We demonstrate, experimentally and theoretically, excitable nanosecond optical pulses in optoelectronic integrated circuits operating at telecommunication wavelengths (1550 nm) comprising a nanoscale double barrier quantum well resonant tunneling diode (RTD) photo-detector driving a laser diode (LD). When perturbed either electrically or optically by an input signal above a certain threshold, t...

The properties of CVD Diamond (CVDD) detectors such as high mobility of charge carriers, radiation hardness, and low dark conductivity provide a detector material, which is suggested to be applied in high intensity heavy-ion beam environments where classical detector devices cannot be operated [1]. In the future FAIR experiments radiation-hard materials with large area will be required for a va...

Understanding the transport of photogenerated charge carriers in semiconductors is crucial for applications photovoltaics, optoelectronics, and photo-detectors. While recent experimental studies using scanning ultrafast electron microscopy (SUEM) have demonstrated that local change secondary emission induced by photoexcitation enables direct visualization photocarrier dynamics space time, origi...

<p>The objective of this work is to simulate a pulse amplitude modulation (PAM) scheme based on in-line semiconductor optical amplifiers for soliton systems. The max. power systems, various bits/symbol PAM schemes after fiber length 100 km, simulated and clarified. In addition the Q factor with SOA injection currents km are also demonstrated in results. total electrical photo-detectors cl...

This article is concerned with a version of photoacoustic computed tomography, that uses line detectors (instead of point-like ones) for the recording of induced acoustical data. The three dimensional imaging problem, consisting in reconstructing the unknown density function from recorded data, is reduced to a series of two dimensional problems: First, the initial data of the two dimensional wa...

A novel SOI (Silicon-On-Insulator) pixel photo detector with full depletion and backgate surface potential pinning is proposed in this paper. The detector greatly increases charge-to-voltage conversion gain while stabilizing the operation of SOI circuits. Low noise and wide dynamic range operations are attained. A double doping technique increasing potential barrier to holes at the surface regi...

This study includes the effect of wafer resistivity and intensity light on topography porous silicon surfaces which produced by photo chemical etching method, results showed that changing led to change porosity, where it found layer be less high value resistivity. 
 Once all wafers have same resistivity's that’s porosity focused.
 The production Nano crystalline structures control the...

Abstract Wavelength shifting fibers are widely used for light collection from scintillation counters, which allow connection of various planes to relatively small photocathodes photodetectors and especially tiny silicon photo-multipliers. In October 2020 Kuraray announced production a new branch faster fibers. We performed comparison the fiber YS-2 mature Y-11. The demonstrated decay time nearl...

In this paper, two suboptimum detectors are proposed for coherent radar signal detection in K-distributed clutter. Assuming certain values for several initial moments of clutter amplitude, the characteristic function of the clutter amplitude is approximated by a limited series. Using the Pade approximation, it is then converted to a rational fraction. Thus, the pdf of the clutter amplitude is o...