Nanotek & Expo

Biography

Biography: Surik Khudaverdyan

Abstract

Terrorism that makes use of the explosives has turned into an international problem in recent years. Hence, remote detection of the explosives has become a very urgent task.This research studies a portable semiconductor sensor for the remote spectral analysis of the information of the optical signals coming from the vapor and the particles of explosives. The purpose is the identification and the quantitative determination of the signals from explosives.The sensor allows us to carry out the spatial separation and selection of the UV and visible waves of fluorescence with the spectral accuracy of 1 nm. The selection of waves with different absorption depths is carried out via changing the width of the registering area with the help of the step-by-step change of the external voltage applied to the photodetector.Тhe performance characteristics of the existing optical communication systems are analyzed, and a new model of the photo sensor with operating parameters exceeding the existing ones is developed (with the spectral sensitivity of 1 nm, the spectral range of 250 - 1100 nm, the spectrum recording speed of 10-3sec, low price and weight). The methods of the technology, implementation and application of the structure of the new photo sensor are worked out.The interconnection between the selective spectral sensitivity of the photo sensor and the parameters of the structure and of the electromagnetic radiation is studied. It allows us to determine the spectral range of the selective sensitivity and the resolution for observing the biochemical and biophysical processes occurring in dangerous objects and on their surfaces.The block diagram and the accurate algorithm are developed. This allows us to study the possibility of the remote identification of explosives in the objects via numerical simulation.The prototype of the sensor is developed in our laboratories and detailed test of the sensor is conducted along with the comparative analysis.