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Phonon-induced optical superlattice.

M M de Lima1, R Hey, P V Santos

  • 1Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany. mmlimajr@pdi-berlin.de

Physical Review Letters
|May 21, 2005
PubMed
Summary
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Researchers created a dynamic optical superlattice using acoustic phonons to modulate a semiconductor microcavity. This generated unique optical properties, including energy gaps, observed through reflection and diffraction.

Area of Science:

  • Solid-state physics
  • Optics
  • Condensed matter physics

Background:

  • Semiconductor microcavities are crucial for controlling light-matter interactions.
  • Acoustic phonons can influence the optical properties of materials.
  • Dynamic control over optical properties is highly sought after.

Purpose of the Study:

  • To demonstrate the formation of a dynamic optical superlattice.
  • To investigate the role of coherent acoustic phonons in modulating semiconductor microcavities.
  • To explore the resulting optical dispersion and energy levels.

Main Methods:

  • Modulation of a semiconductor microcavity using stimulated acoustic phonons.
  • Generation of a high coherent phonon population.
  • Utilizing reflection and diffraction experiments to probe optical properties.

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Main Results:

  • Formation of a dynamic optical superlattice.
  • Observation of a folded optical dispersion relation.
  • Creation of well-defined energy gaps and renormalized energy levels.

Conclusions:

  • Stimulated acoustic phonons can effectively create dynamic optical superlattices in semiconductor microcavities.
  • The generated superlattice exhibits unique optical properties, including distinct energy gaps.
  • Reflection and diffraction are suitable methods for characterizing these phononic-photonic structures.