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

doi:10.1063/1.3515855

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

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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.

Original language	English
Article number	19191114
Number of pages	3
Journal	Applied Physics Letters
Volume	97
Issue number	19
DOIs	https://doi.org/10.1063/1.3515855
Publication status	Published - 8 Nov 2010

Keywords

polarization-dynamics
semiconductor-lasers
injection
fluctuations
noise
mode

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

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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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

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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

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JO - Applied Physics Letters

JF - Applied Physics Letters

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

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