AlGaN-Based Bragg Reflectors
- 1 January 1997
- journal article
- Published by Springer Nature in MRS Internet Journal of Nitride Semiconductor Research
Abstract
We have studied the dependence of the absorption edge and the refractive index of wurtzite AlxGa1−xN films on composition using transmission, ellipsometry and photothermal deflection spectroscopy. The Al molar fraction of the AlxGa1−xN films grown by plasma-induced molecular beam epitaxy was varied through the entire range of composition (0 ≤ x ≤ 1). We determined the absorption edges of AlxGa1−xN films and a bowing parameter of 1.3 ± 0.2 eV. The refractive index below the bandgap was deduced from the interference fringes, the dielectric function between 2.5 and 25 eV from ellipsometry measurements. The measured absorption coefficients and refractive indices were used to calculate the design and reflectivity of AlGaN-based Bragg reflectors working in the blue and near-ultraviolet spectral region.Keywords
This publication has 20 references indexed in Scilit:
- Ridge-geometry InGaN multi-quantum-well-structure laser diodesApplied Physics Letters, 1996
- An optically pumped GaN–AlGaN vertical cavity surface emitting laserApplied Physics Letters, 1996
- Refractive indices of zincblende structure β-GaN(001) in the subband-gap region (0.7–3.3 eV)Applied Physics Letters, 1996
- PEMBE-Growth of Gallium Nitride on (0001) Sapphire: A comparison to MOCVD grown GaNMRS Internet Journal of Nitride Semiconductor Research, 1996
- Threshold Estimation of GaN-Based Surface Emitting Lasers Operating in Ultraviolet Spectral RegionJapanese Journal of Applied Physics, 1995
- Optical properties and temperature dependence of the interband transitions of cubic and hexagonal GaNPhysical Review B, 1994
- Movpe Growth of High Quality AlxGa1−xN/GayIn1-yN (x>0, y<1) Heterostructures for Short Wavelength Light EmitterMRS Proceedings, 1994
- Properties of AlxGa1−xN films prepared by reactive molecular beam epitaxyJournal of Applied Physics, 1982
- 10-30-eV optical properties of GaNPhysical Review B, 1981
- Die Konstitution der Mischkristalle und die Raumf llung der AtomeThe European Physical Journal A, 1921