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Using observer to estimate cylinder pressure is significant for control and engine on-line diagnosis. Aiming to overcome the chattering phenomenon of sliding mode observer, a second-order sliding mode observer is designed based on the engine cylinder pressure model. And then part of the continuous observer injectors are designed to overcome the chattering problem and eliminate the error based on super-twisting...
In this paper, we demonstrate the experimental study of Fano resonance in a microfabricated phononic crystal (PnC) resonator by creating defects on a two-dimensional (2-D) silicon PnC slab. Our experimental results show that for this type of PnC resonator, the local resonance mechanism plays a dominant role in the acoustic wave transmission, rather than the non-resonant propagating mechanism.
This paper explores two low temperature technological developments related to future n-MOSFETs using III–V semiconductors as channel materials. (1). It was found that Yb-GaAs Schottky contact with RTA at 500°C for 30s has good rectifying characteristics, low effective electron barrier height, low sheet resistivity, atomically sharp junction with GaAs. These properties are suitable for source/drain...
This paper summarizes our recent investigations of nano-wire n type tunneling field effect transistor (n-TFET) reliability by experimental measurements and physical analysis [1-3]. Large PBTI and HC degradations which are very different from those in conventional n-MOSFETs were observed. The results are interpreted by different degradation mechanism in TFET.
Two photonic crystal rings of hexagonal lattice are lying transversely and longitudinally in silicon micro-cantilever at the junction of the microcantilever and the substrate. This unique dual nano-ring (DNR) resonator demonstrates channel drop filter characteristics. When DNR is used as sensing element of a microcantilever sensor, the wavelength shift of resonant peak measured at the backward drop...
We investigated photonic crystals based dual nano-ring channel drop filters which are nanomechanically tunable. The backward channel drop mechanism is explained by a proposed model. Resonant peak observed on the free stand device is located 1553.6 nm with quality factor better than 3800 at backward drop port. When this dual nano-ring is integrated at the junction between silicon cantilever and substrate,...
Three-dimensional (3D) integration using through silicon via (TSV) is an emerging technology for integrated circuit designs. 3D integration technology provides numerous opportunities to designers looking for more cost-effective system chip solutions. In addition to stacking homogeneous memory dies, 3D integration technology supports heterogeneous integration of memories, logic, sensors, etc. It eases...
Tunneling n-FET reliability performance is studied for the first time by physical analysis and experimental measurements. (1) A new degradation mechanism by interface trap induced change of tunneling field and current Id is demonstrated. (2) Under PBTI or HC stress, there is a strong peak of vertical electric field Ex at the gate/source overlapping region due to the P+ doping of the source, inducing...
We proposed a novel channel drop filter based on two dimensional (2-D) silicon hexagonal-lattice photonic crystals (PCs). The PC filters consist of hexagonal silicon nano-ring resonator and two terminal waveguides by removing arrays of air cylinders of the same trace arranged in the hexagonal lattice of a silicon thin plate. The effects of the coupling distance between resonator and waveguides are...
A novel nanomechanical cantilever sensor integrated with photonic crystal (PC) resonator is investigated computationally in this study. A U-shaped PC waveguide with a nanocavity resonator located at the edge of a suspended cantilever can be applied to detect cantilever bending in solution. The detection limit of this nanomechanical cantilever sensor operated in water is better than that of the same...
NBTI in pMOSFETs with plasma (PNO) and thermal (TNO) nitrided SiON gate oxides are re-investigated using our newly developed on-the-fly interface trap (OFIT) and fast pulse I-V measurement (FPM) methods. The threshold voltage shift DeltaVTH is quantitatively decomposed into interface trap and oxide charge components. It is found that the interface trap generation under stress follows the power law...
We proposed a novel hexagonal nano-ring resonator based on silicon photonic crystals (PCs) structure. The photonic crystals are consisted of Si PCs structure of air cylinders in hexagonal lattice. We studied the effects of the spacing between hexagonal nano-ring and waveguide. The relation between drop mechanisms and the symmetry resonant modes is also investigated. We demonstrated the manipulation...
Optical nanoelectromechanical systems (NEMS) based cantilever sensor embedded with a nanocavity resonator is investigated in this study. The resonant wavelength of output spectrum is sensitive to the shape of air holes and defect length of the nanocavity resonator. The sensor characteristics of NEMS-cantilevers with various lengths and the same nanocavity structure are studied in air and water.
We present modeling results of a novel nanomechanical cantilever sensor using optical nanocavity resonator. A nanocavity resonator comprises two-hole pairs which are placed along a U-shaped silicon waveguide at the edge of cantilever. The resonant wavelength of output spectrum is sensitive to the shape of air holes and defect length of the nanocavity resonator. The minimum detectable strain, vertical...
For the first time, we developed an on-the-fly method OFIT to measure the interface trap density NIT without recovery during measurement. The OFIT produces the most reliable experimental data of the interface trap generation dynamics under stress and therefore provides a solid ground to check various modeling work. The slope n of tn time evolution of DeltaNIT under stress is temperature dependent,...
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