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Published on: June 3, 2015
Control of electromagnetically induced grating by surface plasmon and tunneling in a hybrid quantum dot-metal
Yu You1, Yi-Hong Qi1, Yue-Ping Niu1
1Department of Physics, East China University of Science and Technology, Shanghai 200237, People's Republic of China.
Abstract:
We investigate the electromagnetically induced grating (EIG) in a quantum dot-metal nanoparticle (QD-MNP) hybrid system. The EIG can be controlled and improved by the surface plasmon effect and the interdot tunneling effect between quantum dots. By manipulating the tunneling effect and the QD-MNP distance, not only the first-order diffraction intensity of the grating can be efficiently enhanced, but also the EIG can be switched from the absorption grating to the gain grating. Almost two times the first-order diffraction efficiencies can be achieved in the gain gratings compared with the absorption gratings.
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