Electrically pumped quantum post vertical cavity surface emitting lasers

Kim, Hyochul; Rakher, Matthew T.; Bouwmeester, Dirk; Petroff, Pierre M.
March 2009
Applied Physics Letters;3/30/2009, Vol. 94 Issue 13, p131104
Academic Journal
We demonstrate low threshold electrically pumped lasing in oxide apertured vertical cavity surface emitting lasers with quantum posts (QPs) as the active medium. A lasing threshold current as low as 12 μA is achieved at 7 K and room temperature continuous wave lasing is also demonstrated in the cavities with quality factors of ∼10 000. At low temperature, the QP devices show remarkably lower lasing current thresholds compared to equivalent quantum dot devices.


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