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Effect of tensile strain/well-width combination on the measured gain-radiative current characteristics of 635 nm laser diodes

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4 Author(s)
Lewis, G.M. ; Department of Physics and Astronomy, Cardiff University, Cardiff, CF24 3YB United Kingdom ; Smowton, P.M. ; Blood, P. ; Chow, W.W.

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Polarization sensitive measurements, in real units, of gain and spontaneous emission of GaInP lasers with three strain and well-width combinations allow us to isolate the intrinsic effects of strain when the well width is also adjusted to maintain a fixed output wavelength. Varying tensile strain and well width, for 635 nm operation, have no effect on transverse magnetic polarized recombination at fixed gain, which is consistent with a constant effective mass in the uppermost valence band, but the total transparency current decreases from 116 to 83 A cm-2 due to increasing separation of light and heavy hole bands. © 2003 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:82 ,  Issue: 10 )