Strong photo-absorption by a single quantum wire in waveguide-transmission spectroscopy
classification
❄️ cond-mat.other
keywords
absorptionsinglequantumspectroscopywaveguidewaveguide-transmissionwirecoefficient
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We measured the absorption spectrum of a single T-shaped, 14x6 nm lateral-sized quantum wire embedded in an optical waveguide using waveguide-transmission spectroscopy at 5 K. In spite of its small volume, the one-dimensional-exciton ground state shows a large absorption coefficient of 80 /cm, or a 98 % absorption probability for a single pass of the 500-um-long waveguide.
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