HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

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

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.
Document type :
Journal articles
Complete list of metadata

Cited literature [17 references]  Display  Hide  Download

https://hal-cnrs.archives-ouvertes.fr/hal-02562585
Contributor : Pascale Armand Connect in order to contact the contributor
Submitted on : Monday, November 9, 2020 - 10:13:18 AM
Last modification on : Friday, April 1, 2022 - 9:37:49 AM
Long-term archiving on: : Wednesday, February 10, 2021 - 6:04:34 PM

Files

IR-reflectivity-GeO2.MRB.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

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, Elsevier, 2020, 129, pp.110881. ⟨10.1016/j.materresbull.2020.110881⟩. ⟨hal-02562585⟩

Share

Metrics

Record views

57

Files downloads

200