Near infrared to ultraviolet anisotropic optical properties of single crystal SrLaAlO4 from spectroscopic ellipsometry. Issue 10 (17th August 2016)

• Record Type: Journal Article
• Authors: Adhikari, Dipendra; Junda, Maxwell M.; Uprety, Prakash; Ghimire, Kiran; Subedi, Indra; Podraza, Nikolas J.
• Is Part Of: Physica status solidi. Volume 253:Issue 10(2016)
• Page Start: 2066
• Page End: 2072
• Publication Date: 2016-08-17
• Subjects: anisotropy -- birefringence -- ellipsometry -- Mueller matrix -- SrLaAlO4; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201600286
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : The anisotropic optical properties of single crystal SrLaAlO4 are investigated using spectroscopic ellipsometry over the range from 0.74 to 5.90 eV. Divided spectral range analysis of ellipsometric and Mueller matrix spectra are used to obtain the sample structural parameters (surface roughness thickness and void fraction). The ordinary and extra‐ordinary optical properties in the form of complex dielectric function, ϵ = ϵ 1 + i ϵ 2 (or complex index of refraction, N = n + i k ), spectra are extracted from the same analysis. The observed birefringence is ∼ 0.025 in the transparent range. An upper limit for the indirect gap at 3.01 ± 0.01 eV and a critical point at 5.54 ± 0.01 eV are identified within the measured spectral range.