Solid state cavity QED: Strong coupling in organic thin films

Jonathan R. Tischler, M. Scott Bradley, Qiang Zhang, Tolga Atay, Arto Nurmikko, Vladimir Bulović

Research output: Contribution to journalArticlepeer-review

109 Scopus citations


We review our research efforts to develop solid state integrated devices that operate in the strong coupling limit of cavity quantum electrodynamics (QED) for eventual application in high speed optical switching, optical computing, and quantum computing. Our devices contain J-aggregates of (organic) cyanine dyes which, by virtue of their molecular arrangement and strong dipolar coupling, exhibit a collective narrow linewidth high oscillator strength optical transition. Using J-aggregates, the strong coupling limit can be reached at room temperature with large coupling strengths (Rabi-splitting >250 meV) in exciton-polariton microcavity structures. We demonstrate that high quality nanoscale thick J-aggregate films can be uniformly deposited over macroscopic substrates, engineered at the molecular level, and patterned into single or multi-dimensional photonic bandgap structures. Our unique methods for depositing J-aggregates enabled us to structure light emitting devices that demonstrated the first ever electrically pumped polariton emission, uniquely accomplished in room temperature operation. Additionally, we demonstrated critically coupled resonators that concentrate nearly all of the incident light into 5 nm thick J-aggregate films, yielding a record high effective absorption constant of 6.8 × 106 cm-1 for films with thickness that is less than 1% of the incident light wavelength. Such remarkable optical properties, enabled by scalable deposition techniques, suggest that J-aggregates are a unique materials platform on which to demonstrate integrated exciton-polariton devices with the far reaching properties of polaritons in the optical domain.

Original languageEnglish
Pages (from-to)94-113
Number of pages20
JournalOrganic Electronics
Issue number2-3
StatePublished - 2007
Externally publishedYes

Bibliographical note

Funding Information:
This work has been supported in part by the Defense Advanced Research Projects Agency Brown University Optocenter, the MIT MRSEC Program of the National Science Foundation, and the NSF Interdisciplinary Research Grant. M.S. Bradley acknowledges support of the National Defense Science and Engineering Graduate Fellowship program.


  • Cyanine dye
  • Multilayer
  • Optical properties
  • Polyelectrolytes
  • Semiconductor microcavity


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