Electro-optical effects of Cd1−<i>x</i>Mn<i>x</i>Te films prepared by ionized-cluster beams

  • Kimio Nakamura
    Department of Electronics, Yamaguchi University, Tokiwadai, Ube 755, Japan
  • Tsuyoshi Koyanagi
    Department of Electronics, Yamaguchi University, Tokiwadai, Ube 755, Japan
  • Koji Yamano
    Department of Electronics, Yamaguchi University, Tokiwadai, Ube 755, Japan
  • Kakuei Matsubara
    Department of Electronics, Yamaguchi University, Tokiwadai, Ube 755, Japan

Description

<jats:p>We report the first investigation of electro-optical properties of Cd1−xMnxTe films, prepared by the ionized-cluster beam deposition technique. Measurements of the birefringence Δn of the films were performed under applied electric field in the wavelength region from 800 to 450 nm. Major results obtained are as follows: The value of Δn rises to second power against the applied electric field, and for a film with x=0.77 a large quadratic electro-optical coefficient of 3.5×10−12 cm2/V2 is obtained at 633 nm. The wavelength dispersion of Δn is observed near its band gap, suggesting that the electro-optical properties of these films are caused by the Franz–Keldysh effect.</jats:p>

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