Terahertz response of gadolinium gallium garnet (GGG) and gadolinium scandium gallium garnet (SGGG)

Abstract

We report the magneto-optical response of Gadolinium Gallium Garnet (GGG) and Gadolinium Scandium Gallium Garnet (SGGG) at frequencies ranging from 300 GHz to 1 THz, and determine the material response tensor. Within this frequency window, the materials exhibit nondispersive and low-loss optical responses. At low temperatures, significant THz Faraday rotations are found in the (S)GGG samples. Such strong gyroelectric response is likely associated with the high-spin paramagnetic state of the Gd 3+ ions. A model of the material response tensor is determined, together with the Verdet and magneto-optic constants.

Optical and magneto‐optical properties of pulsed laser‐deposited thulium iron garnet thin films

“…The substrate material employed here is partly substituted by Ca, Mg and Zr; thus, it exhibits a stoichiometry Gd 3 − x Ca x Ga 5 − x − 2 y Mg y Zr x + y O 12 (x = 0.4 and y = 0.25) and an expanded lattice constant of 12.50 Å. The ordered parent compounds are the triclinic (P-1), ferromagnetic insulator CaCd 2 ZrGa 4 O 12 [30] and the cubic garnet The terahertz determination of the response functions of pristine and Sc-doped GGG [33] indicates that at least Sc substitution does not significantly change the low-temperature THz Faraday rotation, low-loss and nondispersive optical response properties of the pristine material.…”

“…The terahertz determination of the response functions of pristine and Sc‐doped GGG [33] indicates that at least Sc substitution does not significantly change the low‐temperature THz Faraday rotation, low‐loss and nondispersive optical response properties of the pristine material.…”

Optical, Structural, and Mechanical Properties of Gd3Ga5O12 Single Crystals Irradiated with 84Kr+ Ions

“…Their various properties have been studied and analyzed in detail using many different methods, including photoluminescence, optical absorption and transmission, infrared and Raman spectra, neutron diffraction, and so on. [2,[12][13][14][15][16][17] In particular, it was reported from spectroscopic ellipsometry and transmission measurements that at room temperature, Gd 3 Ga 5 O 12 has a direct bandgap at 5.66 AE 0.01 eV. [17] Gd 3 Ga 5 O 12 belongs to the garnet crystal structure family with a cubic unit cell and space group Ia3d.…”