Daniel Carvalho

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We investigate experimentally and theoretically the role of group-velocity dispersion and higher-order dispersion on the bandwidth of microresonator-based parametric frequency combs. We show that the comb bandwidth and the power contained in the comb can be tailored for a particular application. Additionally, our results demonstrate that fourth-order(More)
We demonstrate a degenerate parametric oscillator in a silicon nitride microresonator. We use two frequency-detuned pump waves to perform parametric four-wave mixing and operate in the normal group-velocity dispersion regime to produce signal and idler fields that are frequency degenerate. Our theoretical modeling shows that this regime enables generation(More)
The built-in piezoelectric fields in group III-nitrides can act as road blocks on the way to maximizing the efficiency of opto-electronic devices. In order to overcome this limitation, a proper characterization of these fields is necessary. In this work nano-beam electron diffraction in scanning transmission electron microscopy mode has been used to(More)
We apply the cognitive hierarchy model of Camerer, Ho and Chong (2004)—where players have different levels of reasoning—to Huck, Müller and Normann's (2002) discrete version of Hamilton and Slutsky's (1990) action commitment game—a duopoly with endogenous timing of entry. We show that, for empirically reasonable average number of thinking steps, the model(More)
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