Minimal latency is important for augmented reality systems and teleoperation interfaces as even small increases in latency can affect user performance. Previously, we have developed an augmented reality system that can overlay stereoscopic video streams with computer graphics in order to improve visual communication in training for robot-assisted minimally invasive surgery with da Vinci surgica...

We have studied the influence of structural defects on the spatial variation of radiative and nonradiative recombination in an InGaAs/AlGaAs/GaAs resonant cavity enhanced npn heterojunction phototransistor ~HPT! structure using cathodoluminescence ~CL! and electron beam-induced current ~EBIC! imaging. Absorber layers of InGaAs/GaAs multiple quantum wells ~MQWs! are used to provide the photosens...

Nanotechnology is currently playing a significant role in the development of biosensors. The sensitivity and performance of biosensors improves drastically by incorporating nanomaterials and adopting new signal transduction technologies. With the rapid development of tools and fabrication processes , nanoscale sensors capable of interacting with extremely small molecules have been developed. Th...

We have developed a THz near-field microscope with an ultrahighly sensitive detector, CSIP (charge-sensitive infrared phototransistor). In our microscope, scattered photons by a tungsten probe are collected by an objective of a confocal THz microscope and are finally detected by the CSIP. To suppress the far-field background, the probe vertically modulated and the signal is demodulated the sign...

We are developing a symmetric gain optoelectronic mixer for chirped-AM laser detection and ranging systems (LADAR) operating in the “eye-safe” 1.55 m wavelength range. Signal processing of a chirped-AM LADAR system is simplified if the photodetector in the receiver is used as an optoelectronic mixer (OEM). Adding gain to the optoelectronic mixer allows the following transimpedance amplifier’s ...

Optoelectronic tweezers (OET) have emerged in recent years as a powerful form of optically-induced dielectrophoresis for addressing single cells and trapping individual nanostructures with DMD-based virtual-electrodes. In this technique an alternating electric field is used to induce a dipole within structures of interest while very low-intensity optical images are used to produce local electri...

Bioactive phospholipids (PL), particularly lysophosphatidylcholine (LPC), are being increasingly implicated in the pathogenesis of various acute and chronic inflammatory disorders, particularly those of the airways, while there is emerging evidence that vitamin E may function as a natural antagonist of these lipid mediators of inflammation. The aims of this study were to document the effects of...

Structural analysis demands the localized vibration study of metallic, ceramic and composite structures. This paper reports the design and development of a vibration sensor to measure the instantaneous amplitude and frequency of vibrations of structures over very small-localized surface area. Optical fiber based displacement sensor is extended as a vibration sensor, based on the consideration t...

We describe a new type of magnetic field sensor which is termed an ElectroMechanical Resonant Sensor (EMRS). The key part of this sensor is a small conductive elastic element with low damping rate and therefore a high Q fundamental mode of frequency f1. An AC current is driven through the elastic element which, in the presence of a magnetic field, causes an AC force on the element. When the fre...

In this study, an earphone-type interface named "earable TEMPO" was developed for hands-free operation, wherein the user can control the device by simply pushing the tongue against the roof of the mouth for about one second. This interface can be used to start and stop the music from a portable audio player. The earable TEMPO uses an earphone-type sensor equipped with a light emitting diode (LE...