Spin-controlled LEDs and VCSELs

S. Hövel*, N. C. Gerhardt, C. Brenner, M. R. Hofmann, F. Y. Lo, D. Reuter, A. D. Wieck, E. Schuster, W. Keune

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

16 引文 斯高帕斯(Scopus)

摘要

Two different concepts for transferring spin-optoelectronics to practical room temperature operation devices are explained. First, electrical spin injection in the absence of an external magnetic field and up to room temperature is demonstrated for the first time using Fe/Tb-multilayers as Schottky-injectors on common LED-strucrures. Complete switching of the polarization from one orientation to the opposite is feasible within ±0.3 T. Second, the amplification of spin-information in vertical-cavity surface-emitting lasers (VCSELs) is demonstrated by optical test experiments. The output polarization of the VCSEL is unambiguously controlled by the polarized optical excitation. Furthermore, only a spin polarization degree of 30% for the electrons in the active region is required to generate a 100% polarized emission at room temperature for both pulsed and continuous optical excitation. Finally, we suggest a combination of both concepts in an electrically pumped spin-VCSEL.

原文英語
頁(從 - 到)500-507
頁數8
期刊Physica Status Solidi (A) Applications and Materials Science
204
發行號2
DOIs
出版狀態已發佈 - 2007 2月
對外發佈

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 表面和介面
  • 表面、塗料和薄膜
  • 電氣與電子工程
  • 材料化學

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