Domain inversion is used in a simple fashion to improve significantly the performance of a waveguide electro-optic modulator in z-cut LiNbO(3). The waveguide arms of the Mach-Zehnder interferometer are placed in opposite domain-oriented regions under the same, narrower and more efficient electrode, so that opposite phase shifts (push-pull effect) can still be achieved despite the arms being sub...

The title compound, C(24)BBrF(12)N(6) or Br-F(12)BsubPc (BsubPc is boronsubphtalocyanine), has a bowl-shaped structure with an approximate mol-ecular C(3v) symmetry characteristic of boronsubphthalocyanine compounds. In the crystal, mol-ecules are arranged in one-dimensional columns and the boron-subphthalocyanine units within each column are offset and angled in a bowl-to-ligand packing arrang...

This paper presents a highly sensitive photo-detector array deposited on a glass substrate with an integrated optical filter. The active element is a vertically integrated hydrogenated amorphous silicon photodiode featuring a dark current of less than 1e-10 A/cm for -3V bias voltage and a maximal quantum efficiency of 80% near 580 nm. The prototype was encapsulated and tested optically. It has ...

We examine a model of reduced staggered fermions in three dimensions interacting through an SO(4) invariant four fermion interaction. The model is similar to that considered in a recent paper by Ayyer and Chandrasekharan [1]. We present theoretical arguments and numerical evidence which support the idea that the system develops a mass gap for sufficiently strong four fermi coupling.without prod...

This paper describes the design of a power and data telemetry system intended for biomedical implants. The power generation unit utilizes a voltage quadruple, a novel voltage limiter, a new low-power supply-independent voltage reference and a linear voltage regulator. The ASK demodulator uses a high performance comparator based scheme which can recover modulation indices range from 5% up to 90%...

Experimental results on the temperature-dependent cross-plane thermal conductivity of skutterudite thin films are presented. The films examined include IrSb3, CoSb3, and Ir0.5Co0.5Sb3 single layers, and IrSb3 /CoSb3 superlattices that are grown by pulsed-laser deposition. A differential 3v method is used to measure the cross-plane thermal conductivity of these films from 80 to 300 K. The experi...

A systematic and simple theoretical approach is proposed to analyze true degeneracies and polarized decay patterns of exciton complexes in semiconductor quantum dots. The results provide reliable spectral signatures for efficient symmetry characterization, and predict original features for low C(2v) and high C(3v) symmetries. Excellent agreement with single quantum dot spectroscopy of real pyra...

A new voltage-programmed pixel circuit using soluble-processed organic thin film transistors (OTFTs) for an active matrix organic light emitting diode (AMOLED) is proposed. The proposed circuit is composed of four switching TFTs, one driving TFT and one storage capacitor, which is simulated by HSPICE. The proposed circuit can compensate for the non-uniformity of OLED current caused by the thres...

This paper presents a delta-sigma control loop for a buck-boost dc-dc converter with fractional gains. The charge pump used to convert the input voltage acts as a D/A converter in the loop, and its output ripple is frequency shaped by the loop, which also provides the pulsefrequency modulation needed for the conversion. A test chip realised in a 0.72-μm CMOS process and clocked at 1MHz provided...

Abstract—A low power 8bit 200MSPS analog-to-digital converter (ADC) is described. The prototype ADC achieves low-power consumption by time-interleaved and stage scaling technique. The pipeline stage and amplifier are designed to guarantee the PVT variation with less current. The ADC is implemented in TSMC 0.35um double-poly-triple-metal CMOS technology and achieved 47.7dB signal-to-noise and di...