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<p>This work presents a theoretical investigation of multiphoton excitations of bound states induced by a time-dependent, high-intensity laser field in a GaAs/AlGa. As quantum well featuring a Razavy potential perturbed by a static electric field. The Razavy potential, characterised by its double-well structure, is implemented in the model, and numerical solutions to the Schrödinger equation are obtained using the finite difference method. This method offers several advantages, including ease of implementation, flexibility in handling complex potentials, and accurate incorporation of boundary conditions, making it especially suitable for quantum well systems. A detailed quasienergy framework based on Floquet theory is employed to determine the transition probabilities. The core focus is to examine the effects of both static and dynamic fields on energy spectra and electron transition dynamics. Additionally, the study analyses how variations in well-shape parameters, laser intensity, and frequency influence state populations. The insights gained from this investigation into multiphoton excitations provide a valuable understanding of the optical and electronic behaviour of materials with engineered quantum wells, with significant implications for photonic and optoelectronic device applications.</p>

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Theoretical analysis of laser-assisted intersubband transitions in a quantum well with a Razavy confining potential influenced by a static electric field

  • 期刊论文

  • 发表日期：

    2025年9月6日

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  • Pranjal Chakraborty,
  • Shubham Joshi,
  • Monica Gambhir

摘要

This work presents a theoretical investigation of multiphoton excitations of bound states induced by a time-dependent, high-intensity laser field in a GaAs/AlGa. As quantum well featuring a Razavy potential perturbed by a static electric field. The Razavy potential, characterised by its double-well structure, is implemented in the model, and numerical solutions to the Schrödinger equation are obtained using the finite difference method. This method offers several advantages, including ease of implementation, flexibility in handling complex potentials, and accurate incorporation of boundary conditions, making it especially suitable for quantum well systems. A detailed quasienergy framework based on Floquet theory is employed to determine the transition probabilities. The core focus is to examine the effects of both static and dynamic fields on energy spectra and electron transition dynamics. Additionally, the study analyses how variations in well-shape parameters, laser intensity, and frequency influence state populations. The insights gained from this investigation into multiphoton excitations provide a valuable understanding of the optical and electronic behaviour of materials with engineered quantum wells, with significant implications for photonic and optoelectronic device applications.