Optical properties in the infrared range of the birefringent α-GeO2 single crystal - Archive ouverte HAL Access content directly
Journal Articles Materials Research Bulletin Year : 2020

Optical properties in the infrared range of the birefringent α-GeO2 single crystal

(1) , (1) , (2) , (1) , (2) , (3) , (4) , (1)
1
2
3
4

Abstract

The components of the frequency-dependent complex refractive index were determined indirectly for the new non-centrosymmetric α-GeO2 crystal using polarized Fourier transform infrared reflectivity spectra measured in the far- and mid-infrared spectral region at room temperature. All the longitudinal- and transverse-optical infrared active modes with E and A2 symmetry, according to the D3 point group, were identified and localized within the 100-1000 cm-1 range in very good agreement with a previous first-principles based calculation. For the A2- and E-type modes, both the longitudinal- and transverse-optical splitting were detected. The refractive indices no ( E⊥c) and ne (E //c) in the infrared domain present considerably higher values than the ones observed in the visible light range, and the high birefringence would find application in many optical devices.
Fichier principal
Vignette du fichier
IR-reflectivity-GeO2.MRB.pdf (899.97 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02562585 , version 1 (09-11-2020)

Identifiers

Cite

Pascale Armand, Patrick Hermet, Jean-Louis Bantignies, Abel Haidoux, David Maurin, et al.. Optical properties in the infrared range of the birefringent α-GeO2 single crystal. Materials Research Bulletin, 2020, 129, pp.110881. ⟨10.1016/j.materresbull.2020.110881⟩. ⟨hal-02562585⟩
62 View
257 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More