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The heart of the integrated antenna and detector is the matching network between them. In this paper, four type antennas for matching the small impedances of high temperature superconducting terahertz detectors at 650GHz are proposed. And the coupling efficiency has improved for high temperature superconducting YBa2Cu2Ox (YBCO) Josephson junction detector with these antennas. Meanwhile, the array...
We demonstrate a high-sensitive and multi-frequency THz measurement on the biomolecules based on a flexible metamaterial. The sensitivity of our proposed biosensor is finally achieved to be around 0.132 GHz/nm that is much higher than other reported results. The tumor molecules are coated on the metamaterial, and a very large frequency shift is observed, which implies its application in disease detection.
Superconducting niobium nitride (NbN) hot electron bolometer (HEB) detectors consist of a complementary logarithmic-spiral antenna made of gold and an NbN film (bridge) connecting across the antenna's inner terminals have been fabricated and characterized. For its performance as a heterodyne mixer, the system DSB noise temperature of about 500 K and the intermediate frequency (IF) gain bandwidth (GBW)...
Superconducting nanowire single photon detectors with an optical resonant cavity structure are fabricated directly on the single crystal substrate. In order to enhance the photons absorption of incident light and improve system detection efficiency (SDE) efficiently, the structure of SNSPD was designed and optimized using the finite-difference time-domain analysis for different kinds of substrates...
Architectural vulnerabilities in basic analog circuits that can be exploited to embed analog hardware Trojans are identified. Challenges of detecting the presence of analog hardware Trojans are discussed. An example is presented of a simple widely used reference generator that incorporates an embedded analog hardware Trojan that requires no extra circuit components, no area overhead, and that leaves...
The efficiency is one of the most important parameter of single photon detector (SPD). The ideal SPD is expected to have 100% efficiency without false counts (always called dark counts). Improving the efficiency and reducing dark counts are interesting work for both scientific research and practical applications. Superconducting nanowire single photon detector (SNSPD) was intensively developed for...
Effective interface engineering technology in GaN-based insulated-gate heteroj unction transistors are of critical significance to enhance device stability and suppress current collapse. In this paper, we present an interface engineering approach featuring in situ low-damage remote plasma treatment prior to the dielectric deposition, to realize high-performance and high-stability GaN-based metal-insulator-semiconductor...
Green optical networks represent a promising solution for reducing the power consumption of telecom networks. For this reason they attract a lot of interest, and several power‐aware design and provisioning algorithms are available in the literature. These approaches, however, seem to consider power minimization as their only objective. Little or no attention is given to other important network aspects,...
This paper proposes an approach to eliminate redundant images adaptively for Wireless Capsule Endoscopy (WCE) video summarization by considering temporal correlation and feature similarity between adjacent WCE frames. The color and texture features, generated by HSV color histogram model and Gray Level Co-occurrence Matrix, have been taken into account. It is noted that frames from different WCE videos...
The design and development of a wide area protection and emergency control system for application in distribution networks of embedded generation is presented in this paper. The system developed consists of a central unit, and one local unit at each substation of a distribution network. It integrates the functions of monitoring, protection and control. The main control function of the system is to...
This paper reports a simple technology for fabricating high aspect ratio (>10) field emission tips directly in molybdenum substrate by fluorine inductive-coupled-plasma (ICP) etching for the first time. Compared to the traditional Spindt array, the film interface is eliminated, and the device exhibits a low turn-on electric field of 1.21V/µm. Arrays of 1,000,000 tips with 10µm pitch are employed...
This paper first investigates the mechanism of the temperature effects on characteristics of MEMS based electrochemical seismic sensors for linear motion detecting both by numerical simulation and experimental methods. Both the simulation and experimental results indicates that the device sensitivity increases with temperature and the tendency of the device frequency response remains the same under...
This paper reports a compact Fourier transform spectrometer system with a large-stroke electrothermal MEMS mirror and other optical components all integrated on a micro-machined silicon base with the dimension of 2cm×2cm. The overall size of the system is reduced dramatically from the prior work [1]. The linear optical path difference (OPD) scan range is increased to 440µm and the mirror plate tilting...
This paper presents a tubing-free microfluidic wound healing assay to quantify the migration of vascular smooth muscle cells (VSMCs). In this study, gravity was used to generate a laminar flow within microfluidic channels, enabling wound formation of VSMCs in a tubing-free manner. The effects of channel geometries (i.e., variations in channel height and PDMS based channel thickness) and chemokines...
Indium doping of Cz and CCz mono-crystalline silicon has been investigated as a means to reduce lifetime degradation after light soaking in wafers and cells. The lifetime degradation is due to the formation of a metastable boron-oxygen complex (B-O pairs) during incipient carrier injection and is proposed to be the mechanism responsible for light-induced degradation in p-type solar cells doped with...
Increasing circuit density in multilevel back-end-of line (BEOL) interconnects is necessary to improve integrated circuit performance and area scaling. Ultra low-k (ULK) dielectrics are used to minimize capacitance for lower power consumption and better capacitance-resistance (RC) performance. However, these materials pose integration and reliability challenges, which have limited our ability to scale...
By using sidewall electrode technology, both record small functional TiO2 selection device (1 × 5 nm2) and HfO2 based RRAM device (1 × 3 nm2) were for the first time successfully demonstrated in this work, improving the understanding of the switching mechanism in an ultra-small, functional resistive random access memory (RRAM) device. The tunneling based low temperature back-end selection devices...
Microstrike and Electroless conformal seed deposition are low-temperature alternatives to iPVD for filling high aspect ratio vias. In this paper we compare electrochemical and physical measurements of seeds deposited by iPVD, Microstrike and Electroless processes and compare their TSV filling results. Measurement methods include RDE, AFM, SIMS, XRD, FIB and SEM. For iPVD seed, TSV filling performance...
Large magnetoresistance (MR) in non-magnetic semiconductors, especially silicon, the mainstream semiconductor in information technology, attracts a lot of attentions because of its interesting physics and broad applications [1-6]. One pathway to achieve large MR is to utilize the resistance transition resulted from the rectification characteristics of diodes, which is called as diode-assisted MR....
Silicon based Flash memories is the mainstream of the current random access memory (RAM) technique. However, it is close to reach its physical limit for miniaturization. So a few kinds of new RAMs have been proposed such as magnetic RAM (MRAM) [1], phase-change RAM [2] and resistive RAM (RRAM) [3]. RRAM is investigated due to its potential of miniaturization and ultrahigh operation speed. An RRAM...
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