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A tunable surface plasmon resonance (SPR) structure driven by microelectromechanical system (MEMS) is proposed and analyzed in this work. The MEMS isotropically expands the suspended SPR structures of nanometer metal disks scattered on a polydimethylsiloxane (PDMS) diaphragm, to different extents on the xy-plane; filtering the incident white light into various colors under control of applied voltage...
Optical modulators are central to a large number of applications in photonics particularly in the area of communication as they provide the function of writing electrical data onto an optical carrier. Silicon photonics provides a route to the realisation of low cost photonic integrated circuits through fabrication which is synonymous with CMOS electronic fabrication, i.e., high volume and high yield...
In the short period of time since Lyme disease was first described in the mid-1970 s, it has rapidly become recognized as the most common vector-borne illness in the United States. In 1982, the Centers for Disease Control and Prevention (CDC) began surveillance of Lyme disease, and the CSTE (Council of State and Territorial Epidemiologists) classified Lyme disease as a notifiable disease in 1990.
This paper proposed Interacting Multiple Model EKF (IMM-EKF) for estimating the angular speed and rotor position of surface-mounted PMS motor in presence of wide range of process and measurement noises. In this algorithm, four IMM-EKF groups are built based on different noise levels. Appropriate model is selected by a switch function, which get good performance at stable state and robust ability....
We report the first silicon integrated graphene optical electro-absorption modulator capable of 10Gb/s modulation speed. We demonstrate low insertion loss and low drive voltage combined with broadband and athermal operation in a compact hybrid graphene-Si device, outperforming Si(Ge) optical modulators for future chip-level optical interconnect application.
Intelligent Guards against Disasters (iGaDs) are devices and applications deployed pervasively in future smart homes and environments. By receiving and processing standard-based machine-readable disaster alert messages from authorized senders and taking appropriate actions in response, they aim to help us better cope with natural disasters. The focus of this paper is on responsive delivery of alert...
There are now many research groups employing fluoride fibre in fibre lasers designed for high power emission at emission wavelengths in the 3 μm region and beyond. To create efficient and therefore high power output from fluoride-based fibre lasers our research group has explored a number of options. In this presentation, I will discuss these methods and offer some general rules-of-thumb that are...
A high sensitivity photonic temperature sensor based on silicon eye-like microring resonator system (EMRS) is reported. The results show great enhancement of the sensing performance by using the EMRS configuration.
We demonstrated an integrated InP high-power dual pair balanced uni-traveling carrier photo-detector. Each pair delivers over 1 W of RF output power into a 50 Ω load at 2 GHz which is 6 dB higher than a discrete diode of the same junction diameter. The responsivity is 0.65 A/W and the common mode rejection ratio of the balanced diode pair was measured to be greater than 40 dB. The OIP3 was measured...
We developed a single-chip InP coherent receiver for detection of PDM-QPSK signals, which meets specifications for 100G between 1530 and 1570 nm. Integration includes a mode converter for efficient coupling from an SMF array.
We demonstrated a high-power balanced photo-detector with over 1 W of RF output power at 2 GHz and OIP3 of 48 dBm at room temperature. Responsivity is 0.65 A/W and CMRR > 40 dB.
This paper presents a Harmonic + Noise Model (HNM)-based voice conversion technique under a Hidden Markov Model-Weighted Deviation Linear Transformation (HMM-WDLT) framework. In a comparative study of four methods of converting the extracted line spectral frequency (LSF) parameters of one speaker to another, the HMM-WDLT achieves the lowest average spectral distortion. A remedial process is developed...
Standing from the coupled mode theory, by utilizing the time-domain transfer matrix method, the bistable switching and dynamic characteristics of nonlinear Bragg gratings (NLBG) can be analyzed numerically. The results show: under steady case, various tapered factor has a different effect on the threshold switching energy and also positive and negative taper can cause the response of optical isolator...
Surface nanomechanical properties of ZrN and ZrCN films deposited on NiTi shape memory alloy (SMA) by magnetron sputtering were investigated by nanoindentation study. And their surface deformation mechanism under nanoindentation load was also proposed and discussed by comparison with that of the electropolished NiTi SMA.
We propose a multiphase region-based framework for image segmentation using Least Square Method, by piecewise constant optimal approximations. The basic idea of our model is to build up a minimum error functional by approximating n sub-regions of the original image with n constants respectively. The main contribution of our method is that we introduce weighting matrixes into the region-based model,...
This study calculated the stresses and deformations of the acrylic tanks used in neutrino experiment under dynamic loads and evaluated the safety level of those tanks. The diameters of those large t tanks are ??3m and the thickness of their walls are only 10mm. The measured mechanical properties are: EB=2.95GPa ??8%, SY=77.92 ??7%, SU= 102.13MPa ??12%. The stress distributions of the tanks were simulated...
BESIII (BEijing Spectrometer III) has finished the installation of all the sub-detector components and starts the data taking. BEPCII achieved a luminosity of 3 ?? 1032 cm-2 s-1 and BESIII has accumulated 100M ??' and 200M J/?? events. BESIII performances so far reached reported.
Summary form only given: Plasma immersion ion implantation (PIII) is an effective method to modify the mechanical properties and chemical properties of materials, especially metals. In comparison with conventional ion implantation, PIII can treat samples with complicated shape due to its non-line-of-sight characteristics. The improved mechanical properties can usually be attributed to radiation-enhanced...
A Blue-ray Disc (BD) player, back-end SoC supporting multiple protection, video and display formats is fabricated in a 90 nm 1P7M CMOS process with a core area of 62.95 mm2. This SoC adopts a general copy protection (GCP) unit to integrate various kinds of protection algorithms (e.g. AES, CSS, CPPM/CPRM, DES, SHA-1/MD5), designs a dedicated memory management unit (MMU) for realizing multiple video...
Ultrafast optoelectronic devices are useful in prescribing fast microwave and millimeter-wave waveforms of wide bandwidth and precision. An integrated InP PIC will be illustrated to demonstrate agile arbitrary waveform synthesis at time domain.
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