Encontrados 3 documentos, a visualizar página 1 de 1
Exciton migration in self-assembled dendrite-type fractal superstructures of mo...
Bernardo, César; Belsley, M.; Coutinho, Paulo J. G.; Schellenberg, Peter; Moura, Isabel; Núñez Fernández, Yuriel; Stauber, Tobias; Vasilevskiy, MikhailWe investigated dendrite shaped superstructures made of two different QDs, namely CdSe/ZnS and CdTe. Due to the dense packing of QDs, Förster resonance energy transfer (FRET) may compete with deexcitation, and the specific dendrite shaped structure suggests the possibility of funneling of excitation from the edges of the structure to the center.
Efficient graphene-based photodetector with two cavities
Ferreira, Aires; Peres, N. M. R.; Ribeiro, R. M.; Stauber, TobiasDocumento submetido para revisão pelos pares a publicar em Physical Review B. ; We present an efficient graphene-based photodetector with two Fabri-P\'erot cavities. It is shown that the absorption can reach almost 100% around a given frequency, which is determined by the two-cavity lengths. It is also shown that hysteresis in the absorbance is possible, with the transmittance amplitude of the mirrors working ...
Polaron relaxation in a quantum dot due to anharmonic coupling within a mean-fi...
Stauber, Tobias; Vasilevskiy, MikhailWe study the electronic relaxation in a quantum dot within the polaron approach by focusing on the reversible anharmonic decay of longitudinal optical LO phonons forming the polaron into longitudinalacoustic LA phonons. The coherent coupling between the LO and LA phonons is treated within a mean-field approach.We derive a temperature-dependent interlevel coupling parameter, related to the Grüneisen paramete...
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