2 May 2014 Multipolar second-harmonic generation from films of chalcogenide glasses
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Abstract
Chalcogenide glasses are amorphous semiconductors with a number of interesting properties required for photonic devices. Particularly, their optical properties can be tuned through the change of the glass composition. We investigate second-order nonlinear optical properties of chalcogenide glass (Ge27Se64Sb9) thin films fabricated by thermal evaporation. The strong second-harmonic generation observed for the samples investigated is analyzed as a function of incident polarization. Furthermore, the role of multipole effects in second-harmonic generation is also studied by using two beams at the fundamental frequency. Our results suggest that the higher-multipole effects are present and contribute significantly to the second-harmonic response of chalcogenide the samples.
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A. Slablab, K. Koskinen, R. Czaplicki, N. Thachan Karunakaran, I. Sebastian, C. Pradeep Chandran, M. Kailasnath, P. Radhakrishnan, M. Kauranen, "Multipolar second-harmonic generation from films of chalcogenide glasses", Proc. SPIE 9126, Nanophotonics V, 912621 (2 May 2014); doi: 10.1117/12.2051477; https://doi.org/10.1117/12.2051477
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