Identification of the source of deficient functioning in LOC laser heterostructures

A. Malag, J. Pfeifer, L. Csontos, Z. Lábadi, Gy Hoffmann

Research output: Contribution to journalArticle

Abstract

In this paper we determine the parameters of LOC type AlGaAs laser heterostructures in order to find the reasons of their deficient functioning. The methods of characterization are as follows:- broad-area laser test; - scanning electron microscopy of selective etched sample; - contact resistance profiling; - optical microscopy of an angle-lapped, anodized sample; - electrochemical C-V profiling. Reasons for relatively high threshold current densities found by the broad-area laser test are suggested. Comparison of results, as well as some advantages and disadvantages of the foregoing methods are discussed. In our case the optical microscopy identifies most clearly the origin of the deficient functioning, the other techniques seem to be inadequate. This result shows the importance of this simple tool for a quick analysis of the LPE grown laser structures.

Original languageEnglish
Pages (from-to)89-100
Number of pages12
JournalActa Physica Hungarica
Volume72
Issue number1
DOIs
Publication statusPublished - Mar 1992

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lab-on-a-chip devices
lasers
microscopy
contact resistance
threshold currents
aluminum gallium arsenides
current density
scanning electron microscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Identification of the source of deficient functioning in LOC laser heterostructures. / Malag, A.; Pfeifer, J.; Csontos, L.; Lábadi, Z.; Hoffmann, Gy.

In: Acta Physica Hungarica, Vol. 72, No. 1, 03.1992, p. 89-100.

Research output: Contribution to journalArticle

Malag, A. ; Pfeifer, J. ; Csontos, L. ; Lábadi, Z. ; Hoffmann, Gy. / Identification of the source of deficient functioning in LOC laser heterostructures. In: Acta Physica Hungarica. 1992 ; Vol. 72, No. 1. pp. 89-100.
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