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.
| 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 |
Fingerprint
Keywords
- polarization-dynamics
- semiconductor-lasers
- injection
- fluctuations
- noise
- mode
Cite this
}
Birefringence controlled room-temperature picosecond spin dynamics close to the threshold of vertical-cavity surface-emitting laser devices. / Li, M. Y.; Jahme, H; Soldat, H.; Gerhardt, N. C.; Hofmann, M. R.; Ackemann, T.
In: Applied Physics Letters, Vol. 97, No. 19, 19191114, 08.11.2010.Research output: Contribution to journal › Article
TY - JOUR
T1 - Birefringence controlled room-temperature picosecond spin dynamics close to the threshold of vertical-cavity surface-emitting laser devices
AU - Li, M. Y.
AU - Jahme, H
AU - Soldat, H.
AU - Gerhardt, N. C.
AU - Hofmann, M. R.
AU - Ackemann, T.
PY - 2010/11/8
Y1 - 2010/11/8
N2 - 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.
AB - 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.
KW - polarization-dynamics
KW - semiconductor-lasers
KW - injection
KW - fluctuations
KW - noise
KW - mode
UR - http://www.scopus.com/inward/record.url?scp=78249254590&partnerID=8YFLogxK
U2 - 10.1063/1.3515855
DO - 10.1063/1.3515855
M3 - Article
VL - 97
JO - Applied Physics Letters
T2 - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 19
M1 - 19191114
ER -