Papatryfonos, K;
Angelova, T;
Brimont, A;
Reid, B;
Guldin, S;
Smith, PR;
Tang, M;
... Selviah, D; + view all
(2021)
Refractive indices of MBE-grown AlxGa(1−x)As ternary alloys in the transparent wavelength region.
AIP Advances
, 11
, Article 025327. 10.1063/5.0039631.
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Abstract
A series of AlxGa(1−x)As ternary alloys were grown by molecular beam epitaxy (MBE) at the technologically relevant composition range, x < 0.45, and characterized using spectroscopic ellipsometry to provide accurate refractive index values in the wavelength region below the bandgap. Particular attention is given to O-band and C-band telecommunication wavelengths around 1.3 µm and 1.55 µm, as well as at 825 nm. MBE gave a very high accuracy for grown layer thicknesses, and the alloys’ precise compositions and bandgap values were confirmed using high-resolution x-ray diffraction and photoluminescence, to improve the refractive index model fitting accuracy. This work is the first systematic study for MBE-grown AlxGa(1−x)As across a wide spectral range. In addition, we employed a very rigorous measurement-fitting procedure, which we present in detail.
| Type: | Article |
|---|---|
| Title: | Refractive indices of MBE-grown AlxGa(1−x)As ternary alloys in the transparent wavelength region |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/5.0039631 |
| Publisher version: | https://doi.org/10.1063/5.0039631 |
| Language: | English |
| Additional information: | © 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/5.0039631., |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10120401 |
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