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- W2566070107 abstract "When a semiconductor absorbs light, the resulting electron-hole superposition amounts to a uncontrolled quantum ripple that eventually degenerates into diffusion. If the conformation of these excitonic superpositions could be engineered, though, they would constitute a new means of transporting information and energy. We show that properly designed laser pulses can be used to create such excitonic wave packets. They can be formed with a prescribed speed, direction and spectral make-up that allows them to be selectively passed, rejected or even dissociated using superlattices. Their coherence also provides a handle for manipulation using active, external controls. Energy and information can be conveniently processed and subsequently removed at a distant site by reversing the original procedure to produce a stimulated emission. The ability to create, manage and remove structured excitons comprises the foundation for opto-excitonic circuits with application to a wide range of quantum information, energy and light-flow technologies. The paradigm is demonstrated using both Tight-Binding and Time-Domain Density Functional Theory simulations." @default.
- W2566070107 created "2017-01-06" @default.
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- W2566070107 date "2017-05-22" @default.
- W2566070107 modified "2023-10-14" @default.
- W2566070107 title "Engineering and manipulating exciton wave packets" @default.
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- W2566070107 doi "https://doi.org/10.1103/physrevb.95.195423" @default.
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