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Optical second‐harmonic generation in SbSI
Author(s) -
Häfele H. G.,
Wachernig H.,
Irslinger C.,
Grisar R.,
Nitsche R.
Publication year - 1970
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19700420207
Subject(s) - ferroelectricity , second harmonic generation , modulation (music) , chemistry , harmonic , condensed matter physics , phase transition , coherence (philosophical gambling strategy) , optics , surface second harmonic generation , signal (programming language) , interference (communication) , laser , materials science , optoelectronics , physics , dielectric , channel (broadcasting) , electrical engineering , engineering , quantum mechanics , computer science , acoustics , programming language
The optical second‐harmonic generation in antimonysulfoiodide (SbSI) was studied with a Q‐switched CO 2 ‐laser. The temperature dependence for various crystals was observed in the range −140 to +40 °C which includes the ferroelectric phase transition at about 20 °C. The nonlinear susceptibility χ 33 is about one order of magnitude smaller than χ 11 in tellurium. The coherence length l c is estimated to be 165 μm. The SH signal in plane‐parallel samples shows strong temperature dependent modulation produced by interference of fundamental waves. Two further modulations with smaller periods are observed but not explained. Applied electric fields influence the SH power by the electro‐optic effect and by an unidentified mechanism, which causes striking enhancement.