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This paper addresses an accurate CAD oriented integrated closed-form model for the computation of losses for planar and non-planar slotline on a finite-thickness multilayered dielectric substrates. The analysis of the structures has been done using conformal mapping and single layer reduction (SLR) technique. The validity of the proposed integrated model is tested over wide range of parameters: 1...
Searching for better results, the classic mathematical tools and theorems of dynamic control theory are applied to the analyses of the numeric routine for electrical transients' digital simulations. This numeric routine solves the linear system that represents the π circuits' cascade. So, the differential equations of this system are analyzed using Laplace's transform and, based on these analyses,...
Design and characterization of periodic dielectric or metallic structures such as photonic crystals and plasmonic metamaterials with unique electromagnetic responses have stimulated extensive attention due to the unusual physical phenomena and the potential applications in electromagnetic devices. These artifical materials are based on the original concept of manipulating electromagnetic waves by...
With the continuous growth of internet, mobile and cloud computing services, the network traffic in data centers (DCs) is drastically increasing. According to recent estimates 76% of this traffic exists within the DC itself; hence the DC network should be able to handle huge amounts of data while enabling connectivity of any server-to-server. In the traditional DC network, the widely deployed high-capacity...
There have been extensive research to systematically tailor terahertz (THz) plasmonics structures to support strong resonant modes as platforms for designing practical nano and microscale devices with high efficiency and tunability. Here, using a symmetric four-member assembly of plasmonic vee-shaped structures, we introduce a quadratic, multiresonant plasmonic THz antenna to support significant resonant...
In this paper, we propose a kind of leaky-wave antenna based on spoof surface plasmon polaritons (SPP) along the metallic wire with gradient radial grooves. Coaxial wire, supporting traditional guided waves, is used to feed the proposed structure. The conversion between coaxial wire and SPP waveguide is achieved by the flaring outer conductor of the coaxial wire and gradient radially corrugated inner...
With the development of intelligent broadband optical networks, tunable semiconductor lasers are becoming more and more important for wavelength routing and signal processing. A simple and compact widely tunable laser has recently been developed using half-wave coupled V-cavity. The size of the chip is only about 500 µm×300 µm, and the fabrication process is similar to a simple Fabry-Perot laser....
Intra-datacenter traffic is growing more than 20% a year. In typical datacenters, a large number of top-of-rack switches are interconnected via multi-tier electrical switches. The electrical switches necessitate power-consuming optical-to-electrical (OE) and electrical-to-optical (EO) conversion. In addition, the power consumption increases with the growing traffic. To overcome this problem, optical...
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...
In this paper we propose a design of a reconfigurable Remote Access Unit (RAU) interfacing optical dense wavelength division multiplexed (DWDM) networks with radio communication links. To generate a radio signal the device utilizes a principles of incoherent heterodyne signal upconversion. The proposed RAU is able to operate in a whole optical C-band with 100 GHz spaced channels and can generate radio...
We design and investigate a monolithically integrated wavelength converter based on a tunable V-cavity laser with a Mach-Zehnder interferometer with independent phase control. A 6.25 Gb/s non-return-to-zero conversion has been modeled using time-domain traveling-wave method.
In wireless communication networks, the amplitude, phase, and frequency of a radio-frequency (RF) carrier is modulated to carry data signals. Generally, amplitude-shift keying (ASK), phase-shift keying (PSK) and frequency-shift keying (FSK) are served as the basic digital modulation formats. They are also the fundamental modulation schemes to form advanced modulation formats such as quadrature amplitude...
Thermo-optic effect plays an important role and has been paid intensive attention for realizing switchable/tunable photonic integrated devices. In particular, it is possible to realize energy-efficient thermally switchable/tunable photonic integrated devices on silicon because of the high thermo-optical coefficient of silicon material. Recently we realized silicon-based ultra-broadband low-loss thermo-optic...
The intention of this article is merely to describe the novel design of triple band filter based on multi-mode resonance characteristics of the capacitive loaded coupled cavity resonators. Edge groove cylindrical (EGC) coupled metallic posts are used as resonating elements. Two EGC resonators are embedded in a edge blended rectangular cavity of dimensions 98mm × 49mm × 140 mm. Both input and output...
A simplified one-pot reflux heating synthesis of CdTe quantum dots (QDs) is introduced. As a result, the absorbance of CdTe QDs has a linear dependence on the Te:Cd molar ratio. Both the absorption intensities and the first absorption peaks increase linearly as the reaction time increases. The concentration of as-prepared CdTe QDs increases slower and the photoluminescence brightness decreases when...
If technologies of OAM (orbital angular momentum) modes are feasible for RF communication, it can greatly increase the information transmission capacity. For its applicability in RF area we have to resolve two obstacles of technologies.
The rise of big data and cloud computing applications is driving an explosion in the growth of data centers (DCs), and is already resulting in networking bottlenecks and performance degradation. The size and capacity of DCs are being constrained by the traditional packet-based switching architectures due to high energy consumption.
A novel slot antenna with a thin metasurface (MS) ground is proposed. The MS provides reflection energy cancellation and enlarge radiating aperture simultaneously. Measured results indicate that a 6 dB RCS reduction is realized within the antenna operating band, and the gain increases compared to the reference antenna with metallic ground.
Many interesting wave manipulation devices, including illusion devices, have been proposed and realized by transformation optics. Using illusion devices, an object of arbitrary shape can be made to appear like another object. However, there are substantial limitations in current illusion devices based on transformation optics. Firstly, refractive index must be modulated over a large volume, thus,...
Silicon photonics offers a promising integration platform facilitating chip-scale optical signal processing. We review recent research progress in integrated optical signal processing with silicon platform by employing advanced multi-level modulation formats. Using fabricated silicon waveguides, gratings, couplers, microring resonators, vertical slot waveguides and hybrid plasmonic waveguides, we...
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