Orthorhombic YAlO₃ – a novel many‐phonon SRS‐active crystal

Abstract

In single crystals of orthorhombic YAlO3, widely known as a host‐matrix for Ln3+‐lasant ions, many‐phonon stimulated Raman scattering interactions as well as different manifestations of cascaded and cross‐cascaded nonlinear χ(3)↔χ(3) processes are initiated by picosecond laser pulses. The scientific and applicative potential of YAlO3 crystals is considerably expanded by the demonstration of its SRS properties. In particular, the studies revealed the manifestation of eight χ(3)‐active vibrational modes. The corresponding Stokes and anti‐Stokes lines have been assigned and the steady‐state Raman gain coefficients related to the strongest phonon mode have been estimated. In addition, a short review presents the stimulated emission channels of its Ln3+‐ions together with some χ(3)‐nonlinear laser properties of crystals belonging to the binary Y2O3‐Al2O3 system.

Dielectric absorption behavior of YAlO3at terahertz frequencies

“…It is known that orthorhombic perovskite YAlO 3 (YAP) has many applications as a thermally stable inorganic crystal. For example, it can be used as a laser [4][5][6][7][8] and a scintillator, [9][10][11] since it emits luminescence when ions of rare-earth metals such as Nd 3+ and Yb 3+ are doped. In addition, Nd:YAP is expected as a candidate for a compact and powerful laser in a THz frequency range.…”

Fresnoite Ba2TiSi2O8: A novel stimulated Raman scattering active crystal

“…6) Recently, more scientists have begun to pay more attention to the search for new SRS-active crystals. [7][8][9][10] After the first discovery of Fresnoite Ba 2 TiSi 2 O 8 (BTS) crystals in Sanbornite-bearing metamorphic rocks in California, 11) many technologically important functional properties of Ba 2 TiSi 2 O 8 crystals, such as nonlinear optical, electrooptical, elasto-optical, photoconductive, piezoelectric, surface acoustic wave, and UV luminescence properties with long decay times, have been studied. [11][12][13][14][15][16][17][18][19][20] Besides the comprehensive exploration and investigation of new properties of Ba 2 TiSi 2 O 8 crystals, it is extremely important to search for new SRS-active crystals, and this is the starting point of the research reported here.…”