Naslov
Spectroscopy of GaAs laser produced plasma

Autori
Bišćan, Marijan ; Kregar, Zlatko ; Krstulović, Nikša ; Milošević, Slobodan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
14th Joint Vacuum Conference - 12th European Vacuum Conference - 11th Annual Meeting of the German Vacuum Society - 19th Croatian - Slovenian Vacuum Meeting, Book of abstracts / Radić, Nikola ; Milošević, Slobodan - Zagreb : Hrvatsko Vakuumsko Društvo (HVD), 2012, 153-153

ISBN
978-953-98154-1-5

Skup
14th Joint Vacuum Conference - 12th European Vacuum Conference - 11th Annual Meeting of the German Vacuum Society - 19th Croatian - Slovenian Vacuum Meeting

Mjesto i datum
Dubrovnik, Hrvatska, 04.06.2012. - 08.06.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Pulsed laser deposition; GaAs

Sažetak
We have studied the emission from laser produced plasma of GaAs depending on helium and argon background pressure. We used nanosecond Nd:YAG pulsed laser at 1064 nm to ablate GaAs (100) rotated target. The laser fluence was 28 J/cm2. The gas pressure was changed in the range from 5∙10-3 to 150 mbar. Characteristic spectral lines of As I, II, III and Ga I, II were chosen to monitor time evolution of the plasma plume content. Spectral selection was achieved by means of 60 cm monochromator equipped with a photomultiplier. Spatial selection of the upper part of the plume was achieved by use of an optical imaging system that projects narrow part of the plume onto the entrance slit. A time resolved signals were recorded by means of a digital oscilloscope. These signals show different (de)excitation mechanisms for different atomic states. Simultaneously images of the plasma plume shape at given pressure were recorded by commercial CCD camera. We have found that ratios of neutrals and ions emission intensities depend on background gas pressure. Results for argon and helium are compared and discussed in terms of possible application to pulse laser deposition technique.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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