Strongly modified four-wave mixing in a coupled semiconductor quantum dot-metal nanoparticle system

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[1] Paspalakis, Emmanuel
[2] 1,Evangelou, Sofia
[3] Kosionis, Spyridon G.
[4] Terzis, Andreas F.
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| 1600年 / American Institute of Physics Inc.卷 / 115期
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We study the four-wave mixing effect in a coupled semiconductor quantum dot-spherical metal nanoparticle structure. Depending on the values of the pump field intensity and frequency; we find that there is a critical distance that changes the form of the spectrum. Above this distance; the four-wave mixing spectrum shows an ordinary three-peaked form and the effect of controlling its magnitude by changing the interparticle distance can be obtained. Below this critical distance; the four-wave mixing spectrum becomes single-peaked; and as the interparticle distance decreases; the spectrum is strongly suppressed. The behavior of the system is explained using the effective Rabi frequency that creates plasmonic metaresonances in the hybrid structure. In addition; the behavior of the effective Rabi frequency is explained via an analytical solution of the density matrix equations. © 2014 AIP Publishing LLC;
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