Multiphoton-assisted tunneling, dynamic localization and absolute negative conductance

We report the observation of Absolute Negative Conductance (ANC), multiphoton stimulated emission and dynamical localization in sequential resonant tunneling semiconductor superlattices driven by intense terahertz electric fields. With increasing terahertz field strength the conductance near zero dc...

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Bibliographic Details
Published in:Surface science 1996-01, Vol.361, p.176-180
Main Authors: Keay, B.J., Allen, S.J., Maranowski, K.D., Gossard, A.C., Bhattacharya, U., Rodwell, M.J.W.
Format: Article
Language:English
Subjects:
Photon emission
Quantum effects
Superlattices
Tunneling
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Summary:We report the observation of Absolute Negative Conductance (ANC), multiphoton stimulated emission and dynamical localization in sequential resonant tunneling semiconductor superlattices driven by intense terahertz electric fields. With increasing terahertz field strength the conductance near zero dc bias decreases towards zero and then becomes negative. This is accompanied by new steps and plateaus that are attributed to multiphoton-assisted resonant tunneling between ground states of neighboring quantum wells accompanied by the stimulated emission of a photon.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(96)00370-6