Tesi etd-08302013-180810 |
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Tipo di tesi
Tesi di laurea magistrale
Autore
BONITO, VALENTINA
URN
etd-08302013-180810
Titolo
Effects of polarization, plasma and thermal initiation pathway on irradiance threshold of laser induced optical breakdown
Dipartimento
INGEGNERIA DELL'INFORMAZIONE
Corso di studi
INGEGNERIA BIOMEDICA
Relatori
relatore VARGHESE, BABU
relatore Prof. Landini, Luigi
relatore Prof. Landini, Luigi
Parole chiave
- irradiance
- optical breakdown
- plasma
- radial polarization
- thermal breakdown
Data inizio appello
24/09/2013
Consultabilità
Completa
Riassunto
The aim of this work of thesis is to find an effective method to lower the irradiance threshold for laser induced optical breakdown. Here we investigated three potential solutions: (i) use of radially polarized light and influence of size of focal spot, (ii) thermionic emission of seed electrons (thermal initiation pathway) for creating optical breakdown (iii) presence of free electrons (ionization by an external plasma source).
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