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The effect of current crowding on the electroluminescence of InAs mid-infrared light emitting diodes. .

Research output: Contribution to journalJournal article

Published

Journal publication date03/2004
JournalSemiconductor Science and Technology
Journal number3
Volume19
Number of pages5
Pages480-484
Original languageEnglish

Abstract

It has been observed that current crowding and the position of the ohmic contact can have a significant influence on the electroluminescence of InAs-based mid-infrared light-emitting diodes. The asymmetry in the contact position leads to the appearance of highly directional light emission from the mesa edge and a very strong spectral current tuning behaviour, with a tuning rate as high as 1.0 nm mA(-1) over a tuning range of 180 nm. This effect is due to the current crowding near the edge of the mesa resulting in localized optical gain near the mesa boundary.