Abstract
The molecular beam epitaxial growth and characteristics of 1.45μm metamorphic InAs quantum dot tunnel injection lasers on GaAs have been studied. Under optimized growth conditions, the quantum dots exhibit photoluminescence linewidths ∼30meV and high intensity at room temperature. The lasers are characterized by ultralow threshold current (63A∕cm2), large frequency response (f−3dB=8GHz), and near-zero α parameter and chirp.
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