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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 7 — Mar. 26, 2012
  • pp: 8192–8198

Transmission-grating-photomasked transient spin grating and its application to measurement of electron-spin ambipolar diffusion in (110) GaAs quantum wells

Ke Chen, Wenfang Wang, Jingda Wu, D. Schuh, W. Wegscheider, T. Korn, and Tianshu Lai  »View Author Affiliations


Optics Express, Vol. 20, Issue 7, pp. 8192-8198 (2012)
http://dx.doi.org/10.1364/OE.20.008192


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Abstract

A circular dichromatic transient absorption difference spectroscopy of transmission-grating-photomasked transient spin grating is developed and formularized. It is very simple in experimental setup and operation, and has high detection sensitivity. It is applied to measure spin diffusion dynamics and excited electron density dependence of spin ambipolar diffusion coefficient in (110) GaAs quantum wells. It is found that the spin ambipolar diffusion coefficient of (110) and (001) GaAs quantum wells is close to each other, but has an opposite dependence tendency on excited electron density. This spectroscopy is expected to have extensive applicability in the measurement of spin transport.

© 2012 OSA

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(300.1030) Spectroscopy : Absorption
(300.6500) Spectroscopy : Spectroscopy, time-resolved
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors

ToC Category:
Spectroscopy

History
Original Manuscript: February 27, 2012
Manuscript Accepted: March 13, 2012
Published: March 23, 2012

Citation
Ke Chen, Wenfang Wang, Jingda Wu, D. Schuh, W. Wegscheider, T. Korn, and Tianshu Lai, "Transmission-grating-photomasked transient spin grating and its application to measurement of electron-spin ambipolar diffusion in (110) GaAs quantum wells," Opt. Express 20, 8192-8198 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-7-8192


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