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We review progress in the design, fabrication and characterisation of hollow core photonic band gap fibres that have led to the production of low-latency data transmission fibres of >10 km length with 200nm bandwidth and losses at the 5dB/km level.
We retrieve the polarizability tensor of infinitely long cylinders under oblique incidence. Despite no inversion symmetry, magneto-electric coupling is predicted, its precise physical origins traced to the difference in scattering of TE and TM polarizations.
A new approach to the design and the realization of a broadband multilayer anti-reflection (AR) coating is proposed in this study. The binominal multi-section transformer is employed to efficiently determine the thickness and the refractive index of each matching layer, while those layers can be further realized by doping different fraction of subwavelength-size silicon powders (for relatively-high-index...
We report a design of small-core, multiple-layer Bragg waveguide for guiding the terahertz (THz) signal using TE01 mode, which is composed of alternating high-index dielectric (HDPE) and low-index dielectric (air). The propagation loss is less than 0.1 dB per centimeter ranging from 0.95 THz to 1.20 THz, which is better than that of the traditional metallic tube. Furthermore, a novel scheme is proposed...
Thanks to its large carrying capacity, excellent insulation property and high mechanical strength, PTFE insulated tubular busbar has been used in a broad range of applications in power station that covers the voltage level from 0.4 kV to 220 kV in China. PTFE has been found to be exposed to a great risk of partial discharge (PD) erosion which is generated due to the presence of defect within the insulation...
Hollow core Photonic Bandgap fibres (HC-PBGFs) are the subject of substantial interest due to their intrinsically low nonlinearity and latency, which represent a substantial advantage over conventional, solid fibres. In this paper, we review recent progress at the ORC towards achieving long lengths of uniform fibre and in particular describe the fabrication of a 11 km long span of HC-PBGF with relatively...
The spread of drugs causes serious problems recently. To enhance people awareness about drugs, several approaches were adopted to deliver anti-drug materials. However, limitations were observed in these approaches. Thus, this study develops a game-based anti-drug system (GADS), which incorporates game-based learning into anti-drug materials. In order to get a complete understanding of whether the...
To strike a balance between optimizing for energy versus performance in data centers is extremely tricky because the workloads are significantly different with varying constraints on performance. This issue is exacerbated with the introduction of MapReduce over and above conventional web applications. In particular, with batch versus interactive MapReduce, e.g., Spark system, data availability and...
This paper presents a digital implementation of a DSP-based digital IEC 61000-4-15 flickermeter. According to the functions and design criteria suggested by IEC, a digital model of the flickermeter is developed and simulated by using Matlab and Code Composer Studio. Then, the developed flickermeter function is applied to perform a series of tests based on IEC Standard 61000-4-15 test procedures to...
Game-based learning systems are popular in educational settings. Using a lot of game elements can increase visual effects but interface might become more complex so that learners may have negative perceptions. Therefore, we conducted an empirical study, where experts and novices use Nielsen's heuristics to evaluate the interface of a game-based learning system. The results suggest that the "undo"...
A photonic scheme to realize multiple microwave frequencies measurement using SBS is proposed. By coarsely/precisely determine the frequency band/frequency, two frequencies measurement with improved precision of < 1MHz is experimentally achieved.
Optical injection locking is used to increase the modulation bandwidth and suppress chirp in a single-channel, single-polarization discrete multi-tone bit-loading-optimized transmitter. Transmission through a hollow-core photonic bandgap fiber with negligible signal degradation and distortion is demonstrated.
We report the fabrication of a record 11km length of photonic bandgap fiber supporting >200nm bandwidth with longitudinally uniform loss of ≈5dB/km at 1560nm and demonstrate error-free, low-latency, direct-detection 10Gbit/s transmission across the entire C-Band.
We present a computational model for predicting the net solar energy conversion efficiency of a single-junction solar cell backed by a solid-state photon upconversion nanostructure. We model the upconversion process using a series of kinetic rate equations to calculate equilibrium populations. We determine the upconversion quantum efficiency (UQE) of the proposed device as a function of intentionally...
In this work, the electron dispersive spectroscopy (EDS) methodology was used to identify the thin stack oxide-nitride oxide (ONO) structure of advanced NAND flash products. By the specific dual silicon drift detectors (SDDs) hardware design and the optimized parameters for data acquisition, the accurate results from a damage-free specimen can be obtained.
High Q-factor is achieved in liquid by using an in-plane swing-mode micro-resonator that is specific-designed with a gas-liquid separated structure. Such a resonator can be used for long-term operation in solution for real-time bio-detection. With design of an anti-leakage narrow ‘hydrophobic-slit’ to protect the resonator still in air for high-Q vibration, while only the sensing-region of the device...
This paper reports, for the first time, a single-chip ovenization of a fully-encapsulated MEMS gyroscope to improve the stability of the scale factor and bias. We use the frequency output of the gyroscope as a thermometer, and, in turn heat the device through an on-chip silicon heater defined in the encapsulation layer. During temperature-controlled operation, the scale factor holds constant and the...
This paper, for the first time, reports the nano-size effect of ZnO nanowire (NW) on reversible sulfuration-desulfuration reaction process. ZnO NWs with diameter of 50nm are recently found to be sulfurated by H2S to form ZnS, which can be latterly desulfurized by ambient oxygen back to ZnO when H2S is removed. This sensing mechanism is different from the widely used conventional one for reductive...
We present models and measurements of lightly-doped and heavily-doped dual ring/dual-bar and double-ended tuning fork (DETF) resonators. Both models and measurements indicate that the Q of these resonators is only slightly impacted by the doping level, despite being dominated by thermoelastic dissipation (TED), which has a strong dependence on doping-dependent material properties. We compare experimental...
This paper reports an integrated poly-silicon sub-micron wire biosensor for multiple biomarker detections in clinical samples. It is fabricated by a commercialized 0.35µm CMOS process node. For the first time, an integrated CMOS biosensor chip is experimentally validated in human whole blood and plasma. In this work, a series of anemia/diabetes biomarkers, such as low-density lipoprotein (LDL), hemoglobin...
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