Birefringence controlled room-temperature picosecond spin dynamics close to the threshold of vertical-cavity surface-emitting laser devices

M. Y. Li, H Jahme, H. Soldat, N. C. Gerhardt, M. R. Hofmann, T. Ackemann

Research output: Contribution to journalArticle

44 Citations (Scopus)

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.

LanguageEnglish
Article number19191114
Number of pages3
JournalApplied Physics Letters
Volume97
Issue number19
DOIs
Publication statusPublished - 8 Nov 2010

Fingerprint

spin dynamics
surface emitting lasers
birefringence
circular polarization
cavities
thresholds
room temperature
oscillations
laser cavities
excitation
pumping
injection
pulses

Keywords

  • polarization-dynamics
  • semiconductor-lasers
  • injection
  • fluctuations
  • noise
  • mode

Cite this

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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.",
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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 journalArticle

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AU - Li, M. Y.

AU - Jahme, H

AU - Soldat, H.

AU - Gerhardt, N. C.

AU - Hofmann, M. R.

AU - Ackemann, T.

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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

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KW - fluctuations

KW - noise

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