All-optical picosecond switching of a quantum well etalon using spin-polarization relaxation

Yuji Nishikawa, Atsushi Tackeuchi, Satoshi Nakamura, Shunichi Muto, Naoki Yokoyama

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

All-optical picosecond gate operation is demonstrated using the spin relaxation in a quantum well etalon. Electron spin-polarization photoexcited by circularly polarized light in GaAs quantum wells decays in picoseconds. With the use of the spin relaxation in a quantum well etalon, all-optical full switching is achieved with a decay time of as fast as 7 ps, by adopting a simple optical differential method, which uses only a quarter-wave plate and a polarizer in addition to the conventional all-optical switching setup.

Original languageEnglish
Number of pages1
JournalApplied Physics Letters
DOIs
Publication statusPublished - 1995 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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