Volume 103, Number 5, September 2013
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||20 September 2013|
Double-pulse deexcitations in a one-dimensional strongly correlated system
1 Yukawa Institute for Theoretical Physics, Kyoto University - Kyoto, 606-8502, Japan
2 Center for Interdisciplinary Studies & Key Laboratory for Magnetism and Magnetic Materials of the MoE, Lanzhou University - Lanzhou 730000, China
3 Faculty of Mathematics and Physics, University of Ljubljana - SI-1000 Ljubljana, Slovenia, EU
4 J. Stefan Institute - SI-1000 Ljubljana, Slovenia, EU
Received: 24 June 2013
Accepted: 28 August 2013
We investigate the ultrafast optical response of the one-dimensional half-filled extended Hubbard model exposed to two successive laser pulses. By using the time-dependent Lanczos method, we find that following the first pulse, the excitation and deexcitation process between the ground state and excitonic states can be precisely controlled by the relative temporal displacement of the pulses. The underlying physics can be understood in terms of a modified Rabi model. Our simulations clearly demonstrate the controllability of ultrafast transition between excited and deexcited phases in strongly correlated electron systems.
PACS: 78.47.J- – Ultrafast spectroscopy (<1 psec) / 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 78.20.Bh – Theory, models, and numerical simulation
© EPLA, 2013
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