Spin-controlled vertical cavity surface-emitting lasers

Stephan Hövel*, Nils C. Gerhardt, Carsten Brenner, Martin R. Hofmann, Fang-Yuh Lo, Dirk Reuter, Andreas D. Wieck, Ellen Schuster, Werner Keune


研究成果: 書貢獻/報告類型會議論文篇章

1 引文 斯高帕斯(Scopus)


The output polarization of an optically pumped InGaAs/GaAs vertical cavity surface-emitting laser (VCSEL) is analyzed at room temperature as a function of the circular input polarization degree. The emission of the VCSEL is unambiguously controlled by the exciting polarization and only 30% of spin-polarized electrons are needed in the active region to generate an output polarization degree of up to 100% at short-pulsed pumping. This testifies that a VCSEL can be used as an effective amplifier for spin information even at room temperature. Measurements with a continuous wave excitation were executed to demonstrate the possibility of spin-amplification by electrical spin-injection in a VCSEL. All measurements were confirmed by a phenomenological spin flip model. Our paper is completed with the introduction of Fe/Tb-Multilayers used for spin injection. These contacts enable spin injection without external magnetic fields, i.e. in remanence. Finally, we suggest a combination of these multilayers with a VCSEL-structure to create the first spin-optoelectronic device working both at room temperature and without external fields.

主出版物標題Semiconductor Lasers and Laser Dynamics II
出版狀態已發佈 - 2006 八月 9
事件Semiconductor Lasers and Laser Dynamics II - Strasbourg, 法国
持續時間: 2006 四月 32006 四月 6


名字Proceedings of SPIE - The International Society for Optical Engineering


其他Semiconductor Lasers and Laser Dynamics II

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程


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