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Using Parity-time symmetry, we experimentally realize lasing and anti-lasing at the same equency in a single cavity. Because of the time-reversal property, the demonstrated lasing and anti-lasing resonances share common resonant features such as identical frequency dependence, coherent in-phase response and line spectral resolution. Lasing and anti-lasing in a single device offers a new route for...
MONOS-Type nonvolatile memory devices with quantum dots (QDs) as charge-storage layer (CSL) have been investigated for a long time to replace conventional polycrystalline silicon floating gate memory due to the advantages of smaller operating voltage, faster programming/erasing speed, smaller size, better endurance, and increased bit storage density. As the key part, different types of semiconductor...
We demonstrated the enhanced terahertz transmission through superconducting NbN subw ave length hole arrays. The transmission peak value and frequency exhibit thermal tuning behaviors, which can be attributed to the temperature-dependent complex permittivity of superconducting film. The microscopic hybrid wave model was adopted to analyze the role of surface waves in the enhanced transmission theoretically...
A compact laser scanner that scans approximately 90° has been demonstrated, which is enabled by an electrothermal MEMS mirror encapsulated in a 3D printed holder with a curved dome for optical amplification.
In reverberant electromagnetic environments such as reverberation chambers, shielding enclosures, vehicles and buildings, the electromagnetic energy density is often assumed to be uniform and the direction of arrival of electromagnetic waves (Poynting vector) and their polarisation is assumed uniformly distributed. This is the basis of the power balance method for electromagnetic coupling analysis...
DDoS attack is still one of the major threats from Internet. We propose a new technique to mitigate different types of DDoS, combining and taking advantages of both machine learning algorithms and Bloom filter. We use machine learning to extract features of attacks, then use a customized Bloom filter to defend attacks based on selected features. We implemented and tested the performance of the proposed...
Interference between single photons lies at the heart of linear optical quantum computing (LOQC). However, the lack of deterministic single photon sources hinders the large-scale experimental demonstration and its practical applications, as the probability to generate N single photons simultaneously (denoted by N-photon hereafter) decreases exponentially with the increasing number of single photon...
We designed, fabricated, and characterized a metamaterial perfect absorber at terahertz (THz) frequency range utilizing air as the dielectric material. Due to the avoidance of the loss usually introduced by the dielectric material, there was a three times improvement of the quality factor. Also, with metamaterials fabricated on a free-standing silicon nitride membrane, high sensitivity can be achieved...
For beyond 7 nm node BEOL, line resistance (R) is assessed among four metallization schemes: Ru; Co; Cu with TaN/Ru barrier, and Cu with through-cobalt self-forming barrier (tCoSFB) [1]. Line-R vs. linewidth of Cu fine wires with TaN/Ru barrier crosses over with barrier-less Ru and Co wires for beyond-7 nm node dimensions, whereas Cu with tCoSFB remains competitive, with the lowest line R for 7 nm...
This paper presents the fabrication and testing of a novel Electric Cell-substrate Impedance Spectroscopy (ECIS) biosensor. This is the first time when ECIS electrodes were fabricated on a stretchable polydimethylsiloxane (PDMS) substrate and ECIS measurements on mammalian cells exposed to cyclic strain of 4% and 8% were performed. The stretchable ECIS biosensors simulate in vitro the dynamic environment...
This paper highlights a 14nm Analog and RF technology based on a logic FinFET platform for the first time. An optimized RF device layout shows excellent Ft/Fmax of (314GHz/180GHz) and (285GHz/140GHz) for NFET and PFET respectively. A higher PFET RF performance compared to 28nm technology is due to a source/drain stressor mobility improvement. A benefit of better FinFET channel electrostatics can be...
Self-heating effect (SHE) has become a significant concern for device performance, variability and reliability co-optimization due to more confined layout geometry and lower-thermal-conductivity materials adopted in advanced transistor technology, which substantially impacts the integrated circuit (IC)'s design schemes. In this work, a new methodology for evaluation of SHE in both digital and analog...
We report a FPGA-hardware implementation of a novel Hough-transform (HT) architecture. A DE4 platform with a Stratix-IV FPGA device has been applied to synthesize a complete prototype system. Due to parallelization of the voting procedure, XGA videos can be processed with a frame delay of 5.4 ms at an operating frequency of 200MHz. System suitability for detecting road lanes in automotive applications...
Performance of automatic speech recognition (ASR) systems utilizing only acoustic information degrades significantly in noisy environments such as a car cabins. Incorporating audio and visual information together can improve performance in these situations. This work proposes a lip detection and tracking algorithm to serve as a visual front end to an audio-visual automatic speech recognition (AVASR)...
We demonstrate a silicon photonics coherent transceiver in a ball-grid-array package. It can be handled like a conventional surface-mount-technology component, surviving pick-and-place and 260° C reflow. It saves cost, size and provides enhanced thermals and bandwidth.
Major depressive disorder (MDD) is associated with excessive self-focus and a tendency to engage in self-reflection. Women are more inclined to form negative thoughts when facing problems such as social rejection. The neuroimaging studies addressing MDD females are still rare. The medial prefrontal cortex, a central node of anterior default mode network (DMN), plays an important role in the pathophysiology...
Electromigration and resistivity of Cu, Co and Ru on-chip interconnection have been investigated. A similar resistivity size effect increase was observed in Cu, Co, and Ru. The effect of liners and cap, e.g. Ta, Co, Ru and SiCxNyHz, on Cu/interface resistivity was not found to be significant. Multilevel Cu, Co or Ru back-end-of-line interconnects were fabricated using 10 nm node technology wafer processing...
Integrated n-channel MOSFET-MESFET cascode amplifiers have been fabricated using Global Foundries commercial 45nm SOI CMOS process. The cascode architecture combines the enhanced voltage operation of the MESFET (metal-semiconductor field-effect-transistor) with the high frequency capability of the scaled MOSFET. The resulting small-signal amplifiers demonstrate fT = 50GHz when operated with supply...
Co/Cu composite interconnect systems were studied. Since wide Cu lines require a diffusion barrier which is simultaneously applied also to fine Co lines to reduce Co volume fraction, through-Cobalt Self-Formed-Barrier (tCoSFB) was employed to thin down TaN barrier to <1 nm which works as an adhesion layer for Co lines. Line R of fine Co lines was reduced by 30% successfully. The Co/tCoSFB-Cu composite...
Integrated n-channel MOSFET-MESFET cascode amplifiers have been fabricated using Global Foundries commercial 45nm SOI CMOS process. The cascode architecture combines the enhanced voltage operation of the MESFET (metal-semiconductor field-effect-transistor) with the high frequency capability of the scaled MOSFET. The resulting small-signal amplifiers demonstrate ƒT = 50GHz when operated with supply...
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