T. Aizawa et al., POLARIZATION-INDEPENDENT REFRACTIVE-INDEX CHANGE IN INGAAS INGAASP TENSILE STRAINED QUANTUM-WELL/, Electronics Letters, 29(1), 1993, pp. 21-22
The polarisation independent refractive index change in the tensile st
rained InGaAs/InGaAsP quantum well (QW) structure has been measured ov
er the whole spectral range, i,e. near and below the bandgap energy. B
y inducing a 0.3% tensile strain in the InGaAs QW, the spectral profil
es for the TE and TM modes are brought closer to each other, with the
same refractive index change occurring at around 1.565 mum.