Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties
Authorized Users Only
2016
Authors
Kovacević, AleksanderRistic-Djurović, Jasna L.
Lekić, Marina
Hadžić, Branka
Abudagel, Giuma Saleh Isa
Petričević, Slobodan
Mihailović, Pedja
Matović, Branko
Dramlić, Dragan
Brajović, Ljiljana
Romčević, Nebojsa
Article (Published version)
Metadata
Show full item recordAbstract
High quality bismuth germanium oxide single crystals were irradiated by a femtosecond pulsed laser beam of increasing power. Analyses performed on irradiated and unirradiated samples showed significant changes in transmittance, transmission spectra, sample color, Raman spectra, X-ray diffraction (XRD) pattern, Verdet constant, magneto-optical property, and absorption coefficient. After irradiation, the transmission spectra values increased whereas anisotropy detected in the transmission spectra of unirradiated samples disappeared. The change of color caused by irradiation was noticeable to the naked eye. The XRD measurements confirmed structural changes induced by laser irradiation, i.e., the laser-beam-incident side of the sample became almost amorphous, whereas the side opposite to the incident can be indexed to the Bi12GeO20 compound. Irradiation caused increase of Raman spectra peaks with the exception of crystal peaks of type E, which disappeared. The femtosecond pulsed laser irra...diation can be used to improve bismuth germanium oxide single crystal optical properties.
Keywords:
Optical materials / Laser annealing / Raman spectroscopy / Optical properties / Color centersSource:
Materials Research Bulletin, 2016, 83, 284-289Publisher:
- Elsevier Ltd
Funding / projects:
- Optoelectronics nanodimension systems - the rout towards applications (RS-45003)
- Fabrication and characterization of nano-photonic functional structrues in biomedicine and informatics (RS-45016)
DOI: 10.1016/j.materresbull.2016.06.023
ISSN: 0025-5408