Ch. Lin et al., NORMALLY-ON GAAS ALAS MULTIPLE-WELL FABRY-PEROT REFLECTION MODULATORSFOR LARGE 2-DIMENSIONAL ARRAYS/, Applied physics letters, 65(10), 1994, pp. 1242-1244
We report normal-incident normally-on 90 angstrom GaAs/21 angstrom AlA
s multiple-quantum-well Fabry-Perot reflection modulators operating at
the same wavelength with the same reverse bias over much of a 2 in. w
afer. The fabricated modulators achieve ON/OFF reflectance changes lar
ger than 48% and ON/OFF contrast ratios larger than 14.7 over a diamet
er of 31 mm at the wavelength of 845 nm with a fixed bias of 7 V. Over
a diameter of 40 mm, these modulators achieve reflectance changes lar
ger than 43.2% and contrast ratios larger than 5.