Optical property of modulated n-doped ZnSe/BeTe type-Ⅱ quantum wells | Zendy

Ziwu Ji | Zendy; Hirofumi Mino | Zendy; Kojima Eiji | Zendy; Akimoto Ryoichi | Zendy; S. Takeyama | Zendy

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Optical property of modulated n-doped ZnSe/BeTe type-Ⅱ quantum wells

Author(s) -

Ziwu Ji,

Hirofumi Mino,

Kojima Eiji,

Akimoto Ryoichi,

S. Takeyama

Publication year - 2008

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.57.3260

Subject(s) - quantum well , exciton , doping , condensed matter physics , electric field , materials science , quantum confined stark effect , stark effect , electron , cyclotron resonance , atomic physics , physics , optics , cyclotron , laser , quantum mechanics

We report the optical properties of the modulated n-doped ZnSe/BeTe/ZnSe type-Ⅱ quantum wells. The reflection spectra have shown typical negatively charged exciton features only in a doped sample. The luminescence spectra and the polarization anisotropy depend strikingly on both the n-doping into the barrier layers and an applied external electric field perpendicular to the layer. These are explained by screening of the built-in electric field with n-doping and Stark effects due to the applied electric field. The electron density as well as the mass was determined in high magnetic field (up to 160 T) cyclotron-resonance measurements. It was found that the observed indirect PL transition occurs via the charged excitons in a type-II quantum configuration.

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