THz valence band polaritons and antipolaritons

I. A. Faragai, M. F. Pereira

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The coupling of THz and intersubband excitations leads to THz polaritons and antipolaritons and has great potential for device applications. In this paper, based on the dielectric function formalism, we investigate the relevance of controlling cavity resonance and dephasing in the THz polariton and antipolariton dispersions. The input optical dielectric constant stems from numerically exact nonequilibrium many body solutions which are adjusted to a simplified nonlinear dielectric susceptibility. The resulting expression is inserted in the wave equation to describe the coupling of TE-polarized THz radiation and intervalence band transitions in GaAs/Al0.3Ga0.7As multiple quantum well structures with various resonance conditions.

Original languageBritish English
Title of host publicationTerahertz Emitters, Receivers, and Applications V
EditorsAlexei N. Baranov, John M. Zavada, Dimitris Pavlidis, Manijeh Razeghi
ISBN (Electronic)9781628412260
StatePublished - 2014
EventTerahertz Emitters, Receivers, and Applications V - San Diego, United States
Duration: 17 Aug 201418 Aug 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceTerahertz Emitters, Receivers, and Applications V
Country/TerritoryUnited States
CitySan Diego


  • Intersubband transitions
  • Many body effects
  • Nonequilibrium Green's functions
  • TERA-MIR radiation
  • THz antipolaritons
  • Thz polaritons


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