TITLE

Observation of large quadratic electro-optic effect in GaAs/AlGaAs multiple quantum wells

AUTHOR(S)
Wood, Thomas H.; Tkach, Robert W.; Chraplyvy, Andrew R.
PUB. DATE
March 1987
SOURCE
Applied Physics Letters;3/30/1987, Vol. 50 Issue 13, p798
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We simultaneously measure the intensity modulation level and the optical spectrum of the output of a multiple quantum well modulator, and use these data to deduce the electro-optic coefficients. The effect is quadratic, with a measured |s33|=4.6×10-13 cm2/V2 at a wavelength 12 meV below the band gap. This is approximately 800 times the coefficient measured further from the band gap. We are able to achieve a fractional change in the refractive index of 3.7%. Despite the size of this effect, when we operate the device as an intensity modulator, we observe a linewidth enhancement factor of α=1.0, which means the chirp induced in the device’s output will be small.
ACCESSION #
9822528

 

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