Measuring the effective phonon density of states of a quantum dot in cavity quantum electrodynamics

Research output: Contribution to journalJournal articleResearchpeer-review

  • Kristian Høeg Madsen
  • P. Kær
  • Asger Kreiner-Møller
  • Søren Stobbe
  • A. Nysteen
  • J. Mørk
  • Lodahl, Peter
We employ detuning-dependent decay-rate measurements of a quantum dot in a photonic-crystal cavity to study the influence of phonon dephasing in a solid-state quantum-electrodynamics experiment. The experimental data agree with a microscopic non-Markovian model accounting for dephasing from longitudinal acoustic phonons, and the analysis explains the difference between nonresonant cavity feeding in different nanocavities. From the comparison between experiment and theory we extract the effective phonon density of states experienced by the quantum dot in the nanocavity. This quantity determines all phonon dephasing properties of the system and is found to be described well by a theory of bulk phonons
Original languageEnglish
JournalPhysical Review B
Issue number4
Pages (from-to)045316
Number of pages5
Publication statusPublished - 24 Jul 2013

ID: 48902600