Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3515855
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- Deutsche Forschungsgemeinschaft (DFG) [Sonderforschungsbereich 491]
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We analyze the spin-induced circular polarization dynamics at the threshold of vertical-cavity surface-emitting lasers at room-temperature using a hybrid excitation combining electrically pumping without spin preference and spin-polarized optical injection. After a short pulse of spin-polarized excitation, fast oscillations of the circular polarization degree (CPD) are observed within the relaxation oscillations. A theoretical investigation of this behavior on the basis of a rate equation model shows that these fast oscillations of CPD could be suppressed by means of a reduction of the birefringence of the laser cavity. (C) 2010 American Institute of Physics. [doi:10.1063/1.3515855]
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