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In this paper, electric vehicles (EV) are considered as random energy storage devices. For the grid-connected hybrid wind- solar-battery (GCH-WSB) power system, under the premise of ensuring power system reliability, the optimal capacity combination of wind-solar-battery is obtained to achieve the lowest annual total cost. The proposed method takes full advantage of the complementary characteristic...
We have developed a platform-independent software package for designing nanometer scaled device architectures. The Nanolithography Toolbox is applicable to a broad range of design tasks in the fabrication of microscale and nanoscale devices.
We present the study of quantitative 3D refractive index mapping of single cells and intracellular lipid droplets with an Optical Diffractive Tomography system. Intracellular organelles of nucleus and mitochondria are also studied.
We demonstrate the first electrically pumped quantum-dot micro-ring lasers epitaxially grown on (001) silicon. Continuous-wave lasing around 1.3 μm was achieved with ultra-low thresholds as small as 0.6 mA and maximum operation temperatures up to 100°.
We report on the fiber-optic polarization-intensive optical modulator architecture by transferring Al/HfO2/ITO/ HfO2 stack around the core region of the D-fiber. The proposed modulator is capable of offering extinction ratio (ER) as high as 23.71 dB and insertion loss (IL) as low as 1.01 dB for the transverse electric (TE) mode. Concurrently, for transverse magnetic (TM) mode are 23.93 dB and 1.07...
This paper proposes a Current Deadbeat Control (DBC) algorithm for a three-phase 9-cells qZS based Cascaded H-Bridge (CHB) inverter to ensure grid current supply with low THD. The studied topology is considered as a single-stage DC/AC topology having the capability of boosting the DC input voltage with high-quality multilevel AC voltage, independent DC-link voltage compensation, and control of the...
A low-frequency electrical spectrum analysis method is researched for evaluating broadband characteristics of high-speed dual-parallel Mach-Zehnder modulators (DPMZMs) based on dual-frequency modulation and fixed-frequency bias. The method enables the broadband and high-resolution evaluation for the modulation depth and half-wave voltage of a high-speed DPMZM by using a low-frequency photodetector...
InAs/InGaAs quantum dot mode-locked lasers are fabricated and characterized. The modal gain as the saturable absorber voltage (SAV) changes is investigated. The ground state lasing dominates at low SAV, and excited state transition emerges when SAV increases.
The ideality factor of a 2 μm InGaSb/AlGaAsSb quantum well laser is investigated. The total ideality factor comes mainly from the central p-n junction and two metal-semiconductor junctions. It decreases from 4.0 to 3.3 when the temperature is increased from 20 to 80 oC.
An on-wafer and self-calibrated scheme is proposed and demonstrated for self-referenced microwave characterization of a silicon integrated optical transceiver. The proposed self-calibration method enables on-wafer selective extraction of microwave characteristic parameters of high-speed modulators and photodiodes in the integrated optical transceiver, without the need for extra electrical-to-optical...
We demonstrate a flexibly controllable molding of electromagnetic waves by designing magnetic metamaterials and metasrufaces with an array of ferrite rods under a particularly arranged bias magnetic field. The manipulation is accomplished for both the spatially propagating waves and the surface waves confined at the interface. Nonreciprocal properties associated with the magnetic surface plasmon resonance...
Chiral metamirrors can reflect one circularly polarized light without changing its handedness, while almost completely absorb the other, which would have many potential applications in engineering. In this paper, recent progresses of our group on the chiral metamirrors are reviewed. Firstly, we discuss the general method to design the chiral metamirrors under the framework of Jones calculus. The structural...
An RF electromagnetic (EM) characterization of high pulsed voltage electrode is investigated in the present paper. The electrode acts as an electric-or E-field pulse generator for atom probe tomography (APT) application. The proposed electrode device is essentially comprised of a microstrip transmission line (TL) combined with via hole. The challenging prediction of the electrode signal integrity...
An efficient and unconventional modelling approach is established for the investigation of power delivery network (PDN) constituted by a multilayer printed circuit board (PCB) structure. The proposed model is applied to the power integrity (PI) analysis through a PDN structure with power/ground planes, vias and decoupling capacitors. The modelling methodology is based on the tensorial analysis of...
Color filters based on metasurfaces have been widely investigated due to their advantages of high efficiency, flexible transfer characteristics and compactness. Nowadays, most of them have been developed only for controlling color hue and the output of most color filters is fixed, while another two elements of the color, namely saturation and value, are rarely considered. However, color saturation...
The radiation from dipole atoms situated in a general loss-less electromagnetic environment is studied in a fully quantized model by direct factorization of the Hamiltonian. The factorized Hamiltonian feature coupled excitations of the atoms and fields.
We describe low end-to-end latencies of 6.69 ms in the 5G CHARISMA network, that has been optimised for both device and system technologies speed, as well as with its virtualised, hierarchical and distributed, edge-centric architecture, that processes data as near as possible to their source and destination. Such an ultra-high speed 5G network can be utilised in intelligent transport system (ITS)...
An unconventional circuit modelling for 3D multilayer printed circuit board (PCB) is developed. The modelling methodology uses the tensorial analysis of network (TAN) approach. The multilayer PCB TAN model is based on the modified Kron's formalism. This unfamiliar circuit modelling is first time applied to the multilayer PCB interconnect modelling. After the diakoptics analysis of the proof of concept...
In recent years, the use of autonomous undersea vehicles (AUVs) for highly time-critical at-sea operations involving surface ships has received increased attention, magnifying the importance of optimal interception. Finding the optimal route to a moving target is a challenging procedure. In this work, we describe and apply our exact time-optimal path planning methodology and the corresponding software...
Vertical comb drives are critical for electrostatic optical switches and variable optical attenuators (VOAs), but fabricating vertical comb-drives suffers from the difficulty of dealing with the comb-finger misalignment. This paper presents a vertical comb drive design and its micro-fabrication method that can realize self-aligned two-level comb fingers. The self-aligned vertical comb fingers are...
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