Premium
Quantum Control of Electron Transfer
Author(s) -
Tsujino S.,
Rüfenacht M.,
Miranda P.,
Allen S.J.,
Tamborenea P.,
Schoenfeld W.,
Herold G.,
Lupke G.,
Lundstrom T.,
Petroff P.,
Metiu H.,
Moses D.
Publication year - 2000
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200009)221:1<391::aid-pssb391>3.0.co;2-m
Subject(s) - femtosecond , photon upconversion , infrared , electron , luminescence , electron transfer , quantum well , excitation , physics , atomic physics , materials science , optoelectronics , optics , chemistry , laser , organic chemistry , quantum mechanics
We explore electron transfer in double quantum well structures induced by femtosecond mid‐infrared intersubband excitation. Spatial transfer of electrons from one quantum well to its hole filled neighbor is detected by recombination luminescence. The process results in upconversion of the mid‐infrared exciting light to near‐infrared luminescence. Two mid‐infrared pulses with variable time delay allow us to display the field and intensity autocorrelation function for the upconverted signal and measure the electron transfer dynamics. Electron transfer between two GaAs quantum wells separated by 300 nm can be saturated and the intensity autocorrelation function exhibits a slow 18 ps recovery. Transfer between wells separated by only 25 nm is coherently controlled by the phase of the two collinear infrared pulses.