An alternative differential method of femtosecond pump-probe examination of materials

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Título :	An alternative differential method of femtosecond pump-probe examination of materials
Palabras clave :	FENTOSECONDS LASER
Fecha de publicación :	16-ene-2013
Editorial :	OPTICS EXPRESS
Descripción :	We describe an alternative method for femtosecond pumpprobe beam examination of energy transport properties of materials. All already reported techniques have several drawbacks which limit precise measurements of reflection coefficient as function of time. A typical problem is present when rough samples are being studied. In this case the pump-beam polarization changes randomly which may produce a spurious signal, drastically reducing the signal to noise ratio. Some proposals to alleviate such problem have been reported, however, they have not been totally satisfactory. The method presented here consists on measuring the difference between the two delays’ signals of the probe-beam. As will be explained, our proposal is free of typical drawbacks. We also propose a numerical method to recover the DR(t)/R curve from the measured data. Numerical simulations show that our proposal is a viable alternative. INSTITUTO POLITECNICO NACIONAL, CONACYT
URI :	http://www.repositoriodigital.ipn.mx/handle/123456789/11583
Otros identificadores :	http://hdl.handle.net/123456789/1120
Aparece en las colecciones:	Doctorado

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