Measurement of the refractive index of GaInAs/InP quantum wells by a grating coupling technique
- 4 December 1995
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 67 (23) , 3441-3443
- https://doi.org/10.1063/1.115273
Abstract
Effective indices of modes propagating in multiple GaInAs wells on InP barriers (MQW) waveguides are accurately measured in the 1.4–1.75 μm wavelength range using the grating coupling technique. Quantum size effects cause a selective polarization absorption and high birefringence, strongly depending on wavelength. The temperature dependence of refractive index and absorption originating from the temperature-dependent band gap is also observed. In the transparency region the refractive indices of GaInAs wells in InP barriers are deduced for two well widths using a multilayer slab waveguide model and an exciton model based on Lorentzian oscillator.Keywords
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