论文信息 - Short-wavelength intersubband transitions down to 1.6 μm in ZnSe/BeTe type-II superlattices

Short-wavelength intersubband transitions down to 1.6 μm in ZnSe/BeTe type-II superlattices

We report photoinduced electron intersubband absorption in ZnSe/BeTe type-II superlattices. The wavelength of the intersubband transition as short as 1.6 μm, covering the 1.55 μm optical communication wavelengths within its absorption band width (∼250 nm), is achieved in the ZnSe/BeTe SLs with 4.5 ML-thick ZnSe layers. The intensity in photoinduced intersubband absorption increases sublinearly with pump intensity, reflecting the characteristic recombination processes of electron-hole pairs in a heterostructure with type-II band alignment.

S. Kobayashi | R. Akimoto | F. Sasaki | K. Akita | Y. Kinpara

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