we have simulated the carrier concentration and temporal response characteristics of a back-gated metal- semiconductor-metal (bg-msm) photodetector in one dimension as a function of optical pulse position on the active region in an equilibrium condition (without bias voltage to the photodetector). we have adopted a nonlinear ambipolar transport model to simulate the behavior of photo-generated ...

Micro-rod YAG single crystals are the preferred laser for gain mediums with a high power. However, brittle fracture and crack damages easy to occur in grinding process of micro-rod due their large length-to-diameter ratio, brittleness, hardness. In this work, modal, frequency, harmonic response transducer under ultrasonic elliptical vibration analyzed by using finite element simulation. Then, m...

Abstract The formation of amyloid fibrils various amyloidogenic proteins is dramatically enhanced by ultrasound irradiation. To apply this phenomenon to the study protein aggregation science and diagnosis neurodegenerative diseases, a multichannel irradiation system with individually adjustable conditions necessary. Here, we develop sonochemical reaction system, where an ultrasonic transducer p...

We propose and demonstrate an optical voltage sensing scheme based on a macrobending optical fiber in a ratiometric power measurement system. This novel approach to sensing has not been utilized before and has the advantage that the sensor involves simple fabrication compared to existing fiberoptic voltage sensors. To prove the feasibility of such a fiber-optic sensor, a sensor for a voltage ra...

The mfluence of optical radlatlon on the MOSFET threshold voltage has been mvestlgated theoretically as well as experimentally For conventlonal MOSFETs the influence 1s neghglble, but for open-gate FET-based sensors, such as the ISFET, optIcal radiation can cause a considerable threshold voltage shift An explanation of the threshold voltage shrft due to lllummatlon 1s given, based on the analys...

Transducers for ultrasonic sensing and measurement are often operated with a short burst signal, example few cycles at specific excitation voltage frequency on the generating transducer. The vibration response of narrowband transducer in detection is usually dominated by resonant ringing, severely affecting its ability to detect two or more signals arriving receiver similar times. Prior researc...

Abstract The technology of digital interface compatible electronic transducer is studied. measuring and protective equipment explored to make a new application current voltage signals from the so that differential signal directly used as protection input. principle based on input put forward. And theoretical analysis simulation shows principles proposed are feasible.

We explore a method for laser cooling and optical detection of excitations in a room temperature LC electrical circuit. Our approach uses a nanomechanical oscillator as a transducer between optical and electronic excitations. An experimentally feasible system with the oscillator capacitively coupled to the LC and at the same time interacting with light via an optomechanical force is shown to pr...

background x-ray, is one of the oldest, and yet the most widely used form of medical photographing. x-ray is a valuable tool to diagnose and examine many diseases such as arthritis, spinal injuries, pneumonia, bronchitis and even cancer. running a quality control program of the radiology devices can reduce the absorbed dose in the patients. the aim of this study is to take the quality control t...