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      https://www.ias.ac.in/article/fulltext/pram/082/02/0359-0364

    • Keywords

       

      Pump–probe reflectivity; near-surface quantum well; ultrafast spectroscopy.

    • Abstract

       

      We show that in a GaAs0.86P0.14/Al0.7Ga0.3As near-surface quantum well, there is coherent oscillation of holes observed in time-resolved reflectivity signal when the top barrier of the quantum well is sufficiently thin. The quantum well states interact with the surface states under the influence of the surface electric field. The time period of the observed oscillation is 120±10 fs.

    • Author Affiliations

       

      Salahuddin Khan1 J Jayabalan1 Asha Singh1 Rama Chari1 Suparna Pal2 S Porwal2 T K Sharma2 S M Oak2

      1. Laser Physics Applications Section, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India
      2. Semiconductor Laser Section, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India
    • Dates

       
  • Pramana – Journal of Physics | News

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