The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Big Data concerns processing of large volumes of digital data with high velocity and variety. Big Data technologies allow the analysis of data in real time, which is critical for various eScience applications. In order to meet the growing demand of Big Data applications, the infrastructures must be flexible enough to adapt to the characteristics of the applications. Most of the solutions presented...
Semiconductor electronic and optoelectronic materials and devices have experienced very rapid development for more than half a century. However, there still remains a lack of closely lattice-matched materials and substrates suitable for the monolithic integration of various kinds of semiconductor devices on a single chip. A new material platform: II-VI (MgZnCdHg)(SeTe) and III-V (AlGaIn)(PAsSb) semiconductor...
We present a simple device architecture enabled by an effective fabrication process to realize high-Q, ultra-compact microresonators with large free spectral ranges on silicon nitride at visible wavelengths. We demonstrate Qs >60 K for microdisks with radii as small as 2.5 μm.
We present a new approach to super-resolution optical imaging, based on structured illumination in hyperbolic media that support subwavelength optical patterns. The proposed system has planar geometry, offers unlimited field of view, and is robust with respect to optical noise and material losses.
The authors propose a L3 defect photonic crystal nanolaser embedded in flexible medium for nanoscale strain detections. A theoretical optical strain sensitivity of ∼4 nm per ε (1% strain) in the x-direction and ∼3 nm per ε (1% strain) in the y-direction is predicted.
We report on the experimental and theoretical investigation of a new class of terahertz filters based on frequency-selective surfaces patterned on thin foils of the low-loss cyclo-olef n polymer Zeonor. We observe both broad and narrowband resonances, which stem from the FSS response and the coupling to substrate guided modes, respectively. The filtering properties are studied as a function of the...
There is a demand to further improve upon performance parameter of particle detectors for high luminosity applications. Higher breakdown voltage, larger signal, lower leakage current and low noise is the primary requirement for future detectors. We want systematic study and investigate one of the important parameters namely the breakdown voltage and want to achieve optimum result for future detectors...
Infrared (IR) thermal emitters with metal-meshed filter were designed and fabricated using standard 0.18-μm CMOS process. The metal-meshed filters were layout on top of micro heaters, and the substrate under the micro heaters were etched for thermal isolation and enhancing heating efficiency. The chip can be heated up to 530°C, and can generate a power density of 7.81mW/cm2 with a bias of 3V.
The virtual networking embedding (VNE) problem is a core issue in network virtualization. This is also a challenging problem as it contains different kinds of constraints, and its complexity becomes even higher in an online VNE problem with thousands of virtual network (VN) requests. In this paper, we proposed an ant colony system based VNE algorithm, called ACS-VNE, for the online VNE problem. The...
In this work we present a methodology to post-process a large array of a few hundred nanometer thin photonic membranes that were fabricated using complementary metal-oxide-semiconductor (CMOS) technological platform. The post processing results in local removal of the silicon substrate and of the buried oxide (BOX), which provides a free access from both side of the photonic structures. The membranes...
GaN emitters have historically been of hexagonal phase due to natural crystallization. Here we introduce a cubic phase GaN emitter technology that is polarization-free via cointegration on cheap and scalable CMOS-compatible Si(100) substrate.
We report on the monolithic integration of RGB InGaN dot-in-a-wire LEDs on a single chip. The correlated color temperature can be continuously varied in the range of 1900K to 6800K, while maintaining excellent color rendering index capability (CRI>90). Moreover, submicron scale RGB pixels were demonstrated.
Technological results about low temperature epitaxial deposition of GaN layers on LTCC substrates are reported. Epitaxial growths of GaN layers have been performed on commercially available LTCC substrates at 540 °C. Pre-growth preparations of the LTCC substrates has been carried out by aluminum oxide buffering layers on the LTCC surface. Further depositions have been performed in an epitaxial reactor...
This paper proposes a compact circularly-polarized (CP) Substrate Integrated Waveguide (SIW) cavity antenna for 5G application operating in 28 GHz band. The antenna consists of a patch with perpendicular-arrows-shaped on a SIW structure. Longitudinal slot etched on the SIW top metallic surface are also used to excite the radiator. The CP radiation is obtained by using a three-quarters-circle-shape...
In this paper, two monopole antenna structures called by the authors as “Hello 1” and “Hello 2” have been designed based on screen printing technology on the flexible paper substrate of 210-um thickness to cover very wide frequency range focusing on two WLAN bands. The designed antennas have the dimensions of 42 × 28 mm2 with the return loss of over 20 dB for “Hello 1”, and over 25 dB for “Hello 2”...
We present a TCAD process and analytical model based simulation analysis to investigate the effect of different stressors on nanowire FETs. We have utilized stress profiles extracted from TCAD process simulations and calculated mobility enhancement using the second-order piezoresistive model. Our analysis includes strained CESL and strained gate fill material for a gate-last process. Our process simulations...
It has been carried out the experimental studies of the process of cadmium telluride magnetron sputtering with direct current, and the impact of a magnetron sputtering mode on CdTe films crystalline structure. In order to create thin-film solar cells based on cadmium sulfide and telluride CdTe films for the base layers of thin film solar cells was obtained on flexible polyimide substrates by magnetron...
A 6-layer continuous and uniform MoS2 film is successfully grown by thermal chemical vapor deposition (CVD) through optimizing its growth conditions, and is used as channel material to fabricate top-gated transistors by conventional lithography process. Also, the effects of a buffer layer on the electrical performance of the CVD MoS2 transistor are investigated, and enhanced carrier mobility (0.69...
This paper proposes an improved KNN algorithm to overcome the class overlapping problem when the class distribution is skewed. Different from the conventional KNN algorithm, it not only finds out the k nearest neighbors of each sample (even the test object itself) in the training dataset, but also the neighbors of the unknown test object. Then the validity value of a data point is computed based on...
This paper, present the resonant and the radiation characteristics of superconducting rectangular microstrip antenna printed on uniaxailly anisotropic substrate using an electromagnetic approach based on cavity model in conjunction with electromagnetic knowledge. The cavity model combined with London's equations and the Gorter-Casimir two-fluid model has been improved to investigate the resonant characteristics...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.