Yoshito Akashi

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Electron non-radiative recombination process of photoexcited carriers in as-grown and annealed n-A10. 2Gao.sAs/GaAs hetero-structure samples are investigated by using a piezoelectric photothermal spectroscopy (PPTS). The PPT signal above the band-gap energy of GaAs substrate decreased when the sample was annealed at 815'C. In the frequency dependent(More)
Laser diodes (LDs) and other optical devices using quantum dots (QDs) are promising devices, as have already been reported. Compact and highly functional photonic integrated circuits (PICs) are desired to establish advanced photonic networks. Moreover, characteristics such as high temperature stability are essential if the PICs are integrated with(More)
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