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Title: Ultrastrong light-matter coupling in electrically doped microcavity organic light emitting diodes

The coupling of the electromagnetic field with an electronic transition gives rise, for strong enough light-matter interactions, to hybrid states called exciton-polaritons. When the energy exchanged between light and matter becomes a significant fraction of the material transition energy an extreme optical regime called ultrastrong coupling (USC) is achieved. We report a microcavity embedded p-i-n monolithic organic light emitting diode working in USC, employing a thin film of squaraine dye as active layer. A normalized coupling ratio of 30% has been achieved at room temperature. These USC devices exhibit a dispersion-less angle-resolved electroluminescence that can be exploited for the realization of innovative optoelectronic devices. Our results may open the way towards electrically pumped polariton lasers.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [2] ; ; ;  [3] ; ; ;  [4] ;  [1] ;  [2] ;  [2]
  1. Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, Via Monteroni, 73100 Lecce (Italy)
  2. (Italy)
  3. NNL, Istituto Nanoscienze - CNR, Via Arnesano, 73100 Lecce (Italy)
  4. Dipartimento di Fisica e Scienze della Terra, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina (Italy)
Publication Date:
OSTI Identifier:
22300037
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COUPLING; DISPERSIONS; DOPED MATERIALS; ELECTRICAL PUMPING; ELECTROLUMINESCENCE; ELECTROMAGNETIC FIELDS; INTERACTIONS; LASERS; LIGHT EMITTING DIODES; ORGANIC SEMICONDUCTORS; POLARONS; STRONG-COUPLING MODEL; TEMPERATURE RANGE 0273-0400 K; THIN FILMS; VISIBLE RADIATION