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Now showing items 121-130 of 132
Ruídos e processos quânticos fundamentais em íons aprisionados e ondas propagantes
(Universidade Federal de São Carlos, 2002-07-22)
In this work we present a proposal protocol for engineering arbitrary motional states of trapped ions.Our scheme is based on both techniques of quantum state sculpture and projection synthesis. Next, we investigate the ...
Deposição e caracterização de filmes finos do sistema Zn(1-x)CoxO obtidos por spray pirólise para aplicação em sensor de ozônio
(Universidade Federal de São Carlos, 2021-04-19)
The current concern about reducing the harmful effects of air pollution on environment and human health requires adequate gas sensors that allow an efficient control and monitoring on a wide range of pollutants. This ...
Development of seminconductor nanowire materials for electronic and photonics applications
(Universidade Federal de São Carlos, 2019-12-05)
The thesis is concerned with study of GaAs nanowires fabricated on Si substrate.
The possibility of growing III-V semiconductor materials directly on silicon in the
form of nanowires is an attractive route to the integration ...
Propriedades ópticas de filmes semicondutores GaAsBi e GaSbBi
(Universidade Federal de São Carlos, 2022-05-02)
Bismuth-diluted III-V are interesting materials for possible applications in optoeletronic and spintronic devices. If we add a small amount of Bi in III-V materials, we observe a strong reduction in the band gap energy. ...
Raman spectroscopy as a reliable tool for strain analysis in iii-nitride superlattices
(Universidade Federal de São Carlos, 2021-09-02)
Since its discovery, the Raman effect has been a great ally in the structural investigation of a wide variety of materials, from macro to nanoscale. However, despite the remarkable sensitivity of techniques based on Raman ...
Engenharia de reservatórios com temperaturas efetivas arbitrárias e máquinas térmicas quânticas para sistemas de spins nucleares
(Universidade Federal de São Carlos, 2021-05-24)
In this work we show how to engineer reservoirs with different effective temperatures for a single qubit (quantum bit) system. To that end, we built an appropriate interaction between a qubit, that is, a 13C nuclear spin, ...
Propriedades óticas e elétricas de dicalcogenetos de metais de transição sobre talco
(Universidade Federal de São Carlos, 2022-02-24)
Two-dimensional (2D) systems have attracted great attention in the last years, for
fundamental physics and in potential applications as optoelectronic devices. There is a great interest in transition metal dichalcogenides ...
Propriedades magnéticas em filmes finos de MoS2 produzidos pelo método de esfoliação em solvente
(Universidade Federal de São Carlos, 2020-09-28)
In this work, thin films of molybdenum disulfide 2D (MoS2) were prepared at different temperatures (15, 25, 30 and 45 ° C) using the solvent exfoliation method. This process produces changes in the morphology and structure ...
Charge carrier dynamics and optoelectronic properties in quantum tunneling heterostructures
(Universidade Federal de São Carlos, 2021-09-17)
Semiconductor quantum tunneling heterostructures offer a wide range of applications as photosensors, lasers, and circuit elements. However, fundamental questions related to energy transfer mechanisms and the correlation ...
Break of reciprocity on the light scattered by a disordered atomic cloud
(Universidade Federal de São Carlos, 2024-03-07)
This study delves into interference phenomena, specifically exploring interference patterns arising from light scattered by a disordered assembly of cold atoms. The investigation focuses on disrupting optical path reciprocity ...