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ErAs:In0.53Ga0.47As superlattice THz emitters are fabricated and characterized at an excitation wavelength of 1.55 μm. Photocurrent-voltage characteristics, carrier lifetimes and bandwidth of the THz output are discussed as a function of the superlattice period.
Vehicle-to-Vehicle and Vehicle-to-Roadside communications are going to become an indispensable part of the modern day automotive experience. For people on the move, vehicular networks can provide critical network connectivity and access to real-time information. Infestations play a vital role in these networks by acting as gateways to the Internet and by extending network connectivity. In this context,...
In an actively Q-switched intracavity Raman laser with a b-cut KLuW crystal as the Raman medium and an Nd:YAG crystal as the gain medium, we got the first to ninth order Stokes wavelengths for the 88 cm-1 Raman shift. The wavelengths included 1074 nm, 1085 nm, 1095 nm, 1105 nm, 1117 nm, 1128 nm, 1140 nm, 1151 nm and 1163 nm.
Tree-augmented naive Bayes (TAN) is a state-of-the-art extension of the naive Bayes, which outperforms naive Bayes, yet at the same time maintains the computational simplicity and robustness that are characteristic of naive Bayes. But TAN classifier was built by the conventional passive learning. The available training samples with actual classes are not enough for passive learning method for modeling...
This paper summarizes the recent efforts on the fabrication of REBCO (RE = Y and rare earth elements) coated conductor with an all fluorine-free chemical solution deposition (CSD) method in the superconductivity R&D center (SRDC) at SWJTU and UNSW. A critical current density, Jc, is over 4 MA/cm2 for YBCO deposited on LaAlO3, over 3 MA/cm2 on SmBiO3 buffered single crystal substrates, and of 1...
The performance of on-chip passives and their application at mm-wave frequencies in two key silicon technologies are presented in this paper. Power and linear combiners designed in advanced 130 nm SiGe-BiCMOS and 65 nm CMOS-SOI are used as demonstrators. Multi-port transformer and shielded-CPW-on-SOI power combiners realize insertion loss as low as 0.5 dB and reflected port to port impedance uniformity...
Silicon technologies are enabling ICs capable of operating at millimeter-wave (mm-wave) frequencies, with advantages in design complexity, functionality and cost compared to III-Vs. The potential for application of deep submicron SiGe-BiCMOS and CMOS-SOI technologies in mm-wave systems is surveyed in this paper. Progress in mm-wave silicon IC development for Gbit/s data rate wireless communication...
Here we report the observation of spin-selective photon emission from a resonantly driven singly charged QD. The relative frequencies of the spin-tagged photons are optically tuned via the spin-selective dynamic Stark effect.
A parallel dispersive finite-difference time-domain (FDTD) method for the modeling of three dimensional (3-D) electromagnetic cloaking structures is presented in this paper. The permittivity and permeability of the cloak are mapped to the Drude dispersion model and taken into account in simulations using a dispersive FDTD method. Numerical simulation results are validated using those obtained from...
A FM-UWB transceiver prototype operating in the 7.2 – 7.7 GHz band based upon 3 full-custom ICs is presented. Receiver sensitivity is −85 dBm for a BER of 10−6 at 62.5 kbps. A range of 15 meters is demonstrated under LOS conditions. Power consumption of a SoC version is estimated at 5 mW for the transmitter and 14 mW for the receiver. Subcarrier FDMA multiple access and robustness to narrowband interference...
Here we report the observation of spin-selective photon emission from a resonantly driven singly charged quantum dot. The relative frequencies of the spin-tagged photons are optically tuned via the spin-selective dynamic Stark effect.
In summary we have demonstrated for the first time the fabrication and characterization of InSb NWFETs. Clear evidence of a small band gap semiconductor with device characteristics consistent with an Eg-value of around 160 meV to 180 meV have been provided using a simple yet novel data analysis. Our data can consistently be explained assuming two distinct regions in the device with one being a gate-independent...
This paper reports a simple fabrication approach to create microstructures in electrospun polymer nanofibers. A collector chip with micropatterned electrodes generates electromechanical energy wells above the substrate, which induce selective patterning of polymer nanofibers on the collecting surface. This work provides a sound technology to interface electrospun nanomaterials to larger scaled structures...
This paper reports a liquid droplet based motion sensing system with advantages of simple fabrication, superior biocompatibility and binary signals. The sensor consists of a dielectric substrate and an array of microelectrodes patterned by surface micromachining techniques. In this sensing system, an ionic droplet behaves as the proof mass which responses to external applied acceleration. A lumped...
A pulsed power generator (PPG-I) with a current of 400 kA in amplitude and 100 ns in pulse width was constructed. The development of X-pinches and the early stages of wire-array Z-pinches were investigated by X-ray backlighting using the X-pinch driven by PPG-I as X-ray source. The plasma explosion and implosion near the cross point of the X-shape wires can be clearly seen from a series of the backlighting...
Living labs provide real-world environments for experimentation with new concepts and concurrent, user-driven innovation. While innovation clearly means practical action, experimentation means scientific research. The paper discusses how such experiments can be designed with scientific rigor, what the research setting implies for the research method and how Web technology can be used for new ways...
In this paper, a novel method to determine the surface roughness-limited mobilities (musr) of electrons and holes in MOSFETs directly from experimental data of MOS interface roughness is proposed and compared with experimental musr with and without bi-axial tensile strain. This method includes the direct evaluation of the scattering potential from the power spectra of Si/SiO2 interface roughness data,...
Here we report the observation of spin-selective photon emission from a resonantly driven singly charged QD. The relative frequencies of the spin-tagged photons are optically tuned via the spin-selective dynamic Stark effect.
This paper reports the use of electrical discharge for fabricating microstructures on electrospun polymer nanofibers. Microchips containing an array of conductive microelectrodes are fabricated. Electrical discharges are induced by applying high electrical voltage to these microelectrodes. The thermal energy generated by the micropatterned discharge arcs elevates the temperature in localized regions...
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