Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
70 (1997), S. 87-89
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The pure strain dependence of the chirp parameter (linewidth enhancement factor) of electroabsorption in the 1.55 μm window for strain ranging from compression to tension is studied theoretically in InGaAsP strained quantum well (QW) structures. The small-signal chirp parameter for TE polarization is evaluated from calculated electroabsorption (EA) spectra based on k⋅p theory and their Kramers–Krönig transformed refractive index changes. It is found that both compressive and tensile strain in the well layer reduce the chirp parameter. In a tensile-strained QW, almost continuously negative values irrespective of applied electric fields occur at an optimized amount of strain. The compressive-strained QW lowers the chirp parameter to nearly zero or negative values, the amount of the reduction being proportional to strain amount. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.119316
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