Časově rozlišená laserová spektroskopie nanomateriálů
Time-resolved laser spectroscopy of nanomaterials
diplomová práce (OBHÁJENO)
Zobrazit/ otevřít
Trvalý odkaz
http://hdl.handle.net/20.500.11956/20977Identifikátory
SIS: 47658
Kolekce
- Kvalifikační práce [10926]
Autor
Vedoucí práce
Konzultant práce
Malý, Petr
Oponent práce
Šimurda, Miroslav
Fakulta / součást
Matematicko-fyzikální fakulta
Obor
Optika a optoelektronika
Katedra / ústav / klinika
Katedra chemické fyziky a optiky
Datum obhajoby
12. 5. 2009
Nakladatel
Univerzita Karlova, Matematicko-fyzikální fakultaJazyk
Čeština
Známka
Výborně
This diploma thesis is oriented to study of nonlinear properties of semiconductor nanocrystals using ultrashort femtosecond pulses. There is a detailed description of theory and experimental setup of the z-scan method, which can be used to measure the nonlinear refractive index and the two-photon absorption coefficient. In theoretical part we describe the influence the quality of laser beam, quality and thickness of the sample on measurements. There are numerical simulations of the measurements influenced by these parameters. This theory is used for processing of the measured dates by a program, which is attached to this thesis on CD. In experimental part we measured nonlinear refractive indeces of diamond nanocrystals fabricated by the PECVD method, silicon and CdS nanocrystals in glass matrices. One part of this thesis deals with the preparation and optimalization of the experimental setup and increasing the signal/noise ratio.