Table of Contents
Journal of Atomic, Molecular, and Optical Physics
Volume 2011, Article ID 756758, 4 pages
Research Article

Temporal Response of MSM-LED Optical Integrated Device

Radiation Engineering Department, NCRRT, Atomic Energy Authority, 3 Ahmed Alzomor St., 8th Sector, P.O. Box 29, Nasr City, Cairo, Egypt

Received 20 October 2010; Accepted 20 January 2011

Academic Editor: Ali Hussain Reshak

Copyright © 2011 Sh. M. Eladl and M. A. Ashour. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The temporal response of an optical integrated device is theoretically analysed. The device is composed of a Metal-Semiconductor-Metal (MSM) Photodetector and a Light Emitting Diode (LED). The analysis is based on the frequency response of the constituent devices without any optical feedback within the device structure. All expressions describing the frequency response, time response, output derivatives, and rise time are outlined. The results show that the temporal response of MSM detectors is similar to the LED response if the cutoff frequency of the LED is lower than that of MSM, while it is similar to MSM detector if the cutoff frequency of the MSM is lower than that of LED.