Room-temperature excitonic absorption in quantum wires

Abstract

We measured absorption spectra of T-shaped quantum wires at room temperature using waveguide-transmission spectroscopy. Strong and narrow room-temperature one-dimensional-exciton absorption peak was observed, which shows peak modal absorption coefficient of 160 cm${}^{-1}$ per 20 wires with $\Gamma$-factor of $4.3\times 10^{-3}$, width of 7.2 meV, and strong polarization anisotropy.

3pages, 3figure, 1table

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