digit resolution. However, because the phase detection in light-wave frequency is not simple, we would like to report on a method of refractive-index measurement by using efficiency-alone interrogation. The...
We investigate plasmon excitation on the surfaces of a thin metal-film grating, which are sinusoidally modulated with a common period and different initial phases. Employing Yasuura's method of modal expansion, we numerically find the resonance angle, field distribution, power flow in the vicinity of the grating surfaces, and efficiency of propagating orders. By setting the amplitude of the metal-film...
In this talk, we will overview nonlinear plasmonic effects due to intrinsic, hydrodynamic metal nonlinearity, enhanced by sub-wavelength field confinement, interaction between plasmonic resonances and nonlocal effects. In particular, various nonlinear effects, such as nonlinear mode coupling, high-order harmonics and coherent supercontinuum generation will be discussed.
Simulating laser ablation on an atomistic scale is a demanding task which requires millions to billions of atoms for sample sizes in the nano- to micrometer range.
The surface wave modes on right-handed helically grooved metal wire waveguide and left-handed one were studied and compared. It was found that for the helically grooved waveguide, the normal degenerate HE1 SSPP (spoof surface plasmon polaritons) mode decompose into two opposite circularly polarized modes, i.e., HE − 1 and HE + 1 SSPP modes due to the chirality of helical grooves. The divarication...
We propose a reflective linear polarization converter with broadband and high-efficiency using ladder-shaped resonator (LSR) structure metamaterial (MM) based on multi-reflection interference theory. Three resonances generated by LSRs contribute to the expansion of working frequency range while the interference theory is employed to explain the characteristic of high-efficiency polarization conversion...
Recent progress of spatial resolution and precision in two-photon lithography enables us to produce real freestanding three-dimensional polymeric micro-architectures with a spatial resolution below 100 nm. In order for practical micro/nano functional device applications, now the question is if their mechanical rigidity/flexibility of such thin nano-sized polymers produced by laser-induced polymerization...
We experimentally demonstrate the enhancement of the spontaneous emission rate of GaAs quantum wells (QWs) embedded in rolled-up metamaterials. We investigate the spontaneous emission lifetime of semiconductor QW heterostructures which are directly integrated inside rolled-up microtubes (RMTs) with hyperbolic dispersion. RMTs are prepared by self-rolling of strained metal-semiconductor layer systems...
The mode properties of metal-coated nanocylinder resonators are numerically investigated for realizing directional emission. The metal confinement layer not only reduces the radiation loss greatly but also introduces a great metal dissipation loss. The compromise of the metal dissipation loss and the output coupling is investigated accounting the destructive interference of leakage waves. The TE and...
We present a theoretical description of the electromagnetic coupling between a two-level system and the localized modes supported by the most paradigmatic plasmonic cavity: a pair of metallic spheres separated by a nanometric gap. Our method exploits the invariance of Maxwell's Equations under geometric transformations to obtain analytical expressions for the spectral density evaluated in the surroundings...
In this paper, transmission characteristics affected by a relative position between a noise suppression sheet (NSS) placed on a periodic metal film and a transmission line are examined. A microstrip line (MSL) based on IEC standard (IEC62333-2) is fabricated, and transmission characteristics of the MSL placed on two types of NSS are measured.
Graphene, a new optical material behaves like a thin metal film and graphene-plasmonic is a rapidly growing field in physics which combines the electronic and optical properties of graphene with conventional metal plasmonics. In this paper, we steered self-accelerating behavior of Airy plasmons in graphene based waveguide effectively. The (1+1)D solution of Airy plasmons is calculated analytically,...
Frequency selective surfaces (FSSs) are planar structures composed of a periodic array of unit cells that filter electromagnetic (EM) waves impinging on the surfaces. They have been widely used in stealth technology, electromagnetic countermeasure, and communication systems [1, 2]. Typical FSSs are composed of metallic grids or dipole arrays, which exploit the strong interactions between EM waves...
An imaging system is built up to capture the image of terahertz (THz) plasmonic wave. Both amplitude and phase information of the THz plasmonic wave can be achieved with this system. Some plasmonic wave devices are characterized and their functions are demonstrated.
Optical metasurfaces, being the two-dimensional analog of optical metamaterials, have in recent years gained considerable attention due to the possibility to control light on a subwavelength scale in unforeseen ways and the relative ease of fabrication, thus representing viable components for compact real-world applications. In this talk, we will discuss a certain type of plasmonic (i.e., metal-based)...
We present an electromagnetic optimization environment based on full-wave solutions via surface integral equations and the multilevel fast multipole algorithm (MLFMA). Optimizations are performed by using genetic algorithms, while the required trials are performed accurately via MLFMA. The developed mechanism can handle many different operations, such as portion moving/removing, rotation, and gap...
A printed tri-band UHF RFID tag antenna for Monza4 chip which is mountable on metallic surface is proposed with a miniaturized size of 20mm × 35mm × 1.6 mm. A grounded patch is designed to realize the character of mounting the metallic surface. The meander shape lines are used to miniaturise the proposed antenna. To realize three bands, three microstrip parasitic ground lines of different resonance...
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