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Applied Physics Letters / Volume 69 / Issue 2

Appl. Phys. Lett. 69, 218 (1996); http://dx.doi.org/10.1063/1.117377 (3 pages)

Rapid relaxation of hot carriers in GaAs fractional‐layer superlattice quantum wires

A. Chavez‐Pirson, H. Ando, H. Saito, N. Kobayashi, and H. Kanbe

NTT Basic Research Laboratories, 3‐1 Morinosato Wakamiya, Atsugi‐shi, Kanagawa 243‐01, Japan

(Received 17 October 1995; accepted 13 May 1996)

We measure the hot carrier relaxation in two GaAs quantum wire arrays made from fractional‐layer superlattices (FLS). Using femtosecond optical pump–probe spectroscopy, we measure the differential transmission spectra for various pump–probe time delays from which we determine the carrier thermalization times. Although the two FLS structures have different degrees of one‐dimensional confinement at the band edge, we observe rapid (<2 ps) and efficient carrier relaxation in both cases with no sign of the inhibited relaxation predicted for ideal one‐dimensional structures. We believe that FLS quantum wire structures avoid relaxation bottlenecks because the shape of the FLS confinement potential produces high energy states which are two dimensional in character and which facilitate rapid energy relaxation. © 1996 American Institute of Physics.

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KEYWORDS and PACS

Keywords

GALLIUM ARSENIDES, QUANTUM WIRES, HOT CARRIERS, SUPERLATTICES, LASER SPECTROSCOPY, FS RANGE, THERMALIZATION

PACS

  • 78.47.-p

    Spectroscopy of solid state dynamics

  • 78.66.Fd

    III-V semiconductors

  • 73.50.Gr

    Charge carriers: generation, recombination, lifetime, trapping, mean free paths

  • 73.61.Ey

    III-V semiconductors

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.117377

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

For access to fully linked references, you need to log in.
    A. Chavez-Pirson, H. Ando, H. Saito, and H. Kanbe, Appl. Phys. Lett. 64, 1759 (1994)APPLAB000064000014001759000001.

    H. Bensity, C. M. Sotomayor-Torres, and C. Weisbuch, Phys. Rev. B 44, 10945 (1991).

    I. Vurgaftman, Y. Lam, and J. Singh, Phys. Rev. B 50, 14309 (1994).

    A. C. Maciel, C. Kiener, L. Rota, J. F. Ryan, U. Marti, D. Martin, F. Morier-Gemoud, and F. K. Reinhart, Appl. Phys. Lett. 66, 3039 (1995)APPLAB000066000022003039000001.

    H. Ando, A. Chavez-Pirson, H. Saito, and H. Kanbe, J. Appl. Phys. 77, 3372 (1995)JAPIAU000077000007003372000001.

    A. Chavez-Pirson, H. Ando, H. Saito, and H. Kanbe, Appl. Phys. Lett. 62, 3082 (1993)APPLAB000062000024003082000001.


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