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Your search keyword '"Andrade, I. C."' showing total 9 results
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9 results on '"Andrade, I. C."'

1. Coexistence of weak and strong coupling with a quantum dot in a photonic molecule

Author

Lichtmannecker, S., Kaniber, M., Echeverri-Arteaga, S., Andrade, I. C., Ruiz-Rivas, J., Reichert, T., Becker, M., Blauth, M., Reithmaier, G., Ardelt, P. L., Bichler, M., Gómez, E. A., Vinck-Posada, H., del Valle, E., and Finley, J. J.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We study the emission from a molecular photonic cavity formed by two proximal photonic crystal defect cavities containing a small number (<3) of In(Ga)As quantum dots. Under strong excitation we observe photoluminescence from the bonding and antibonding modes in excellent agreement with expectations from numerical simulations. Power dependent measurements reveal an unexpected peak, emerging at an energy between the bonding and antibonding modes of the molecule. Temperature dependent measurements show that this unexpected feature is photonic in origin. Time-resolved measurements show the emergent peak exhibits a lifetime $\tau_M=0.75 \, \pm 0.1 \, ns $, similar to both bonding and antibonding coupled modes. Comparison of experimental results with theoretical expectations reveal that this new feature arises from a coexistence of weak- and strong-coupling, due to the molecule emitting in an environment whose configuration permits or, on the contrary, impedes its strong-coupling. This scenario is reproduced theoretically for our particular geometry with a master equation reduced to the key ingredients of its dynamics. Excellent qualitative agreement is obtained between experiment and theory, showing how solid-state cavity QED can reveal new regimes of light-matter interaction.

Published
2018

6. DO PARADIGMA ASSISTENCIAL AO PARADIGMA DO DESENVOLVIMENTO INTEGRAL DA CRIANÇA: A PERCEPÇAO DE PROFESSORAS DA EDUCAÇÃO INFANTIL.

Author

ARRUDA, M. P., FEIJÓ DE ANDRADE, I. C., and MACHADO, S. S. B.

Abstract

This article derives from a dissertation that among other objectives aimed to know the perception of teachers on a historical period of transition between educational paradigms. qualitative research was carried out in a medium-sized municipality of RS; taking as a research tool oral history and content analysis for processing the data collected in the commitment statement of context with the full development of children. We understand, at the end of the study that the presence of the teachers inside the daycare strongly boosted the transition between care paradigm, a model built historically in Brazilian institutions and the overall development paradigm of children. The teachers felt protagonists of a time of change. In addition to caring, they realized that other dimensions emphasized the complexity of teaching practice in early childhood education as educate, play, interact and associate. [ABSTRACT FROM AUTHOR]

Published
2018
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9. Microperfusion studies of normal retinal vessels. D-glucose transport.

Author

Murta JN, Andrade IC, and Cunha-Vaz JG

Subjects
Animals, Biological Transport, Male, Rabbits, Capillary Permeability physiology, Glucose pharmacokinetics, Retinal Vessels physiology
Abstract

An experimental model was developed to study the permeability of individual retinal vessels in vitro using microperfusion techniques adapted from the kidney tubule studies. Inulin was used as the reference tracer and D-glucose as the test tracer. We found a concentration dependent flux of D-glucose from lumen to bath that increased as D-glucose concentrations in the lumen rose. The flattening of the hyperbolic curve at the higher D-glucose concentrations in the lumen appears consistent with the Michaelis-Menten equation (Km = 6 x 10(-3) M).

Published
1990

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