Thermal analysis of InAs quantum dot laser diodes with an additional au layer on p-metal

Jung Hwa Jung, Hyun Jae Kim, Kyoung Chan Kim, Jung Il Lee, Il Ki Han

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2 Citations (Scopus)


The thermal characteristics of laser diodes (LDs) are analyzed by using a finite element method. A change in the junction temperature depending on the thickness of the additional Au layer, which might be deposited or plated on the p-contact metal of the LD, has been observed. As the Au layer thickness increases, the junction temperature of the LDs, which are epi-up mounted on a Cu sub-mount, goes down drastically and then saturates. On the other hand, the junction temperature of LDs epi-down mounted on a Cu sub-mount shows relatively little variation with the Au thickness, although it is lowered by more than 30 °C at an electrical input power of 1.2 W compared to that of epi-up mounted LDs. We measure the junction temperatures of InAs quantum dot (QD) LDs and compare them with simulation results. The junction temperatures increased at a rate of 86 °C/W and 48 °C/W for epi-up and epi-down mounting with an additional Au layer of 0.2 μm, respectively.

Original languageEnglish
Pages (from-to)1936-1941
Number of pages6
JournalJournal of the Korean Physical Society
Issue number6
Publication statusPublished - 2007 Jun

Bibliographical note

Funding Information:
This study was supported by a grant from the Yonsei Health Coaching project funded by the Ministry of Health and Welfare (2008).

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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