A narrow-band infrared phototransistor s14.8 mmd is designed and realized based on a GaAs/AlGaAs double-layer structure. An isolated island formed from the first quantum well sQWd works as a gate, which is capacitively coupled to the remote two-dimensional electron gas s2DEGd layer working as the source/drain channel. Incident radiation excites the intersubband transition within the isolated QW...

The present work reports on a graphene-like material that is promising for photodetection applications due to its high optical absorption and layer-dependent properties. To date, only narrowband photodetectors have been realized; therefore, extending the working wavelength is becoming more imperative for applications such as high-contrast imaging and remote sensing. In this work, we developed a...

Research has been carried out on the design of a light intensity regulator with remote control incandescent lamps. This study aims to and manufacture controller that can be controlled remotely. research uses Infrared Light Emitting Diode (LED) as transmitter phototransistor module receiver. The results this indicate tool successfully designed made function up distance 300 cm.

Chatter vibrations during machining operations are large-amplitude self-excited vibrations, which result in the loss of physical contact between workpiece and tool. This paper presents an electric sensor, is used to detect cutting noncutting periods operation. The spectrum signal sensor free from environmental noise can be select chatter frequencies as boundary stability approached. detection a...

Custom-designed two-micron phototransistors have been developed using Liquid Phase Epitaxy (LPE), Molecular Beam Epitaxy (MBE) and Metal-Organic Chemical Vapor Deposition (MOCVD) techniques under Laser Risk Reduction Program (LRRP). The devices were characterized in the Detector Characterization Laboratory at NASA Langley Research Center. It appears that the performance of LPEand MBE-grown phot...

Angle dynamic measurements of body joints have become an important parameter to know for sportsmen, physicians and analysts of rehabilitation processes. The development of devices that allows those measurements turns out to be a hard work for biomedical engineers because during the acquisition process the mechanical system usually affects the natural joints movements. Digital goniometers have b...

Phototransistors In article number 2205679, Peiguang Yan, Zhenhua Sun, and co-workers report a near-infrared phototransistor with benign light-irradiance adaptability using vertically stacking graphene/lead sulfide quantum dots/graphene heterojunction as the conductive channel. The dynamic trapping detrapping processes in dot film enable inhabitation or potentiation of photoresponse, based on w...