ANISOTROPIC INTERFACIAL STRAIN IN INP INGAAS/INP QUANTUM-WELLS STUDIED USING DEGREE OF POLARIZATION OF PHOTOLUMINESCENCE/

Room-temperature, polarization-resolved photoluminescence from a (001) surface has been used to investigate InP/mGaAs/InP quantum wells grow n by gas source molecular beam epitaxy. The degree of polarization of photoluminescence from a (001) surface, DOP001, is a direct measure of the anisotropy of polarization of luminescence between [110] and [1(1 ) over bar0$] directions, DOP001 is observed to be strongly dependent on the quantum well thickness, composition (strain), and the gas switc hing time at the growth-interrupted interface. Results show that the a nisotropy of polarization may be due to an effect of an anisotropic st rain field that is associated with strained bonds at the interfaces of the quantum well. (C) 1997 American Institute of Physics.