Abstract
A violet–green integrated laser converter with a quantum efficiency of ∼1% at a wavelength of 515 nm has been fabricated on the basis of a CdSe/ZnSSe/ZnMgSSe quantum dot (QD) laser heterostructure. The structure is optically pumped by a 416 nm emission of a commercial InGaN/GaN-pulsed laser diode via a microlens system. Different designs of the CdSe QD laser structures grown by molecular beam epitaxy have been employed, with the maximum efficiency being achieved in the structure comprising five electronically coupled CdSe QD active layers embedded in a ZnSSe/ZnSe superlattice waveguide.
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