Optically Detected Tunnelling Between Quantum Wells

S. R. Andrews; R. T. Harley

doi:10.1117/12.940832

11 August 1987 Optically Detected Tunnelling Between Quantum Wells

S. R. Andrews, R. T. Harley

Proceedings Volume 0792, Quantum Well and Superlattice Physics; (1987) https://doi.org/10.1117/12.940832
Event: Advances in Semiconductors and Semiconductor Structures, 1987, Bay Point, FL, United States

Abstract

The low temperature exciton scattering rate in a structure consisting of a series of undoped single GaAs quantum wells of widths 5,10,20 and 80 nm separated by undoped 34 nm A10.3Ga0.7As barriers has been investigated in the frequency domain as a function of electric field. The low temperature n=1 heavy hole homogeneous exciton linewidth studied using a combination of resonant Rayleigh scattering and photoluminescence excitation spectroscopy is found to show dramatic increases, to values in excess of the inhomogeneous width, for certain values of electric field which depend on the particular well being studied. The change in exciton scattering rate is interpreted as being due to resonant tunnelling of carriers between neighbouring wells of different widths as bound states are brought into alignment by the external electric field.

Citation Download Citation

S. R. Andrews and R. T. Harley "Optically Detected Tunnelling Between Quantum Wells", Proc. SPIE 0792, Quantum Well and Superlattice Physics, (11 August 1987); https://doi.org/10.1117/12.940832

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