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Mechanosensing followed by mechanoresponses by cells is well established, but the mechanisms by which mechanical force is converted into biochemical events are poorly understood. Vascular endothelial cells (ECs) exhibit flow- and stretch-dependent responses and are widely used as a model for studying mechanotransduction in mammalian cells. Platelet EC(More)
In this paper, high-speed traveling-wave electroabsorption modulators (TW-EAMs) with strain-compensated InGaAsP multiple quantum wells as the absorption region for analog optical links have been developed. A record-high slope efficiency of 4/V, which is equivalent to a Mach–Zehnder modulator with a of 0.37 V and a high extinction ratio of 30 dB/V have been(More)
We demonstrate a novel type of traveling wave photodetector: “metal–semiconductor–metal traveling-wave photodetecor” (MSM-TWPD). Demonstrated devices were fabricated using low-temperature grown GaAs (LTG-GaAs). In order to achieve high internal quantum efficiency, the narrow spacing between electrodes was fabricated by the self-aligned process without(More)
Wireless location is to determine the position of the mobile station (MS) in wireless communication networks. Due to the measurements with large errors, location schemes give poorer performance in non-line-of-sight (NLOS) environments. This paper illustrates methods to integrate all the available heterogeneous measurements to achieve more accurate location(More)
Highly efficient long wavelength vertical-cavity semiconductor optical amplifiers (VCSOAs) are presented. A carrier confining structure was introduced by etching mesas in the active region. The carrier confinement resulted in increased efficiency and amplifier gain. The efficiency was increased by a factor of 3 as compared to previous devices made from the(More)
In this letter, we demonstrated ultrahigh bandwidth and high output power performances of low-temperature-grown (LTG) GaAs-based metal–semiconductor–metal traveling wave photodetectors (MSM TWPDs) in the long wavelength regime ( 1300 nm). Ultrahigh bandwidth (1.3-ps pulsewidth with 234 GHz transformed 3-dB electrical bandwidth) was achieved with(More)
Vertical cavity surface emitting lasers ~VCSELs! emitting in the 1.55 mm wavelength region are attractive sources for optical networks. Advantages of VCSELs include low power consumption, efficient fiber coupling, and high volume, low cost manufacturing. Transmission at 1.55 mm allows for long distance transmission over optical fiber with low attenuation(More)