Łukasz Chrobak

Design and optimisation of the photoacoustic cell for nondestructive photoacoustic spectroscopy

This paper describes the design and optimisation of the photoacoustic (PA) cell for nondestructive PA spectroscopy. The results of numerical calculations of the acoustic properties of the PA cell are compared with experimental measurements with respect to the frequency response and the quality factor of the cell. The method of designing and optimising of the PA cell is presented. Advantages and disadvantages of this study are discussed.

Badania wybranych materiałów optoelektronicznych z wykorzystaniem fototermicznej radiometrii w podczerwieni

In this paper the experimental results of the photothermal radiometry (PTR) investigations of the optoelectronic materials have been presented. The details concerning the used technique have been described. Investigations have been performed on the silicon and silicongermanium samples. Details of the experimental set-up have been discussed. In this work the interpretation abilities connected with the usage of the described experimental method and the described PTR signal mathematical models have been discussed. (Investigations of chosen optoelectronic materials with the photothermal infrared radiometry). Słowa kluczowe: badania nieniszczące, radiometria w podczerwieni, krzem, krzem-german, parametry rekombinacyjne, czas życia nośników.