of the PL spectra of the emitted radiation along (011) and : of the analyzer. Solid dots are of the interface chemical bonds, we have performed the pumping of the polarization. It is found that the degree of of pumping power in the range of 45 m W to

doi:10.1201/9781482269109-71

Chapter

of the PL spectra of the emitted radiation along (011) and

ABSTRACT

The PC spectra for the incident radiation at different polarization angles are shown in Fig.3. We can also see that the PC spectra display a strong polarization dependence. Since the energy that corresponds to the spatially indirect transition in the GaAsSb/GaAs multiple quantum wells is about 1 eV, we therefore choose the photoresponse signal at around 1 eV to analyze the polarization behavior. Using the same definition of the polarization degrees defined for the PL spectra, we obtain that the value of P can also be as high as 40%. In addition, we can see that the polarization dependence of the PC spectra covers a wide range of wavelengths as shown in Fig.3. Figure 4. shows the polarization dependence of the PC response at around 1 eV. The data can also be described by the cos28 rule. The maximum and minimum signal correspond to the polarization along (011) and (o T 1), respectively, which is similar to the behavior of the PL spectra. It indicates that the anisotropic PC response arises from