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Published online by Cambridge University Press: 21 February 2011
We report the realization of high quality strained InGaAs/GaAs multiplequantum wells (MQW) grown on planar GaAs (100) substrates throughoptimization of molecular beam epitaxical (MBE) growth conditions andstructure. Such MQWs containing ∼ 11% In have lead to the realization of anasymmetric Fabry-Perot (ASFP) reflection modulator with a room temperaturecontrast ratio of 66:1 and an on-state reflectivity of 30%. For Incomposition ≥ 0.2, the improved optical quality for very thick (gt;2μm)InGaAs/GaAs MQWs grown on pre-patterned substrates is demonstrated viatransmission electron microscopy (TEM) and micro-absorptionmeasurements.