A study of charge oscillations due to electron-and hole-coherent, and mixing tunnelling in coupled quantum well structures is given. The time-dependent picture of coherent tunnelling of an electron and hole wave packet is obtained by the application of the time-development operator of the time-dependent Schrodinger equation, and the time-dependent Schrodinger equation with the Luttinger Hamiltonian. Detailed physical mechanisms involving resonant coherent tunnelling on electrons, valence-band

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... xing effects on heavy-and light-hole tunnelling, spatial and mixing multiple tunnelling effects, in coupled quantum wells are described. 7