Controlling polarization of quantum-dot surface-emitting lasers by using structurally anisotropic self-assembled quantum dots

摘要

Polarization control is achieved in vertical-cavity surface-emitting lasers (VCSELs) by using structurally anisotropic self-assembled quantum dots (QDs) as active layers. The dot shape is long in the 0T1 direction on the (100) surface. The photoluminescence from the dots has a polarization dependence whose intensity along the 0T1 direction is 1.37 times stronger than that along the orthogonal 011 direction. The QD VCSEL operates at the wavelength of the QD ground state transition. Lasing emission shows polarization along the 0 1 direction and an orthogonal polarization suppression ratio of 18 dB. # 1997 American Institute of Physics.S0003-6951(97)0253 l-X