Quantum confined Rydberg excitons in Cu2O nanoparticles

Article

关键词: SIZE QUANTIZATION;    SEMICONDUCTOR;    ABSORPTION;    MICROCRYSTALS;    CRYSTAL;   

DOI  :  10.1103/PhysRevB.103.245426

来源: SCIE

【 摘 要 】

The quantum confinement of Rydberg excitons is an important step towards exploiting their large nonlinearities for quantum applications. We observe Rydberg excitons in natural nanoparticles of Cu2O. We resolve up to the principal quantum number n = 12 in a bulk Cu2O crystal and up to n = 6 in nanoparticles extracted from the same crystal. The exciton transitions in nanoparticles are broadened and their oscillator strengths decrease as alpha n(-4) compared to those in the bulk (decreasing as alpha n(-3)). We explain our results by including the effect of quantum confinement of exciton states in the nanoparticles. Our results provide an understanding of the physics of Cu2O Rydberg excitons in confined dimensions.

【 授权许可】

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