Spodumene, α-LiAlSi₂O₆ - A new natural SRS-active crystal with three <i>x</i>⁽³⁾-promoting vibrational modes

Author(s)

Alexander A. Kaminskii, Ladislav Bohaty, Eugen Libowitzky, Hanjo Rhee, Oliver Lux, Hans-Joachim Eichler, Reiner Kleinschrodt, Hitoki Yoneda, Akira Shirakawa, Petra Becker

Abstract

α-LiAlSi

₂O

₆, known as mineral spodumene, is introduced as a novel SRS-active crystal with monoclinic symmetry C2/c. Under picosecond laser excitation Raman-induced steady-state χ

⁽³⁾-nonlinear generation in the visible and near-IR is observed in the crystals. All recorded Stokes and anti-Stokes high-order lasing components are identified and correspond to three SRS-promoting phonon modes with ω

_SRS1 ≈ 709 cm

⁻¹, ω

_SRS2 ≈ 357 cm

⁻¹ and ω

_SRS3 ≈ 1074 cm

⁻¹. On the basis of the results of a spontaneous Raman scattering study they were assigned to vibrations of the tetrahedral [SiO

₄] groups of the silicate chains and lattice modes of Li-O or Al-O of the crystal structure. A brief review in tabular form of so far known SRS-active natural crystals (minerals) is given as well.

Organisation(s)

Department of Mineralogy and Crystallography

External organisation(s)

Russian Academy of Sciences, Universität zu Köln, Technische Universität Berlin, The University of Electro-Communications

Journal

Optical Materials

Volume

78

Pages

235-246

No. of pages

12

ISSN

0925-3467

DOI

https://doi.org/10.1016/j.optmat.2018.02.022

Publication date

04-2018

Peer reviewed

Yes

Austrian Fields of Science 2012

104026 Spectroscopy, 105116 Mineralogy

Keywords

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Spectroscopy, General Computer Science, Inorganic Chemistry, Physical and Theoretical Chemistry, Organic Chemistry

Portal url

https://ucrisportal.univie.ac.at/en/publications/5b2a9522-3e50-4864-9ec1-5d507a186466