Kipp, T. and Petter, K. and Heyn, Christian and Heitmann, Detlef and Schüller, Christian (2008) Broadband emission and low absorption in microdisks with AlGaAs quantum wells. Applied Physics Letters 84 (9; 3 S), p. 1477.
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Other URL: http://link.aip.org/link/?APPLAB/84/1477/1
In microphotoluminescence measurements at room temperature on Al0.2Ga0.8As/Al0.4Ga0.6As multiple quantum well microdisks, we observe a large number of whispering gallery modes in a remarkably broad energy range of about 250 meV. This is in contrast to microdisks containing InGaAs or GaAs quantum wells, where typically only one or two whispering gallery modes are observed, but similar to the behavior of microdisks containing self-organized InAs quantum dots. We conclude that impurity levels below the recombination energy of free electron-hole pairs inside the alloy quantum wells lead to an efficient internal broadband emitter with low absorption.
|Date:||11 June 2008|
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||21 Sep 2009 07:08|
|Last Modified:||20 Jul 2011 21:44|