Ultrafast all-optical spin polarization switch using quantum-well etalon

Yuji Nishikawa, Atsushi Tackeuchi, Masaomi Yamaguchi, Shunichi Muto, Osamu Wada

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Ultrafast all-optical switch is proposed and demonstrated using picoseconds spin-polarization relaxation in a multiple-quantum-well (MQW) etalon structure. The decay time of the conventional all-optical switching in MQW etalon is restricted by the carrier lifetime, typically in nanoseconds, Using carrier spin relaxation, the polarization change of the probe beam has been demonstrated to be switched with a pulse width of 4 ps and a contrast of 4:1 at a pump pulse energy of 50 fJ/μm2. In the present device, the contrast is determined by the polarization rotation angle of the probe beam, and the polarization-rotation angle has been shown to be proportional to the total well thickness. It is predicted that a contrast can be improved over 13 dB by optimizing the MQW etalon structure, indicating potential applicability to ultrafast optical communication systems. The optimization would improve the transmission from a present value of about 1%.

Original languageEnglish
Pages (from-to)661-667
Number of pages7
JournalIEEE Journal on Selected Topics in Quantum Electronics
Volume2
Issue number3
DOIs
Publication statusPublished - 1996 Sep
Externally publishedYes

Fingerprint

Spin polarization
Light polarization
Semiconductor quantum wells
switches
Switches
quantum wells
Polarization
polarization
Carrier lifetime
Optical switches
Optical communication
probes
Communication systems
optical switching
carrier lifetime
Pumps
optical communication
telecommunication
pulse duration
pumps

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Ultrafast all-optical spin polarization switch using quantum-well etalon. / Nishikawa, Yuji; Tackeuchi, Atsushi; Yamaguchi, Masaomi; Muto, Shunichi; Wada, Osamu.

In: IEEE Journal on Selected Topics in Quantum Electronics, Vol. 2, No. 3, 09.1996, p. 661-667.

Research output: Contribution to journalArticle

Nishikawa, Yuji ; Tackeuchi, Atsushi ; Yamaguchi, Masaomi ; Muto, Shunichi ; Wada, Osamu. / Ultrafast all-optical spin polarization switch using quantum-well etalon. In: IEEE Journal on Selected Topics in Quantum Electronics. 1996 ; Vol. 2, No. 3. pp. 661-667.
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