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 |
|---|---|
| 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
Cite this
Li, M. Y., Jahme, H., Soldat, H., Gerhardt, N. C., Hofmann, M. R., & Ackemann, T. (2010). Birefringence controlled room-temperature picosecond spin dynamics close to the threshold of vertical-cavity surface-emitting laser devices. Applied Physics Letters, 97(19), [19191114]. https://doi.org/10.1063/1.3515855