Compressively strained 2 m GaInAsSb quantum well lasers with large valence band offsets and broadened waveguides display a record characteristic temperature, T0=140 °K for a 4-QW laser and a differential efficiency of 0.74 for a pulsed 2-QW device. The T0 of these antimonide lasers is 65% more than that reported for phosphide-based lasers operating at 2 m wavelength. A room-temperature threshol...

A numerically efficient model for the evaluation of InGaAsP ridge waveguide laser operation at threshold is presented. It includes the treatment of the electrical behaviour of the junction and an 'hybrid' optical waveguide analysis that approximately takes into account the coupling between TE and TM modes at the ridge interfaces. The adopted optical model is slightly more complex than the effec...

We have investigated the threshold current density required for depinning a domain wall from constrictions in NiFe nanowires, which give rise to pinning potentials of fixed amplitude but variable profile. We observed it to vary linearly with the angle of the triangular constriction. These results are reproduced using micromagnetic simulations including the adiabatic and nonadiabatic spin-torque...

Dorsal root ganglion neurons from adult rats (> or = 200 g) were maintained in culture for between 1 and 3 days. Membrane currents generated by large neurons (50-75 microns apparent diameter) were recorded with the whole cell patch-clamp technique. Large neurons generated transient Na+ currents and at least two types of inward current that persisted throughout 200-ms voltage-clamp steps to +20 ...

In this paper the design of a new high-speed current mode BiCMOS logic circuits isproposed. By altering the threshold detector circuit of the conventional current mode logic circuitsand applying the multiple value logic (MVL) approach the number of transistors in basic logicoperators are significantly reduced and hence a reduction of chip area and power dissipation as wellas an increase in spee...

Introduction Implantable cardioverter-defibrillators (ICDs) are considered standard of care for patients with life-threatening cardiac arrhythmias. In small children and patients with venous anatomy that prohibits placement of traditional transvenous leads, nontransvenous coil positions have been used and can be characterized as epicardial, pleural, subcutaneous, or a hybrid of any of the 3 pos...

Abstract Magnetic skyrmions are topologically stable spin swirling particle like entities which appealing for next generation spintronic devices. The expected low critical current density the motion of makes them potential candidates future energy efficient electronic Several heavy metal/ferromagnetic (HM/FM) systems have been explored in past decade to achieve faster skyrmion velocity at densi...