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Possible Materials for Second Harmonic Generation and for Laser Action
Author(s) -
van Den Berg C. B.
Publication year - 1965
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.19650110213
Subject(s) - perpendicular , piezoelectricity , laser , crystal (programming language) , second harmonic generation , optics , group (periodic table) , harmonic , crystallography , coherence (philosophical gambling strategy) , ion , physics , materials science , chemistry , geometry , mathematics , quantum mechanics , computer science , programming language , acoustics
The possibility is discussed of obtaining laseraction in the group of crystals of composition [Me(III)en 3 ] X 3 with some Me(III) = Rh and/or Ir replaced by Cr(III); en = 1,2 diaminoethane. The optical properties are nearly independent of the nature of X. Large crystals of fine optical quality can be grown and the group contains centro‐symmetric as well as piezoelectric crystals. Apart from the above possibility a second harmonic generating device is proposed consisting of a single‐crystal plate comprising alternate layers of non‐centro‐symmetric [Rh 1− x Ir x en 3 ]X 3 and [Rh 1− x ‐α Ir x Co α en 3 ]X 3 . The Co(III)‐ions act as SHG‐active centers and the periodic array maintains coherence between the 2 ω‐waves. The device is not limited to a specific crystallographic direction. There is no restriction by the aperture effect for the case in which the fundamental frequency enters the device perpendicular and along a principal axis. Construction of this periodic array appears to be possible.