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Light and matter on critical timescales studied by nonlinear terahertz spectros...

Light and matter on critical timescales studied by nonlinear terahertz spectroscopy In this project we will experimentally study the behaviour of light and matter on the timescales, at which their fundamental properties are being formed. We define such critical timescales as: For light - the timescale of a single... ver más

28/02/2017

MPG

100K€

Presupuesto del proyecto: 100K€

Líder del proyecto

MAXPLANCKGESELLSCHAFT ZUR FORDERUNG DER WISSE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2017-02-28 No tenemos la información de la convocatoria

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1 Participantes

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0.00€ | Lider

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Líder del proyecto

MAXPLANCKGESELLSCHAFT ZUR FORDERUNG DER WISSE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 100K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto In this project we will experimentally study the behaviour of light and matter on the timescales, at which their fundamental properties are being formed. We define such critical timescales as: For light - the timescale of a single optical cycle. This naturally requires the sub-cycle time resolution in the experiments. For matter – the time during which the quantum-mechanical dimensionality (e.g. 0D or 3D) in the material can be established or significantly modified. We want to find out how fast do some of the fundamental physical phenomena occur, and what exactly governs these critical timescales. Presently there is no concrete answer to this how fast? question regarding establishment of many physical properties. Many phenomena are simply referred to as instantaneous, i.e. occurring on zero timescale, which is a euphemism for we don’t know how fast they are. Using nonlinear ultrafast terahertz (THz) spectroscopy as an experimental method, and semiconductors as a material system, in this project we will investigate the following problems: 1) Development of optical supercontinuum from a single cycle of light in a nonlinear medium. We aim to directly observe the synthesis of new frequencies in the optical signal. 2) How fast can one modulate a simple quantum-mechanical system by an external field? How fast is Stark effect, and what constitutes the maximum electro-absorption modulation speed limit? 3) How fast is the creation of quantum-mechanical dimensionality in a crystal? How fast the energy band in a crystal, a result of interference of the wavefunctions of individual atomic potentials, is formed? What governs this time scale? Is it the reciprocal of energy width of the band?

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