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Polarization control of vertical-cavity surface-emitting lasers through use of an anisotropic gain distribution in [110]-oriented strained quantum-well structures

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5 Author(s)
Sun, Decai ; Lab. for Optics & Quantum Electrons., Virginia Univ., Charlottesville, VA, USA ; Towe, Elias ; Ostdiek, P.H. ; Grantham, J.W.
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An analysis of the in-plane optical matrix elements connected with the gain distribution of (In,Ga)As-GaAs quantum-well structures on (110) GaAs substrates is presented. The in-plane gain distribution is found to be anisotropic-with a maximum directed along the [1¯10]-[11¯0] crystallographic axis. Optically-pumped vertical-cavity surface-emitting lasers on the (110) surface with these quantum wells in the cavity exhibit stable, well-defined polarization states; this stability is believed to be a consequence of the predicted anisotropic gain distribution on the (110) surface. Of the two orthogonal eigen polarizations observed, the one with the higher optical intensity, for a given pump power, was found to be stabilized along the [1¯10] crystallographic axis; this is in agreement with the analysis

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:1 ,  Issue: 2 )