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- W2891731857 abstract "We study the coherent dynamics of localized excitons in 100 periods of 2.5-nm-thick (In,Ga)N/GaN quantum wells with 7.5% indium concentration, measured with spectroscopic resolution through two-pulse and three-pulse photon echoes at the temperature of 1.5 K. A long-lived coherent exciton dynamics is observed in the (In,Ga)N quantum wells: When the laser photon energy is tuned across the 43-meV-wide inhomogeneously broadened resonance line, the coherence time ${T}_{2}$ varies between 45 and 255 ps, increasing with stronger exciton localization. The corresponding narrow homogeneous linewidths ranging from 5.2 to $29phantom{rule{0.28em}{0ex}}ensuremath{mu}mathrm{eV}$ as well as the relatively weak exciton-phonon interaction $(0.7phantom{rule{0.28em}{0ex}}ensuremath{mu}mathrm{eV}/mathrm{K})$ confirm a strong, quantum-dot-like exciton localization in a static disordered potential inside the (In,Ga)N quantum well layers." @default.
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- W2891731857 date "2018-11-29" @default.
- W2891731857 modified "2023-10-02" @default.
- W2891731857 title "Long coherent dynamics of localized excitons in (In,Ga)N/GaN quantum wells" @default.
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- W2891731857 doi "https://doi.org/10.1103/physrevb.98.195315" @default.
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