Time-response characteristics of a GaAs/AlGaAs modulation-doped Schottky photodetector

Authors

Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman
Carlo Alonzo ⋅ PH National Institute of Physics, University of the Philippines Diliman
Alipio Garcia ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

The time response of a GaAs/AlGaAs modulationdoped schottky photodetector is studied using a mode-locked ~100-fs pulsed laser. The device was mounted on a needle probe assembly and the unbiased photocurrent is measured with a 20 GHz oscilloscope. The instrument-limited transient response is 34 ps. For an average incident power of 20 mW, the estimated quantum efficiency at 8400 Å is 0.0117 A/W.

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Issue

2004: Proceedings of the 22nd Samahang Pisika ng Pilipinas Physics Congress

Twenty five years of promoting diversity in physics
25-27 October 2004, Tagbilaran City, Bohol

Article ID

SPP-2004-PR-04

Section

Plenary Sessions

Published

2004-10-25

How to Cite

[1]

E Estacio, C Alonzo, A Garcia, A Somintac, and A Salvador, Time-response characteristics of a GaAs/AlGaAs modulation-doped Schottky photodetector, Proceedings of the Samahang Pisika ng Pilipinas 22, SPP-2004-PR-04 (2004). URL: https://proceedings.spp-online.org/article/view/SPP-2004-PR-04.