期刊
MICROMACHINES
卷 13, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/mi13081179
关键词
exciton; phonon; linear susceptibility; graphene nanoribbon nanoresonator; third-order susceptibility
In this study, we investigated the optical properties of a hybrid structure consisting of a semiconductor quantum dot and a doubly clamped suspended graphene nanoribbon nanoresonator. We obtained analytical results for the linear and third-order optical susceptibilities of the hybrid system. The linear susceptibility exhibited a single resonance whose position depended on the on-resonance exciton energy and the exciton-nanoribbon resonator coupling strength coefficient. The third-order optical susceptibility exhibited a sharp resonance at low frequencies determined by the fundamental flexural phonon mode, and a broader resonance at higher frequencies determined by the coupling strength coefficient and exciton frequency, with the amplitude solely dependent on the exciton-photon coupling strength.
We studied the optical properties of a hybrid structure that was composed of a semiconductor quantum dot and a doubly clamped suspended graphene nanoribbon nanoresonator. We obtained analytical results for the linear and third-order optical susceptibilities of the hybrid system. The spectrum of the linear susceptibility exhibited a single resonance, and its position depended on the value of the on-resonance exciton energy and the exciton-nanoribbon resonator coupling strength coefficient; the amplitude of the resonance was independent of the values of these parameters. The third-order optical susceptibility spectrum exhibited a sharp resonance arising at low frequencies of the probe field, the position of which depended only on the frequency of the fundamental flexural phonon mode. It also presented a broader resonance arising at higher frequencies of the probe field, the position of which was determined both by the coupling strength coefficient and by the exciton frequency; its amplitude depended solely on the exciton-photon coupling strength.
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