Abstract
We demonstrate a 1.55 μm GaAsGaNAsSbGaAs optical waveguide grown by molecular beam epitaxy as an alternative to the AlGaAsGaAs system. The 0.4-μm -thick GaNAsSb guiding layer contains ∼3.5% of N and 9% of Sb, resulting in optical band gap of 0.88 eV. The refractive index of the GaNAsSb layer was measured from 800 to 1700 nm. The GaNAsSb layer has a refractive index value of 3.42 at 1.55 μm wavelength. The propagation loss measured using the Fabry-Ṕrot resonance method was found to be affected by nitrogen-related defect absorption.
Original language | English (US) |
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Article number | 113513 |
Journal | Applied Physics Letters |
Volume | 92 |
Issue number | 11 |
DOIs | |
State | Published - 2008 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)