Phys. Rev. B 44, 1353–1356 (1991)Sequential versus coherent tunneling in double-barrier diodes investigated by differential absorption spectroscopyReceived 19 March 1991; published in the issue dated 15 July 1991 We have used differential absorption spectroscopy to measure charge distributions in the quantum wells of several double-barrier diodes. We find that the ratio of the stored charge to the current is not equal to the coherent-state lifetime and is basically insensitive to the amount of scattering. We experimentally demonstrate that phase-breaking collisions take place in our structures by observing the energy distribution of the stored charge in both single- and double-resonance structures. © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.44.1353
DOI:
10.1103/PhysRevB.44.1353
PACS:
73.40.Gk, 73.20.Dx, 73.40.Kp, 78.65.Fa
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