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Il Tempo della Scienza

Seminari tecnici 2017

Sala Conferenze (Edificio M)
Strada delle Cacce 91, Torino

Data Relatore Titolo
27 febbraio
ore 16:30
Matteo Galli
Università di Pavia, Dipartimento di Fisica
Photonics and Nanostructures Group

Enhancing the optical functionalities of silicon with photonic nanostructures

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Silicon has long been established as the material of choice for the microelectronics industry. This is not yet true in photonics, where the limited degrees of freedom in material design combined with the indirect bandgap are a major constraint. Recent developments, especially those enabled by nanoscale engineering of the photonic properties, are starting to change the picture, opening up new possibilities for the realization of Si-based photonic nanostructures with advanced optical functionalities. In this talk we will give an overview of the ongoing research in this active area. We will focus on resonant silicon nanostructures, in which the electromagnetic field may be confined to extremely small spatial regions, thus obtaining a dramatic improvement of both linear and nonlinear optical properties.

10 febbraio
ore 10:30
Marco Barbieri
Università degli Studi Roma Tre

Of fringes and fridges

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Information processing and thermodynamics share common methods and concepts, notably the one of entropy, and Landauer's principle has established how deep profound their link is. In this talk, we will discuss some experiments on which we seek to apply this philosophy to quantum photonic, by interpreting some quantum information tasks - entanglement detection, state discrimination, weak measurements - under the lens of thermodynamics.

26 gennaio
ore 14:30
Ed. 7
Gian Michele Ratto
Istituto di Nanoscienze del CNR e Scuola Normale Superiore di Pisa

A window with a view: two photon microscopy and the secret life of the brain

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Two photon microscopy has emerged as a powerful tool to image form and function in the brain in vivo: neurons and glia can be visualised by means of an ever expanding range of fluorescent probes and a wide variety of information can be collected in the intact brain. For example, transgenic mice expressing the Green Fluorescent Protein in selected neuronal population can be used to image the morphological development of neurons. Functional studies relies on genetically encoded or synthetic dyes to visualize cellular and network function with sub cellular resolution. At this time, two photon imaging is the only available tool that allows to peer into neuronal function in the intact brain at the cell population level. Indeed, intravital imaging has provided novel insights on brain structure and function with unprecedented temporal and spatial resolution. The availability of genetic and pharmacological models of brain pathologies, allow to investigate function and form in the normal and diseased cortex.

In this talk I will give an overview of what we can see in the brain when we put together two photon imaging with novel genetic sensor to image different aspects of brain cells.

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