Second Harmonic Generation in Selenium-Metal Structures

Journal of Non-Crystalline Solids 2009
Vjačeslavs Gerbreders, Ēriks Sledevskis, Vadims Kolbjonoks, Jānis Teteris, Arnis Gulbis

Results of second harmonic (SH) generation in amorphous and crystalline selenium films and selenium-metal (Ga, Zn, In, Sb, Bi) sandwich structures induced by titan-sapphire femtosecond laser (wavelength λ – 690–1040 nm) are presented. It is found that the highest intensity of SH is provided by fundamental wave at wavelength 1000 nm and it reaches maximum in approximately 100 s. The intensity of transmitted SH depends on film thickness while that of reflected does not. The highest SH intensities in selenium-metal structures are provided by Se–Ga and Se–Zn films. A possible mechanism for central symmetry breaking in amorphous films also is proposed.

Keywords
non-linear optics, photoinduced effects
DOI
10.1016/j.jnoncrysol.2009.04.059

Gerbreders, V., Sledevskis, Ē., Kolbjonoks, V., Teteris, J., Gulbis, A. Second Harmonic Generation in Selenium-Metal Structures. Journal of Non-Crystalline Solids, 2009, Vol.355, iss.37-42, pp.1959-1961. ISSN 0022-3093. Available from: doi:10.1016/j.jnoncrysol.2009.04.059

Publication language
English (en)