Abstract
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.
Original language | English |
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Article number | 19191114 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 97 |
Issue number | 19 |
DOIs | |
Publication status | Published - 8 Nov 2010 |
Keywords
- polarization-dynamics
- semiconductor-lasers
- injection
- fluctuations
- noise
- mode