Multipolar second-harmonic generation from films of chalcogenide glasses

被引：1
|
作者：
Slablab, A. [1 ]
Koskinen, K. [1 ]
Czaplicki, R. [1 ]
Karunakaran, N. Thachan [2 ]
Sebastian, I. [2 ]
Chandran, C. Pradeep [2 ]
Kailasnath, M. [2 ]
Radhakrishnan, P. [2 ]
Kauranen, M. [1 ]
机构：
[1] Tampere Univ Technol, Dept Phys, POB 692, FIN-33101 Tampere, Finland
[2] Cochin Univ Sci & Technol, Int Sch Photon, Kochi 682022, Kerala, India
来源：
NANOPHOTONICS V | 2014年 / 9126卷
基金：
芬兰科学院;
关键词：
Second-harmonic generation; tensor components; chalcogenide glasses; thin film; OPTICAL-PROPERTIES; SURFACE; BULK;
D O I：
10.1117/12.2051477
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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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页数：7
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